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Movement of an extremity away from the body.
A pus-filled area that affects skin or organs.
The receptacle for the head of the femur; formed by the ilium, ischium, and pubis.
Inflammation of the Achilles tendon often caused by increased activity, improper footwear, or tight hamstrings.
A disease that is characterized by profound immune system suppression and associated with opportunistic infections, secondary neoplasms, and neurologic manifestations. Caused by the human immunodeficiency virus (HIV).
Overgrowth of the bones of the hands, feet, and face.
A lateral condensation of bone that is the attachment site for the lateral and posterior two thirds of the deltoid muscle.
The insertion of needles into precisely defined points on the body; thought to realign imbalances of yin-yang and qi and thereby bring harmony to the "climate" of an individual
Movement of an extremity toward the body.
Enlargement of the glands.
Self-limiting condition resulting from any inflammatory process about the shoulder in which capsular scar tissue is produced, resulting in pain and limited range of motion; also called frozen shoulder
Exercise that uses oxidative metabolic pathways to provide energy
Muscles that produce body movement in the same direction.
A substance that produces an allergic reaction.
Biologic tissue from a cadaver that is used to surgically replace damaged tissue
A wide spectrum of treatments-many finding support from collective anecdotal evidence-that is not considered standard therapy because of the lack of a scientific rationale, clinical evidence, or a favorable historic tradition
Assessment of the injured athlete where the athlete is seen by the athletic trainer at some point following the injury.
Loss of the menstrual cycle. Considered part of the female athlete triad.
Synthetic derivatives of testosterone originally developed to treat hypogonadism in men, lost muscle mass in patients debilitated by illness, and severe anemia. Sometimes used to enhance muscle-building effects in athletes.
Exercise of short duration, not requiring the body's utilization of oxygen to make fuel available
Oxygen debt; when the cardiovascular system is unable to meet the needs of the working muscles, the anaerobic metabolism is activated
The relief of pain
A pain-relieving effect with no loss of consciousness.
A violent hypersensitivity reaction, resulting in shock.
Chest pain.
An inflammatory disorder that affects the low back and pelvis and produces stiffness and pain
Marked stiffness of a joint typically observed with end-stage arthritis, following a complex intra-articular fracture, delayed treatment of septic arthritis, or severe rheumatoid arthritis
A region of the intervertebral disk that provides support for the nucleus.
A nutritional disorder that occurs in as many as 1% of individuals in a vulnerable population in which an individual refuses to maintain body weight over a minimal normal weight for age and height.
Muscles that produce body movement in opposing directions.
Increased soft-tissue pressure in the anterior compartment of the lower leg, resulting in pain, decreased sensation, and muscle paralysis
An acute knee injury that occurs when the foot is planted, the knee is flexed, and a valgus force is applied to the knee with the lower leg in external rotation; commonly occurs in sports that require twisting, jumping, and pivoting.
Blunt bony projection on the anterior border of the ilium, forming the anterior end of the iliac crest. Serves as the origin of the sartorius muscle.
Surface at the front of the body, facing the examiner
When the medial plateau of the tibia rotates anteriorly and medial joint opening occurs, indicating disruption of the superficial tibia collateral ligament, medial and posteromedial capsular structures, and anterior cruciate ligament
Anterior-posterior view in which the x-ray tube is in front and the film cassette is in back. The x-ray beam passes from front to back.
A substance that can counteract a poison.
Foreign substances that can infiltrate the body, including bacteria, fungi, parasites, toxic chemicals, and abnormal body cells, prompting the production of antibodies that attempt to destroy the substances.
A drug that counteracts the effects of histamine; one use is to relieve the symptoms of an allergic reaction.
A fever-relieving or -reducing property.
The outer ring of fibrous material surrounding the nucleus of the intervertebral disks
A broad, fibrous sheet that attaches one muscle to another.
A cartilaginous structure at the insertion of major muscle groups into bone that may be susceptible to overuse syndromes and acute fractures in pediatric athletes.
Inflammation of the appendix, the small intestinal pouch that extends from the cecum.
Irregular heartbeat.
Small tubular branches of the arteries.
Aspiration of a joint
The surgical fusion of a joint. The procedure removes any remaining articular cartilage and positions the adjacent bones to promote bone growth across a joint. A successful fusion eliminates the joint and stops motion. The usual purpose is pain relief or stabilization of an undependable joint
A procedure in which a contrast medium is injected into a joint to outline soft tissues such as the meniscus in the knee or a torn structure such as the rotator cuff in the shoulder. MR arthrography is a technique in which a diluted contrast medium such as gadolinium is injected into a joint to improve the delineation of soft tissues. Standard MRI is obtained following the injection.
Vertebral motion that occurs within the joint capsule at the articulations.
procedure to replace or mobilize a joint, typically performed by removing the arthritic surfaces and replacing them with an implant. Total joint arthroplasty is replacement of both sides of the joint. Hemiarthroplasty replaces only one side of a joint
A form of minimally invasive surgery in which a fiberoptic camera, the arthroscope, is introduced into an area of the body through a small incision
A smooth, glistening surface that covers the ends of bones that articulate with each other to form a joint.
Removal of fluids from a body cavity; often done to obtain specimens for analysis
A chronic inflammatory disorder of the airways associated with changes in airway hyperresponsiveness.
An infection of the toe web space.
A qualified allied healthcare provider who is educated in the management of healthcare problems of athletes.
An orthopaedic problem seen frequently in athletes with Down syndrome that poses a significant risk to athletes participating in sports that involve bodily contact. Joint looseness, ligamentous laxity, or malformation of the vertebrae or surrounding structures causes the C1 vertebra to slip forward and compress the spinal cord, particularly when the neck is in flexion or extension.
A rare condition consisting of congenital fusion of the ring of the atlas to the occiput; considered an absolute contraindication for contact sports.
The first cervical vertebra (C1).
The upper chambers of the heart, composed of the left and right atria.
Biologic tissue from the patient's own body that is used to surgically replace damaged tissue
A health concern for athletes with a spinal cord injury above level T8 in which the athlete experiences dizziness, sweating, headaches, and potentially severe hypertension. A plugged urethral catheter is the most common trigger; however, fecal impaction, renal calculi or infections, and pressure sores can also cause the condition.
A condition in which cells die as a result of inadequate blood supply; see also osteonecrosis
A fracture that occurs when a ligament or tendon pulls off a sliver of the bone
A fracture caused by a violent muscle contraction or sudden passive stretch. Also, pulling off of the osseous insertion or origin in a child.
A force directed along the vertical axis of the cervical spine that is part of almost every serious injury.
A load directed vertically along the axis of the cervical spine during a compression force such as spearing or a head-on collision.
The second cervical vertebra (C2).
A grade II nerve injury resulting from nerve stretching in which the endoneurium remains intact.
One of five types of microorganisms that commonly causes disease, characterized by absence of a nucleus and endoplasmic reticulum. Bacteria are classified according to their shape and are designated as gram positive or gram negative.
Classification of antibiotic in which bacteria are destroyed.
Classification of antibiotic in which bacteria are not killed, but are prevented from reproducing.
A small chip fracture off of the anterior and inferior rims of the glenoid that is seen after an anterior dislocation of the shoulder.
An anterior capsulolabral injury associated with a tear of the anteroinferior glenoid labrum.
Sedative-hypnotic drugs.
Demarcated masses of gray matter in the interior of the cerebral hemispheres.
The rate at which an individual burns calories while performing an activity.
Rupture of the extensor tendon at or near its insertion on the terminal phalanx caused by a sudden flexion force on the distal interphalangeal joint while the finger is actively extended; also known as mallet finger.
Inflammation of the biceps tendon in its subacromial location
The study of external and internal forces applied to the body and their relationship to stability and motion.
An accessory bony fragment connected to the body of the patella by a line of cartilage.
Potent inhibitors of osteoclasts and bone resorption. May be used to treat osteoporosis and Paget disease.
The percentage of an individual's weight that is made up of fat.
A procedure used to detect osteopenia in which a special density gradient plate is used to evaluate the comparative density of the spine, femur, or distal radius. Photons from a single- or dual-emitting source are used to measure the density of the bone. These are then compared with normal values for a large patient population based on sex and age.
A process that couples bone resorption by osteoclasts with deposition of osteoblasts (new bone cells)
A study used to identify lesions in bone such as fracture, infections, or tumor. A radioisotope is injected into a vein and allowed to circulate through the body. The distribution of radioactivity in the skeleton is measured by a special camera that can detect the emission of gamma rays. Lesions in bone with increased metabolic activity (eg, fracture, tumor, or infection) will show increased uptake of the radioisotope and appear as a dark area in the bone. Also called bone scintigraphy
Rupture of the central slip of the extensor tendon of the middle phalanx caused by rapid, forceful flexion at the proximal interphalangeal joint; characterized by flexion of the proximal interphalangeal joint and hyperextension of the distal interphalangeal joint.
Unusually slow, but regular heartbeat.
A classification of material that deforms little before failure, such as glass.
Complete longitudinal tear of the central segment of the meniscus with the torn fragment "flipped" into the joint like the handle of a bucket
A blister that is larger than 1 cm.
Prominence of the first metatarsal head often associated with lateral shift of the great toe (hallux valgus deformity)
A neurapraxia from a stretch injury to the brachial plexus; most commonly seen in football players. Also known as a stinger.
An acute upper trunk brachial plexus injury resulting from head, neck, or shoulder contact in football.
A sac formed by two layers of synovial tissue that is located where there is friction between tendon and bone or skin and bone
A sac formed by two layers of synovial tissue that is located where there is friction between tendon and bone or skin and bone.
Inflammation of a bursa
A compression-type fracture of a vertebra that involves posterior displacement of the fragments, often into the spinal canal
A facial injury where the skin is compressed against underlying bony prominences at impact and a jagged opening occurs with a variable amount of ischemia and necrosis.
Congenital pigmented skin marks; the color of coffee with milk
A substance found in some food and drinks that stimulates the central nervous system; excess caffeine can cause nervousness, muscular tremors, and heart palpitations.
Heel bone
A buildup of the keratin layer from repetitive friction or injury; frequently occurs on the plantar surface of the foot around the great toe.
The calorie intake required to offset calorie expenditure, resulting in a constant body weight.
Abnormally growing cells that can invade local tissue, often metastasizing (spreading) to distant areas of the body through the lymphatic system or bloodstream.
Small, thin-walled blood vessels that have close contact with individual cells of the body.
A collagenous structure that surrounds a joint like a sleeve. The capsule allows motion of joints and protects the articular cartilage. The capsule, along with ligaments, tendons, and bony structure, provides stability of the joint
One of the six classifications of nutrients and one of the three types of energy-yielding nutrients. Carbohydrates are classified by the number of sugar molecules they contain.
The practice of maximizing glycogen stores by decreasing training and increasing carbohydrate intake during the week before an endurance event.
A complex arrangement of connected tubes comprising the heart, arteries, arterioles, capillaries, venules, and veins.
Median nerve compression at the wrist that is characterized by pain, numbness, and weakness in the median nerve distribution of the hand
The angle formed by the long axis of the humerus and ulna, resulting in an abducted position of the forearm relative to the humerus.
A cellular tissue that, in the adult, is specific to joints, but in children forms a template for bone formation and growth. Hyaline cartilage is a low-friction cellular tissue that coats joint surfaces. Fibrocartilage is tough with high collagen content, such as found in the meniscus of the knee, or the anulus fibrosus portion of the intervertebral disk
Excessive height of the longitudinal arch of the foot
Inflammation of subcutaneous tissue. Can be caused by trauma or infection.
A bacterial infection of the soft tissues that most often occurs after trauma to the skin or prior surgery. Also, a spreading redness and swelling of the skin in response to an insect bite.
The least severe sport-related brain injury that is characterized by immediate and transient impairment of neural functions.
A bruise of the brain substance that may result from an impact of the skull and an object.
An almost protein-free fluid that acts as a shock absorber to cushion and protect the brain.
An injury where disk material pushes against or ruptures the annulus fibrosus to impinge against the spinal cord or nerve root.
Forward curvature of the cervical spine.
Muscle soreness and stiffness caused by overstrain or a contusion; also known as a quadriceps contusion.
A local cold injury from repeated, prolonged exposure of bare skin to low temperatures and high humidity, resulting in swollen, tender areas on the fingers and toes.
Infection or inflammation of the gallbladder.
The cells that form cartilage
The cells in cartilage that produce proteoglycans.
An important class of glucosaminoglycans in articular proteoglycans; the oral form is thought to prevent degradation of joint cartilage and relieve symptoms
Softening of the articular surface that results from exposure of normal cartilage to excessive pressure or shear
Softening of the articular surface that results from exposure of normal cartilage to excessive pressure or shear.
A primary sarcoma formed from cartilage cells or their precursors but without direct osteoid formation
Tear of the rotator cuff of the shoulder resulting from degeneration within the rotator cuff tendon
Shoulder pain with active flexion, abduction, and/or internal rotation, but near normal passive range of motion; most commonly found in the senior athlete.
A stage in the continuum of patellofemoral dysplasias; the patella partially dislocates out of the intercondylar groove and snaps back into place rather than completely dislocating.
A sensation of coolness with pain.
The collarbone
The collarbone.
Fracture of the growth plate of the clavicle; may appear clinically as a dislocation, especially if some displacement is present
Deformity involving hyperextension of the MTP joint and a hyperflexion of the interphalangeal joint
An injury to the chest in which the skin has not been broken.
A fracture that does not disrupt the integrity of the surrounding skin
A procedure to restore normal alignment of a fractured bone or dislocated joint in which the fractured bones are simply manipulated and no incision is needed
A complex foot disorder that includes three separate deformities: metatarsus adductus, ankle equinus, and heel varus
A painful, stiff finger with a fixed-flexion deformity of the joint resulting from a hyperextension injury.
A triple helix protein that is the major structural macromolecule of the extracellular matrix of articular cartilage; found also in bone, tendon, and ligament
A family of stiff, helical, insoluble protein macromolecules that function as scaffolding and provide tensile strength in fibrous tissues and rigidity in bone.
Fracture of the distal radius, with dorsal displacement of the fragments; often caused by a fall on an outstretched arm with the hand extended
A fracture with more than two fragments
Nerve lying below the head of the fibula that controls movement at the ankle and supplies sensation to the top of the foot
Ischemia of the nerves and muscles within a fascial compartment caused by elevated pressure within the compartment; frequently seen in association with tibial fractures
A condition that occurs when the amount of swelling and/or bleeding in a muscle compartment causes pressure that is greater than the capillary pressure and results in tissue ischemia and potential tissue necrosis.
Any fracture in which the overlying skin has been penetrated
A radiographic modality that allows cross-sectional imaging from a series of x-ray beams. The x-ray tube is rotated 360° around the patient, and the computer converts these images into a two-dimensional axial image. CT is capable of imaging bone in three planes: coronal, sagittal, and oblique. This modality is particularly useful in evaluating fractures and bone tumors
Transfer of heat from the body, which is warmer, to a cooler object such as a cold, wet shirt or an ice pack.
A rounded process at the end of a long bone
A syndrome often seen in athletes of short stature or dwarf in which individual vertebrae of the spine may contain short pedicles that decrease the diameter of the spinal canal.
Tissue that connects and supports the structures of the body
Inflammation of the skin caused by materials or substances coming in contact with it; may involve either allergic or nonallergic mechanisms.
A disease that can be transmitted from one person to another.
Bruise; injury to soft tissue without a break in the skin
Transfer of heat to the cooler air as air moves across the body surface. The air is warmed and the body is cooled.
A structure formed by the acromion process and the coracoacromial ligament; comprises the roof over the lateral shoulder.
A muscle that assists in flexion and adduction of the glenohumeral joint.
A buildup of compacted keratin that exerts pressure on the skin when shoes are worn; usually occurs on the soles of the feet.
A coronal plane is any plane of section in the anatomical position that passes vertically through the body and is perpendicular to the median plane. It divides the body into anterior and posterior sections.
Dense bone that is responsible for skeletal homeostasis
Cortisone-like medicines that are used to provide relief for inflamed areas of the body. They lessen swelling, redness, itching, and allergic reactions. Often used for a number of other diseases such as asthma or other auto immune diseases.
Fused costal cartilages of the sixth to tenth ribs forming the upper border of the abdomen
Angle that is formed by the spine and the tenth rib; the kidneys lie beneath the back muscles in the costovertebral angle
Cyclooxygenase-1 enzyme; an enzyme that is present in most bodily tissues (including platelets and gastrointestinal mucosal tissues) and serves as a "housekeeping" enzyme to form prostaglandins
Cyclooxygenase-2 enzyme; an enzyme that is thought to be present in the body only when induced in response to injury and is responsible for the formation of prostaglandins that mediate pain and inflammation
A deformity of the hip in which the ball of the hip joint is enlarged. May be secondary to Legg-Perthes disease or arthritis.
A valgus or abduction deformity of the hip. The neck/shaft angle in increased.
Eight bones of the skull that protect the brain; include the frontal bone, two parietal bones, two temporal bones, occipital bone, sphenoid bone, and ethmoid bone.
Twelve pairs of special nerves that are associated with various sensory and motor functions.
A nutritional supplement used to increase anaerobic power and strength.
Continued deformation of soft tissue in response to a maintained load.
A grating or grinding sound
A grating or grinding sound.
An injury produced as a result of continuous pressure applied to a part of the body, usually an extremity
The therapeutic use of cold
Compression of the ulnar nerve at the elbow
Cubitus varus is a bowing (or adduction) deformity of the elbow. Cubitus valgus is an elbow aligned in the opposite direction.
The removal of growths from within cavity walls; in the treatment of musculoskeletal tumors, the scraping of tumor out of bone
A procedure in which the bladder is filled with a radiographic contrast agent and a radiograph is obtained, followed by a second radiograph after the contrast agent has been drained; used to determine bladder injuries.
Venous clot formation caused by immobilization, hypercoagulation, obstructed venous flow, or endothelial injury, among others
The amount of lengthening or shortening in a structure divided by the structure's original length.
Deterioration of the articular cartilage that lines a joint, which results in narrowing of the joint space and pain; osteoarthritis
An adrenal hormone that is a metabolic precursor for the production of testosterone, estrogen, and other hormones. Sold as an over-the-counter nutritional agent that is sometimes used as a substitute for anabolic steroids or testosterone to decrease fat mass and increase muscle mass.
Muscle pain or discomfort that follows unaccustomed vigorous exercise and persists for several days despite the cessation of activity.
A delay in normal fracture healing; not necessarily a pathologic process
A change in electricity in the heart caused by an electrical impulse and resulting in contraction of individual myocardial cells.
Inflammation of the skin that encompasses a broad range of disorders; usually appears as an itchy area of redness or scaling.
The layer of skin that contains connective tissue and gives skin elasticity and strength.
A metabolic disorder characterized by hyperglycemia caused by defects in insulin secretion, insulin action, or both.
The shaft of a long bone.
A specialized articulation in the acromioclavicular capsule that permits free movement.
Separation of the distal tibia and fibula.
Relaxation of the heart muscle.
The most concentrated source of energy in the diet, made up of saturated, monounsaturated, and polyunsaturated fats, which each provide 9 calories per gram of fat.
A procedure in which a radiopaque material is injected into a lumbar or cervical intervertebral disk to outline the disk. This procedure used in conjunction with CT to help identify the source of back pain. The pain produced by the injection is correlated with the patient's symptoms.
A congenital deformity in young athletes in which the meniscus is discoid in shape rather than semilunar.
A surgical decompression procedure in which an intervertebral disk is removed
Complete disruption in the normal relationship of two bones forming a joint (ie, no contact of the articular surfaces). The direction of the dislocation is described by the position of the distal bone (eg, with an anterior dislocation of the shoulder, the humerus is displaced anterior to the scapula).
A fracture that produces deformity of the limb
Location in an extremity nearer the free end; location on the trunk farther from the midline or from the point of reference
A separation of joint surfaces with no dislocation or ligament rupture.
Toward the posterior surface of the body
A congenital condition that is characterized by mental retardation and various physical characteristics. Approximately 50% of individuals with Down syndrome have a congenital heart defect.
A diagnostic imaging technology that uses two different x-ray voltages to assess bone density
A classification of material that deforms extensively before failure, such as soft metal.
The outermost tough fibrous membrane that lies immediately inside the bone as part of the meninges.
In strength training, the time necessary to complete a desired exercise.
Short stature characterized by an adult height of less than 58" in males or a standing height below the third percentile for age
The use of muscle strength and muscle coordination during performance of activities; used in rehabilitation.
The magnitude of isotonic or isokinetic contraction
Discomfort following meals as a result of impairment of digestive function.
A broad term that describes a condition affecting growth or development in which the primary defect is intrinsic to bone or cartilage
A state of difficult or labored breathing that results from either trauma or disease.
A condition resulting from defective or faulty nutrition, broadly construed to include nourishment of tissue by all essential substances, including those normally manufactured by the body itself
exercises Exercises in which the muscle lengthens despite resisting a force, as in slowly lowering a weight
Bruising or discoloration associated with bleeding within or under the skin
A bluish discoloration of the skin caused by bleeding under the skin; a bruise.
Condition in which fluid escapes into the tissues from vascular or lymphatic spaces and causes local or generalized swelling
The presence of fluid within a joint
Intra-articular swelling.
Treatment in which the biphasic current delivers stimulation to muscles in a variety of ways, including pulse, surged, or tetanizing contractions
A recording of electrical currents that flow through the heart in the form of a series of waves and complexes that are separated by regular intervals.
A test that measures the electrical response of muscle contraction
Process in which capillaries grow among mesenchymal cells, forming a fibrovascular tissue known as callus that bridges the gap between bone ends
The process of long bone formation where the cartilage model is replaced by bone.
The formation of bone within a cartilage model
A fibrous tissue that coats axons.
The layer of skin that protects against ultraviolet damage and provides cutaneous immunity.
A blood clot located outside the dura mater.
A disorder caused by abnormal electrical activity in the brain that results in recurring seizures.
An agent that rapidly produces bronchodilation to reverse the effects of an allergen on a patient's airway.
The part of a long bone that produces growth
A part of a long bone developed from a center of ossification distinct from that of the shaft and separated at first from the latter by a layer of cartilage.
The rounded end of a long bone at the joint.
A glistening, synovial-like membrane that envelops the tendon surface.
An imaginary line that divides a surface into two approximately equal areas.
Plantar flexed position of the ankle
Redness of the skin.
A primary sarcoma of the bone that usually arises in the diaphyses of long bones, ribs, and flat bones of children and adolescents
A spur or bony overgrowth.
Movement of an extremity posterior to or behind the body.
A muscle, the contraction of which causes movement at a joint with the consequence that the limb or body assumes a more straight line, or so that the distance between the parts proximal and distal to the joint is increased or extended; the antagonist of a flexor
Complex interaction of muscles, ligaments, and tendons that stabilizes the patellofemoral joint and acts to extend the knee
Stabilization of a fracture or unstable joint by inserting pins into bone proximal and distal to the injury that are then attached to an external frame.
Lateral rotation of an extremity relative to the body.
A liquid product that has escaped from blood vessels and been deposited in tissue as a result of inflammation.
Sheet or band of tough fibrous connective tissue; lies deep under the skin and forms an outer layer for the muscles
Bundles of fibers within muscle fibers.
Surgical incision of the fascia.
The speed of contraction of type II muscle fibers.
Type II muscle fibers.
Respiratory distress and cerebral dysfunction caused by droplets of marrow fat released at a fracture site and deposited in the lungs or brain
All tissue in the body that is not fat, including bone, muscle, organ, and connective tissue.
Microfracture that occurs when the bone is subjected to frequent, repeated stresses, such as in running or marching long distances, and the rate of bone breakdown exceeds the rate of bone repair.
Specialized soft tissue structure for weight bearing and absorbing impact
Infection of the pulp of the distal phalanx of the finger.
The constellation of abnormal or absent menses, eating disorders, and osteoporosis/stress fractures seen in female athletes
The result of behavior that affects female athletes and consists of disordered eating, amenorrhea, and osteoporosis.
Intoeing.
Two surfaces at the distal end of the femur that articulate with the superior surfaces of the tibia
Proximal end of the femur, articulating with the acetabulum
The bone connecting the head and the shaft of the femur; fractures frequently occur in this area
Pain and weakness in the femoral nerve distribution as the result of a stretch or trauma to the nerve.
A mesh of collagen fibers, proteoglycans, and glycoproteins, interspersed with fibrochondrocytes.
Cells that are able to synthesize fibrous extracellular proteins and have the rounded appearance of chondrocytes
Diffuse pain in multiple sites that does not result from trauma and is associated with emotional disturbances.
The typical patching material for wound repair.
Ligament that inserts from the femoral condyle to the fibular head
A fracture usually located a few centimeters above the ankle joint as the result of repetitive loads on the bone that cause an imbalance of bone resorption over formation.
A fracture of at least four consecutive ribs in two or more places; the most serious of chest wall injuries.
The capacity of a muscle to lengthen or stretch
Movement of an extremity anterior to or in front of the body.
A muscle the action of which is to flex or bend a joint
The eleventh and twelfth ribs, which do not connect to the sternum
A special type of radiograph that shows continuous motion of the structure, such as wrist motion
Inflammation of a follicle or follicles, most often hair follicles.
A guide to daily food choices presented by the US government that includes food from five groups that provide essential nutrients.
The space between the pedicles of two adjacent vertebrae through which the nerve root exits at each level in the cervical spine.
An action that changes the state or motion of a body to which it is applied. Can be external, such as gravity, or internal, such as forces generated by muscles, bone, and soft-tissue deformation.
A disruption in the integrity of a bone
Bone developed after a fracture; initially formed from a hematoma at the bleeding edges of bone, it eventually forms a cartilage mass that is remodeled into mature bone
A fracture of bone associated with a dislocation of its adjacent joint.
The realignment of fracture fragments to restore normal anatomy of the bone
An osteochondrosis or osteonecrosis of the metatarsal head.
In strength training, the number of workouts completed per unit of time; also refers to how many workouts occur during 1 week.
A condition characterized by restricted shoulder movement resulting from acute trauma or a periarticular biceps or rotator cuff tendon injury.
Pain that cannot be linked with any anatomic pathology.
The joining of two bones into a single unit, thereby obliterating motion between the two. May be congenital, traumatic, or surgical.
Dislocated ulna with a fractured radius
Rupture of the ulnar collateral ligament.
A mass of nerve cell bodies usually found lying outside the central nervous system
An injury that involves the medial side of the complex; symptoms include sudden pain with a popping sensation in the calf, followed by swelling and ecchymosis; also known as tennis leg.
An irritation or inflammation of the gastrointestinal tract that is indicated by vomiting or diarrhea.
Genu valgum is knock-knee deformity; genu varum is bowleg deformity
Knock-knees.
Bowlegs.
The attachment site for the iliotibial band.
Form of diabetes that is first detected in pregnancy and usually resolves when the pregnancy is completed.
Injury in which the humeral head may displace from the joint; most of these dislocations are anterior and inferior to the glenoid rim
Excessive shoulder laxity accompanied by pain or feelings of instability.
True shoulder joint
A soft fibrous rim surrounding the glenoid fossa that deepens the socket and provides stability for the humeral head.
Tear of the glenoid labrum; can result from acute trauma or overuse
A fundamental component in the synthesis of both hyaluronic acid and chondroitin that is thought to promote cartilage repair and synthesis; the oral form is taken as a dietary supplement to treat arthritis
An inflammatory arthritis associated with deposition of urate in the joint
One of the three hamstring muscles of the knee that make up the pes anserine and help protect the knee against rotatory and valgus stress (the other ones are the sartorius and semitendinosus)
Broad, flat process at the upper end of the lateral surface of the femur to which several muscles are attached
A fracture that disrupts only one side of the bone. This fracture pattern is seen in children because of the greater plasticity of their bones.
A type of lightning strike in which the lightning hits the ground first and travels along the ground to the individual.
Proteins that are produced and released by one cell, and then act on the same cell, adjacent cells, or remote cells to influence growth and division.
The body's posture or physique.
The great toe
A painful loss of motion of the great toe metatarsophalangeal joint caused primarily by arthrosis.
Deformity at the first metatarsophalangeal joint where the proximal phalanx deviates laterally; also known as a bunion.
Flexion deformity of the distal interphalangeal joint of the foot
Three muscles in the posterior region of the buttock and thigh that provide an extension force at the hip and a flexion force at the knee.
The upper or proximal portion of a structure; the head of a bone is the rounded end that allows joint rotation
A collection of blood within a joint.
A collection of blood resulting from injury
The presence of blood in the urine.
Bones located on each side of the sacrum; composed of the fused ilium, ischium, and pubis.
Paralysis of one side of the body.
Rupture of the nucleus pulposus or anulus fibrosus of the intervertebral disk
The formation of bone in any nonosseous tissue; often occurs following trauma
An indentation or compression fracture of the posterior superolateral articular surface of the humeral head that is created by the sharp edge of the anterior glenoid as the humeral head dislocates over it.
The mineral component of bone matrix that is deposited into the organic framework to make the bone hard and strong.
A condition in which blood sugar rises above normal levels, leading to excretion of glucose in the urine and excessive thirst and urination.
An increase in normal motion.
A painful dysfunction where a facet of the vertebral body becomes "locked."
The amount of relaxation, or variation in the load-deformation relationship, that takes place within a single cycle of loading and unloading in soft tissue.
Ice, compression, elevation, and splinting
An overuse injury where repetitive flexion and extension causes inflammation of the iliotibial band when it rubs over the lateral femoral condyle.
An increase in activity of the spleen.
A fracture pattern in which the fragments are pushed together, thus imparting some stability.
A contagious skin condition in which flaccid crusts and blisters cluster in involved areas, most commonly around the mouth.
Shoulder pain caused by tendinosis of the rotator cuff tendon or irritation of the subacromial bursa. See also Rotator cuff impingement, external, and Rotator cuff impingement, internal
A disease caused by an abnormal invasion of a host by a bacteria, virus, or parasite.
A localized tissue response initiated by the injury or destruction of vascularized tissues. Inflammation Heat, redness, swelling, and pain that accompany musculoskeletal injuries; occurs when tissue is crushed, stretched, or torn
Looseness, unsteadiness, or an inability to withstand normal physiologic loading without mechanical deformation.
The degree of work or effort exerted by the athlete during strength training.
Surgical insertion of a device that stops motion across a fracture or joint to encourage bony healing or fusion
Medial rotation of an extremity relative to the body.
A fibrocartilaginous disk located between the bodies of each of the vertebrae.
A procedure for the fixation of fractures in which a nail or rod is inserted into the intramedullary canal of the bone from one of its two ends
Bone formation characterized by the aggregation of undifferentiated mesenchymal cells, which differentiate into osteoblasts
The growth of bone without a cartilage model.
Ankle injury resulting from landing on the lateral aspect of the foot
The administration of medication through the skin by direct electrical current.
Tissue deprived of a blood supply.
Literally, "same speed"; when applied to muscle action, it implies constant velocity of shortening
In isokinetic contractions, the muscle contracts and shortens at constant speed.
Literally, "same length"; when applied to muscle action, it implies that the muscle length is held constant even with varying loads. Accomplished by contracting the flexors and extensors of a joint at equal loads so that the joint does not move.
When applied to muscle action, the condition when a muscle shortens against a constant load, as in lifting a weight
Contraction of muscles concentrically or eccentrically against resistance with movement of the part so that the load remains constant
The junction between the ends of two adjacent bones.
A thin, but strong structure in the elbow that plays a role in ligamentous restraint.
Skilled, passive movement of a joint (or spinal segment) either within or beyond its active range of motion; also known as joint mobilization.
Passive movement techniques used to treat joint dysfunctions such as stiffness, reversible joint hypomobility, and pain.
Capsular laxity that allows movement at the joint that may be demonstrated passively, but cannot be actively performed by the patient; used in joint mobilization.
Stress fracture of the proximal shaft of the fifth metatarsal; a fracture that frequently heals with difficulty
Chronic tendinosis of the patellar tendon; frequently limited to the distal pole of the patella rather than being diffused throughout the tendon
A chronic inflammatory disease in children that is characterized by pain, swelling, and tenderness in one or more joints and may result in impaired growth and development
A neoplasm seen in AIDS patients in the form of a malignancy of the skin.
A type of splint used to reduce any significant displacement in the treatment of an epiphyseal fracture of the clavicle.
A form of acidosis (accumulation of acids in the body) in uncontrolled diabetes in which accumulation of certain acids occurs as the result of unavailable insulin.
Organic substances in the urine that are derived from fat metabolism. Presence in the urine indicates that exercise should be cancelled for the day.
The study of the movement of rigid structures without reference to the cause of motion, ie, independent of the forces that produce it.
The study of motion of the human body.
A term used to define the body's ability to detect positional changes.
The energy of a moving body; equals one half the mass times the square of the velocity.
The study of the forces that produce movements.
A condition where there is congenital fusion of two or more vertebrae; participation in contact sports depends on numerous factors and requires extensive evaluation.
Osteochondrosis of the tarsal navicular
Curvature of the spine that is convex posteriorly
A test to confirm integrity of the anterior cruciate ligament of the knee.
Mature layered bone.
Mature, well-organized form of cortical bone
A surgical decompression procedure in which part of the posterior arch of a vertebra is removed; allows access to the disk
Lying away from the midline
A bony process on each end of the clavicle.
Forms the lateral border of the upper surface of a joint
Inflammation of the lateral epicondyle; also known as tennis elbow.
Bony prominence at the end of the fibula that is part of the ankle joint
The lateral C-shaped fibrocartilaginous structure of the knee
The mildest form of patellofemoral dysplasia with some degree of malalignment.
A view that passes from side to side at 90° to an AP or PA view
The irrigation or thorough washing of an infected joint with high-volume saline solution
Osteonecrosis of the proximal femoral epiphysis that most commonly affects boys aged 3 to 8 years.
White blood cells that migrate toward increasing concentrations of mediators at the site of injury.
A collagenous tissue that connects two bones to stabilize a joint
Surgical removal of a tumor without amputation of the affected extremity
A fracture-dislocation of the tarsometatarsal joint
Any force or combination of forces applied to the outside of a structure.
The mathematical relationship of the load applied to a structure; used to determine the strength and stiffness of a structure.
Arch along the long axis of the foot formed by the bones of the foot starting at the weight-bearing surface of the calcaneus and ending at the metatarsal heads
The position in which a joint capsule is most relaxed and the greatest amount of joint play is possible.
Curvature of the spine that is convex anteriorly
One of the two types of cholesterol; the so-called "bad" cholesterol.
Anticoagulants that work by binding to antithrombin-III and catalyze its inactivation of factor Xa
An infectious disease that is commonly spread by the bite of an infected tick.
Cancer of the lymphatic tissue first arising in the lymph nodes.
An imaging modality that depends on the movement of protons in water molecules. When subjected to a magnetic field, protons that are normally randomly aligned become aligned. Radiowaves directed at the tissue to be studied are used to change the alignment of these photons. When the radiowaves are turned off, the protons emit a signal that is detected and processed by a computer into an image. In the musculoskeletal system, MRI is useful in diagnosing soft-tissue injuries, tumors, stress fracture, and infection.
Rupture of the extensor tendon at or near its insertion on the terminal phalanx caused by a sudden flexion force on the distal interphalangeal joint while the finger is actively extended; also known as baseball finger.
Healing of a fracture in an unacceptable position
A rare genetic disorder that is inherited as an autosomal dominant condition in which connective tissue is affected, weakening the aorta and causing an aneurysm or rupture of the aorta.
A method of determining the maximal heart rate that estimates a rate of 220 beats per minute minus the individual's age in years.
The criterion measure of cardiovascular fitness representing the maximal ability of the cardiopulmonary system to deliver oxygen to the working muscles and the muscle's ability to use that oxygen to produce adenosine triphosphate (ATP) aerobically.
A representation of the patterns of energy that cause traumatic injuries
Lying toward the midline
A bony process on each end of the clavicle.
An acute knee injury that is the result of a blow to the lateral side of the knee when the foot is planted; commonly seen in football players and snow skiers.
Forms the medial border of the upper surface of a joint
A bony prominence located proximal and medial to the trochlea; serves as the attachment site for the flexor-pronator muscle group and the ulnar collateral ligament.
A type of skin cancer characterized by an asymmetric pigmented lesion with an irregular border that usually arises from a previously normal mole. Risk factors include fair skin, family history, more than 50 moles on the body, or a history of sunburn as a child.
A soft-tissue structure that lines some joints and provides load distribution, shock absorption, and lubrication.
A subset of sports trauma patients who are at risk for connective tissue breakdown following relatively benign load or use.
The five bones of the hand that extend from the wrist to the fingers.
The broad portion of a long bone adjacent to a joint. In children, the broad portion of a long bone includes the epiphysis, the physis, and the metaphysis.
The flare at either end of a long bone.
The transfer of disease from one part of the body to another; tumor metastasis usually occurs via the bloodstream or the lymphatic system
Generalized pain in the forefoot.
Congenital deformity of the forefoot in which the forefoot is rotated laterally in relation to the hindfoot; also called metatarsus abductus
Congenital deformity of the forefoot in which the forefoot is rotated medially in relation to the hindfoot; also called metatarsus adductus
Destruction of a small number of cells caused by additive effects of repetitive forces
Imaginary straight vertical line drawn from midforehead through the nose and the umbilicus to the floor
Physical agents that can create an optimum environment for injury healing, while reducing pain and discomfort
Dislocation of the radial head in association with an ulnar fracture
An interdigital neuroma of the foot causing pain, numbness, and tingling.
Congenital abnormality characterized by a short first metatarsal, which throws weight-bearing stresses to the second metatarsal head, often resulting in pain
Symptomatic glenohumeral instability in more than two directions.
Contractile connective tissues that affect movement; a component of nearly all organs and body systems.
One of five types of microorganisms that commonly causes disease, characterized by a single cell and with no rigid cell wall. Mycoplasma are similar to bacteria.
A radiographic study in which a water-soluble contrast agent is injected into the subarachnoid space to form a column of opacified fluid that outlines the thecal sac of the spinal cord. Used to assess herniated disks and spinal stenosis. This study has been largely replaced by MRI and CT.
An abnormal condition of the spinal cord, whether through disease or compression. The usual consequences are spasticity, impairment of sensation, and impairment of bowel and bladder function.
The embryonic cells that develop into skeletal muscle cells
Bruising of the heart muscle.
Heart attack resulting from blockage of the major coronary vessels and lack of oxygen to the myocardium, causing permanent damage to or death of the heart muscle.
A painful musculoskeletal response following muscle trauma.
The fibers that constitute a muscle
A slender thread within a muscle fiber that functions in muscle contraction
A protein that serves as a storage site for oxygen and speeds the diffusion of oxygen into muscle fibers.
A wide and varied group of primary muscle disorders characterized by weakness
The formation of lamellar bone within muscle, often as a result of blunt trauma.
The areas of muscle that are supplied by a particular nerve root.
Bone with which the head of the talus articulates on the medial side of the foot; also a bone in the wrist that articulates with the trapezium, trapezoid, and other carpal bones
A fracture that occurs with repetitive stress activities and results in medial foot pain and tenderness over the dorsal navicular.
The constricted portion of a structure (eg, femoral neck)
Studies that test the speed by which motor, sensory, or mixed (combined motor and sensory) nerves transmit impulses
Pain along the course of a nerve
A temporary loss of neural function
Inflammation or irritation of a nerve
A tumor composed of nerve cells
The chronic, progressive destruction of a joint that is caused by the loss of sensation from an underlying neurologic dysfunction; also known as Charcot arthropathy
An abnormal condition involving a peripheral nerve
A grade V injury in which there is complete nerve disruption leading to the death of the distal axons and wallerian degeneration of myelin.
A substance poisonous to nerve tissue.
A type of granular leukocyte.
Pain-sensing
Fracture in which there is no deformity of the limb
Osteolytic and sometimes painful proliferative lesions composed of spindle (fibrous) cells
A broad group of chemically heterogeneous drugs that share important clinical and tissue effects: all have some analgesic, antipyretic, and anti-inflammatory activity. Includes aspirin, ibuprofen, indomethacin, naproxen, and others.
Failure of healing of a fracture or osteotomy. With continued motion through a nonunion, a pseudarthrosis will form
A region of the intervertebral disk that functions as a shock absorber against axial loads.
A fracture in which the fracture line crosses the bone diagonally
A developmental malformation that can lead to instability between C1 and C2; considered an absolute contraindication for contact sports.
Bursa in the elbow that separates the skin from the underlying ulna; allows the soft tissue to glide smoothly over the olecranon process
An open surgical procedure in which normal or near-normal relationships are restored to a fractured bone or dislocated joint
A procedure that involves incising the skin and soft tissue to repair a fracture under direct visualization
A class of drugs that includes heroin, morphine, and codeine.
The more fixed end or attachment of a muscle
Partial avulsion of the tibial tubercle because the tubercle is subjected to traction forces by the patellar tendon insertion; also known as tibial osteochondrosis.
Inflammation of the pubis symphysis.
An inflammatory condition of the pubic bones caused by repetitive stress on the symphysis pubis
A deterioration of the weightbearing surface; distinguished by destruction of the hyaline cartilage and narrowing at the joint space.
Cells that form new bone.
Injuries that disrupt articular cartilage and the underlying subchondral bone
A localized abnormality of a focal portion of the subchondral bone, which can result in loss of support for the overlying articular cartilage
Bone-resorbing cells.
The cells of established bone
A hereditary disorder of connective tissue caused by mutations in the gene for type I collagen
The organic matrix of bone; a protein framework composed of collagen that allows growth and remodeling.
A small, benign, but painful tumor usually found in the long bones or the posterior elements of the spine
Vertebral motion associated with range of motion; includes flexion, extension, rotation, and lateral flexion in the lumbar spine.
Dissolution of bone, particularly as resulting from excessive resorption
Infection of bone, either bacterial or mycotic
In lamellar bone, a concentric series of layers of mineralized matrix surrounding the central canal.
The death of bone, often as a result of obstruction of its blood supply
Bone fragility as the result of a low-calcium diet.
A painful inflammation of the periosteum or lining of bone.
Overgrowth of bone, common in osteoarthritis and spinal stenosis
Deterioration of bone tissue resulting in an increased risk of fracture as the result of a low-calcium diet.
A primary sarcoma of the bone that is characterized by the direct formation of bone or osteoid tissue by the tumor cells
The process of bony union, as in fracture healing. It is a biologic welding process that is sometimes facilitated with grafts of bone from the iliac crest and insertion of fixation devices
Literally, cutting a bone. Used to describe surgical procedures in which bone is cut and realigned
A principle that states that strength, power, endurance, and hypertrophy of muscles increase only if muscles perform workloads that are greater than those previously encountered.
Any injury caused by repetitive submaximal stress that surpasses the tissue's natural repair processes.
A condition of abnormally increased and disorganized bone remodeling
A sensory and emotional reaction precipitated by actual or anticipated injury; results from damage to tissue or nerves and is made worse by pressure or inflammation.
The anterior surface of the forearm, wrist, and hand
Osteonecrosis of the capitellum seen in teenagers
A proliferation of synovium beginning at the periphery of the joint surface as seen in rheumatoid arthritis
A raised lesion in the skin that is less than 1 cm in diameter.
A part of the autonomic nervous system that causes blood vessels to dilate, slows the heart rate, and relaxes muscle sphincters
A loose areolar tissue that surrounds the epitenon in tendons that move in a straight line and are capable of great elongation.
Abnormal sensations such as tingling, burning, or prickling
Infection of the folds of tissue along the edge of the nail.
Kneecap
An abnormally high patella.
A condition where the patella is 1 cm more inferior than that of the contralateral knee following a rupture of the quadriceps.
An avulsion of the unossified distal patella from a sudden forceful quadriceps contraction with the knee flexed.
A condition that results in pain and inflammation of the patella tendon; a common problem in jumping sports.
Surgical excision of the patella
Groove that runs anteriorly between the condyles of the femur; the patella lies in the trochlear groove
The joint between the patella and the femur.
Muscle tightness or imbalance resulting in lateral pulling of the patella and dull, aching knee pain and crepitus with range of motion.
A fracture caused by a normal load on abnormal bone, which is often weakened by tumor, infection, or metabolic bone disease
A bony ring, consisting of the sacrum, coccyx, and innominate bones, that connects the trunk to the lower extremities, supports the abdominal contents, and allows passage of the excretory canals
Insertion of pins into bone through small puncture wounds in the skin for stabilization of a fracture or a dislocated joint that was realigned by closed reduction.
A connective tissue that covers individual fascicles.
A sleeve of connective tissue that surrounds the shaft of the bone and contributes to fracture healing
Inflammation of the periosteum.
The location of excessive body fat resulting in a pear shape; not associated with serious cardiovascular complications.
Inflammation of the tendon sheath, marked by pain, swelling, and, occasionally, local crepitus
A structure composed of the epitenon and the paratenon.
Contamination of the peritoneum or peritoneal cavity by the bacteria-laden contents of a ruptured bowel.
A classification of injuries that includes tendinitis, acute and chronic dislocations, longitudinal tears, and tendon ruptures.
The process by which white blood cells ingest debris or microorganisms
Bones making up the finger bones (three in each finger and two in the thumb).
The transdermal introduction of a topically applied medication (usually either an anti-inflammatory or analgesic) into soft tissue using ultrasound
The administration of medication through the skin by ultrasound.
The growth plate. Specialized cartilaginous tissue interposed between the metaphysis and epiphysis in long bones in children. Provides growth in length of the bone.
A proliferative process of the synovial membrane of unknown etiology
The sole, or flexor surface, of the foot
Irritation of the plantar fascia at its insertion on the plantar aspect of the heel; a common cause of inferior heel pain.
Flattening of the arch of the foot
A portable therapeutic modality that uses electrical stimulation to attempt to modulate pain, strengthen muscles, and enhance soft-tissue healing
The posterior division of the vertebral column that includes the facet joints on either side of the arch and the posterior spinous process.
Disruption of the glenohumeral joint in a posterior direction
That part of each vertebra that can be palpated, as it lies just under the skin in the midline of the back
Disruption of the sternoclavicular joint posteriorly
Pain along the posterior medial border of the tibia; thought to be secondary to a tight posterior tibial muscle "pulling" on the periosteum in this area; associated with running
The lateral tibial plateau rotates posteriorly in relationship to the femur
A form of secondary osteoarthritis caused by a loss of joint congruence and normal joint biomechanics
A physical examination held prior to participation in an organized sport that can lay a foundation for the team physician and athletic trainer in an