Lower Leg, Ankle, Foot, and Knee Region Rehabilitation

Vocabulary practice flashcards covering anatomical terminology, biomechanics, joint classifications, pathologies, deformities, and diagnostic signs of the knee region, lower leg, ankle, and foot.

Chopart Joint

The midtarsal joints (also called the Surgeon's Joint) located between the talonavicular and calcaneocuboid articulations.

Lisfranc Joint

The tarsometatarsal plane synovial joints of the foot that allow gliding movements.

Talocrural Joint

A uniaxial, modified hinge synovial joint formed by the tibia, fibula, and talus, with a resting position of $10^\circ$ plantar flexion midway between inversion and eversion.

Deltoid Ligament

The four-part medial collateral ligament of the talocrural joint, composed of the anterior talotibial, posterior talotibial, calcaneotibial, and tibionavicular ligaments.

Subtalar Joint

A synovial joint with three degrees of freedom between the talus and calcaneus; its proprioceptive center is mediated through the interosseous talocalcaneal ligament within the sinus tarsi.

Plantar Aponeurosis

A thick connective tissue band serving as an attachment for intrinsic foot muscles that provides shock absorption during initial contact and aids propulsion via the Windlass effect.

Flexor Retinaculum of the Ankle

A fibrous band extending from the medial malleolus to the medial calcaneus that covers the tibial nerve, posterior tibial vessels, and deep flexor tendons ("Tom, Dick, And Very Nervous Harry").

Chronic Exertional Compartment Syndrome (CECS)

A disorder characterized by chronically elevated intracompartmental pressure leading to reversible ischemic episodes and pain during exercise that diminishes after cessation of activity.

Acute Compartment Syndrome

A limb-threatening surgical emergency characterized by acutely elevated intracompartmental tissue pressure, venous obstruction, tissue necrosis within $4\text{ to }8\text{ hours}$, and severe pain upon passive long muscle stretching.

Medial Tibial Stress Syndrome (MTSS)

An overuse traction periostitis (shin splints) occurring at the periosteal-fascial junction of the medial tibia, most commonly at the attachment of the soleus muscle, with hyperpronation being the chief predisposing factor.

Tibiofibular Syndesmosis Injury

A high ankle sprain caused by hyperdorsiflexion and forceful eversion that damages the anterior tibiofibular, posterior tibiofibular, transverse tibiofibular, and interosseous ligaments.

Anterolateral Ankle Impingement

Mechanical entrapment of a triangular soft tissue mass composed of adipose and synovial tissue along the anterior margin of the tibiotalar joint in terminal dorsiflexion.

Dancer's Tendonitis

Tenosynovitis or inflammation of the flexor hallucis longus (FHL) tendon resulting from repetitive push-off maneuvers.

Haglund's Deformity

An enlargement of the posterosuperior tuberosity of the calcaneus (commonly termed "pump bump") that causes friction and retrocalcaneal bursitis.

Hindfoot Varus

Inversion of the calcaneus when the subtalar joint is in neutral position, producing a mildly rigid rearfoot with limited pronation.

Hindfoot Valgus

Eversion of the calcaneus when the subtalar joint is in neutral position, resulting in a mobile rearfoot that leads to excessive pronation and limited supination.

Forefoot Varus

Midtarsal joint inversion of the forefoot on the hindfoot when the subtalar joint is neutral, occurring because the normal valgus tilt of the talar head and neck was not achieved.

Forefoot Valgus

Midtarsal joint eversion of the forefoot on the hindfoot when the subtalar joint is neutral, occurring when the normal valgus tilt ($35^\circ\text{ to }45^\circ$) of the talar head and neck has been exceeded.

Metatarsus Adductus

The most common congenital foot deviation in children, characterized by an adducted and supinated forefoot ("hooked forefoot").

Pes Cavus

A rigid, high-arched foot deformity characterized by accentuated longitudinal arches and dropping of the forefoot on the hindfoot at the tarsometatarsal joints.

Pes Planus

A flatfoot deformity characterized by a dropped medial longitudinal arch and a mobile foot structure, considered normal in children up to $2\text{ years}$ of age.

Splay Foot

Broadening of the forefoot resulting from weakness of the intrinsic foot muscles and intermetatarsal ligaments, accompanied by a dropped anterior metatarsal arch.

Talipes Equinus

A limitation of dorsiflexion (less than $10^\circ$) at the talocrural joint resulting from contracture of the gastrocnemius, soleus, or Achilles tendon.

Rocker-Bottom Foot

A "broken midfoot" deformity in which the forefoot is dorsiflexed on the hindfoot.

Morton's Neuroma

Perineural fibrosis and enlargement resulting from chronic irritation and degeneration of the distal interdigital nerves, occurring most commonly in the third intermetatarsal space.

Turf Toe

A hyperextension sprain of the first metatarsophalangeal (MTP) joint of the hallux combined with compressive loading.

Hallux Valgus

Lateral deviation of the first toe exceeding $20^\circ$ relative to the first metatarsal, frequently leading to bunion formation.

Hallux Rigidus

Degenerative osteoarthritis of the first metatarsophalangeal (MTP) joint presenting with pain, osteophyte formation, and joint stiffness.

Hammer Toes

A deformity defined by an extension contracture at the metatarsophalangeal (MTP) joint combined with a flexion contracture at the proximal interphalangeal (PIP) joint.

Claw Toes

A toe deformity characterized by hyperextension at the metatarsophalangeal (MTP) joint and flexion of both interphalangeal joints (PIP and DIP), often linked to intrinsic muscle weakness.

Mallet Toes

A deformity presenting with isolated flexion at the distal interphalangeal (DIP) joint while maintaining normal alignment at the PIP and MTP joints.

Plantar Fasciitis

Degenerative irritation of the plantar fascia origin at the medial calcaneal tuberosity characterized by an absence of inflammatory cells and sharp pain during the first morning steps.

Screw Home Mechanism

The terminal rotation locking mechanism of the knee during the final $20^\circ$ of extension, in which the tibia externally rotates $20^\circ$ on a fixed femur in open chain, unlocked by the popliteus.

Odd Facet of the Patella

The most medial patellar ridge that engages the medial femoral condyle only at $135^\circ$ of extreme flexion; the most common site involved in chondromalacia patellae.

Housemaid's Knee

Bursitis involving the prepatellar bursa situated between the skin and the anterior surface of the patella; the most commonly damaged bursa in the knee region.

Vicar's Knee

Bursitis involving the superficial or subcutaneous infrapatellar bursa located between the skin and the tibial tuberosity.

Medial Meniscus

A "C"-shaped, less mobile, firmly anchored fibrocartilage ring attached to the deep layer of the medial collateral ligament, which is injured three times more often than the lateral meniscus.

Lateral Meniscus

An "O"-shaped, highly mobile fibrocartilaginous structure of the knee joint that is less anchored and less frequently torn than the medial meniscus.

Meniscotibial (Coronary) Ligaments

Capsular ligaments that anchor the inferior peripheral borders of the menisci directly to the tibial condyles to ensure joint congruency.

Anterior Cruciate Ligament (ACL)

An intracapsular knee ligament that courses superiorly, posteriorly, and laterally (SPL) from the anterior tibia to insert on the posterior part of the medial surface of the lateral femoral condyle.

Posterior Cruciate Ligament (PCL)

An intracapsular knee ligament running superiorly, anteriorly, and medially (SAM) from the posterior intercondylar fossa of the tibia to insert on the lateral surface of the medial femoral condyle.

Unhappy Triad of O'Donoghue

A catastrophic combined knee injury resulting from a valgus stress to a flexed, rotated knee, consisting of tears to the anterior cruciate ligament (ACL), medial collateral ligament (MCL), and medial meniscus.

Bone-Patella-Bone (BTB) Graft

The gold-standard ACL reconstruction autograft harvested from the middle third of the patellar tendon with attached patellar and tibial bone plugs.

Double Semitendinosus and Gracilis Graft (DSTG)

A four-strand autologous hamstring tendon graft used for ACL reconstruction that requires smaller incisions and causes less quadriceps atrophy than patellar tendon grafts.

Iliotibial Band Friction Syndrome

An overuse friction condition producing pain over the lateral femoral condyle as the iliotibial band repeatedly crosses the bony epicondyle at approximately $30^\circ$ of knee flexion.

Plica Syndrome

A condition in which embryonic synovial folds fail to reabsorb normally, resulting in symptomatic peripatellar tissue thickening that can mimic meniscal pathology.

Jumper's Knee

Patellar tendinitis resulting from repetitive high eccentric quadriceps loading, with symptoms localized most frequently to the inferior pole of the patella.

Osteochondritis Dissecans (Knee)

A localized area of avascular necrosis in subchondral bone resulting in subchondral separation, most commonly involving the medial femoral condyle in adolescents.

Osgood-Schlatter Disease

A traction apophysitis or partial avulsion of the tibial tubercle from the patellar tendon, occurring most often in boys aged $10\text{ to }14\text{ years}$.

Sinding-Larsen-Johansson Disease

A traction apophysitis located at the distal/inferior pole of the patella caused by excessive force exerted by the patellar tendon during knee flexion.

Pellegrini-Stieda Disease

Post-traumatic calcification or ossification of the superior attachment of the medial collateral ligament (MCL) following a Stieda fracture.

Bipartite Patella

A developmental variant present in roughly $2\%$ of adults in which an accessory ossification center fails to fuse, most commonly at the superolateral pole.

Baker's Cyst

A popliteal synovial cyst formed by herniation of synovial tissue through a defect in the posterior capsule, typically distending between the medial gastrocnemius head and semimembranosus tendon.

Blount's Disease

A progressive bow-leg (genu varum) deformity in overweight children of Negroid descent caused by abnormal growth and disturbed ossification of the posteromedial proximal tibia.

Quadriceps Angle (Q-Angle)

The angle formed between a line from the ASIS to the patellar midpoint and a line from the patellar midpoint to the tibial tuberosity, normally measuring $11^\circ\text{ to }15^\circ$ in males and $>20^\circ$ in females.

Camel Sign

A clinical sign of patella alta observed at $30^\circ$ of knee flexion displaying two visible anterior humps: a superior hump formed by the high-riding patella and an inferior hump formed by Hoffa's infrapatellar fat pad.

Miserable Malalignment Syndrome

A lower extremity postural alignment complex comprising increased femoral anteversion, increased Q-angle, patella alta, genu valgum, compensatory external tibial torsion, and subtalar pronation.