CCEP Anatomy & Biomechanics of Extremities 5

Question 1

The acromioclavicular joint is reinforced primarily by which ligaments that provide vertical and horizontal stability respectively?

Accepted Answer

Coracoclavicular and acromioclavicular ligaments

Answer

The coracoclavicular ligaments (trapezoid and conoid) provide vertical stability, while the acromioclavicular ligaments provide horizontal (anteroposterior) stability.

Question 2

The Q-angle of the knee is measured between the line of pull of the quadriceps and which other line?

Accepted Answer

The line from the tibial tubercle through the center of the patella to the ASIS

Answer

The Q-angle is the angle between the quadriceps force vector (ASIS to patellar center) and the patellar tendon line (patellar center to tibial tubercle); normal is approximately 10–18°.

Question 3

The interosseous membrane of the forearm primarily transfers axial loads from which bone to which bone?

Accepted Answer

Radius to ulna (proximal to distal)

Answer

The fibers of the interosseous membrane run obliquely, transferring compressive loads from the radius (which receives ~80% of wrist forces) proximally to the ulna.

Question 4

Which extensor tendon compartment of the wrist contains the extensor pollicis longus, and its abrupt change in direction around Lister's tubercle predisposes it to what complication?

Accepted Answer

Third compartment; spontaneous rupture

Answer

The EPL occupies the third compartment and wraps around Lister's tubercle, which acts as a pulley; this sharp change in direction can cause attritional or spontaneous rupture.

Question 5

When assessing ankle dorsiflexion range of motion with the knee extended versus knee flexed, a restriction only with knee extended suggests tightness in which structure?

Accepted Answer

Gastrocnemius muscle

Answer

Because the gastrocnemius crosses the knee joint, dorsiflexion restriction that improves when the knee is flexed (taking tension off the gastrocnemius) indicates gastrocnemius, not soleus, tightness.

(CCEP) Certified Chiropractic Extremity Practitioner Practice Test

(CCEP) Certified Chiropractic Extremity Practitioner Practice Test

CCEP Anatomy & Biomechanics of Extremities 5