CCEP Extremity Anatomy 2 — Questions and Answers
Question 1: Which nerve passes through the cubital tunnel at the elbow and is most vulnerable to compression there?
- Median nerve
- Radial nerve
- Ulnar nerve (Correct answer)
- Musculocutaneous nerve
Correct answer: Ulnar nerve
The ulnar nerve passes posterior to the medial epicondyle through the cubital tunnel, making it highly susceptible to entrapment and compression.
Question 2: The anatomical snuffbox is bordered radially by which tendon?
- Extensor pollicis brevis
- Abductor pollicis longus
- Extensor pollicis longus (Correct answer)
- Flexor pollicis longus
Correct answer: Extensor pollicis longus
The ulnar (medial) border of the anatomical snuffbox is formed by the extensor pollicis longus tendon, while the radial border is formed by abductor pollicis longus and extensor pollicis brevis.
Question 3: Which of the following is the primary stabilizer of the distal radioulnar joint (DRUJ)?
- Annular ligament
- Triangular fibrocartilage complex (TFCC) (Correct answer)
- Interosseous membrane
- Dorsal radiocarpal ligament
Correct answer: Triangular fibrocartilage complex (TFCC)
The triangular fibrocartilage complex (TFCC) is the primary stabilizer of the distal radioulnar joint and also distributes load across the ulnar side of the wrist.
Question 4: The lateral compartment of the leg contains which muscles?
- Tibialis anterior and extensor hallucis longus
- Peroneus longus and peroneus brevis (Correct answer)
- Gastrocnemius and soleus
- Tibialis posterior and flexor digitorum longus
Correct answer: Peroneus longus and peroneus brevis
The lateral compartment of the leg contains the peroneus (fibularis) longus and peroneus brevis, both innervated by the superficial peroneal nerve.
Question 5: Which bone of the foot articulates with both the talus proximally and the navicular distally?
- Calcaneus
- Cuboid
- Navicular
- No bone — the talus articulates directly with the navicular (Correct answer)
Correct answer: No bone — the talus articulates directly with the navicular
The talus articulates directly with the navicular anteriorly; there is no interposed bone between them — the talonavicular joint is part of the transverse tarsal joint.
Question 6: The coracohumeral ligament primarily limits which motion of the glenohumeral joint?
- Anterior translation
- External rotation in adduction (Correct answer)
- Superior translation
- Internal rotation
Correct answer: External rotation in adduction
The coracohumeral ligament, running from the coracoid process to the greater and lesser tubercles, is a primary restraint to external rotation when the arm is adducted.
Question 7: Which tarsal bone is entirely covered by articular cartilage on five of its six surfaces?
- Navicular
- Cuboid
- Talus (Correct answer)
- Calcaneus
Correct answer: Talus
The talus is unique in that approximately 60–70% of its surface is covered by articular cartilage, and it has no direct muscular attachments.
CCEP Extremity Anatomy 2
Which nerve passes through the cubital tunnel at the elbow and is most vulnerable to compression there?