Anatomy & Biomechanics of Extremities Flashcards
7 cards from real CCEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Anatomy & Biomechanics of Extremities flashcards as text
The flexor retinaculum of the ankle forms the roof of the tarsal tunnel; which nerve passes through this tunnel?
Answer: Posterior tibial nerve
The tarsal tunnel contains the posterior tibial nerve (along with the posterior tibial artery and flexor tendons), which divides into medial and lateral plantar nerves distally.
The 'screw-home mechanism' of the knee involves which motion occurring at full extension?
Answer: External rotation of the tibia
As the knee reaches full extension, the tibia externally rotates (or the femur internally rotates) to lock the joint in the close-packed position.
Which muscle of the rotator cuff contributes most to humeral head depression during overhead elevation?
Answer: All three — infraspinatus, teres minor, subscapularis equally
The infraspinatus, teres minor, and subscapularis collectively depress the humeral head and counteract the superior shear of the deltoid during elevation.
The proximal radioulnar joint is classified as which type of synovial joint?
Answer: Pivot
The proximal radioulnar joint is a pivot (trochoid) joint where the radial head rotates within the annular ligament and the radial notch of the ulna.
Tension in the plantar fascia increases with which motion and protects the medial longitudinal arch through the 'windlass mechanism'?
Answer: Dorsiflexion of the first MTP joint
Dorsiflexion of the first MTP joint tightens the plantar fascia like a windlass, raising the medial longitudinal arch and supinating the foot for push-off.
The deltoid ligament of the ankle is a strong medial stabilizer; which component primarily resists talar abduction and eversion?
Answer: Tibiocalcaneal part of the deltoid
The tibiocalcaneal part of the deltoid ligament is the strongest and most important component resisting eversion and abduction of the talus.
Which bony landmark is the insertion of the iliotibial band?
Answer: Gerdy's tubercle
The iliotibial band inserts at Gerdy's tubercle on the anterolateral proximal tibia, and its friction over the lateral femoral epicondyle causes IT band syndrome.