CCEP Anatomy & Biomechanics of Extremities 4

Question 1

During closed-chain pronation of the foot, what obligatory motion occurs at the tibia?

Accepted Answer

Internal rotation

Answer

Closed-chain subtalar pronation causes obligatory internal rotation of the tibia, which in turn stresses the knee and hip in a predictable kinetic chain.

Question 2

The 'unhappy triad' (O'Donoghue's triad) of the knee classically involves injury to which three structures?

Accepted Answer

ACL, MCL, and medial meniscus

Answer

The classic unhappy triad involves the ACL, MCL, and medial meniscus, typically from a valgus contact force applied to a planted foot.

Question 3

Which muscle is the primary supinator of the forearm when the elbow is extended?

Accepted Answer

Supinator

Answer

With the elbow extended, the biceps brachii has a poor mechanical advantage, making the supinator muscle the primary supinator of the forearm.

Question 4

The hip joint's close-packed position (maximum congruency and ligamentous tension) occurs in which position?

Accepted Answer

Flexion, abduction, and external rotation

Answer

The close-packed position of the hip is full extension combined with slight abduction and internal rotation, where the ligaments are most taut.

Question 5

The pes anserinus is the conjoined insertion of which three muscles at the proximal medial tibia?

Accepted Answer

Sartorius, gracilis, and semitendinosus

Answer

The pes anserinus ('goose's foot') is formed by the conjoined tendons of the sartorius, gracilis, and semitendinosus inserting on the proximal medial tibial shaft.

(CCEP) Certified Chiropractic Extremity Practitioner Practice Test

(CCEP) Certified Chiropractic Extremity Practitioner Practice Test

CCEP Anatomy & Biomechanics of Extremities 4