QUESTIONS
1. In which of the following conditions would a patient most likely sustain an injury to the flexor pollicis longus muscle?
A) Trivial hand lacerations
B) Fractures resulting from falls on an outstretched hand
C) Traction injuries causing avulsion of the thumb metacarpal bone
D) Penetrating stab wounds to the anterior aspect of the wrist
2. What is the most likely cause of a closed proximal ulnar fracture in a healthy adult?
A) An axial-loading mechanism.
B) External rotation deformity.
C) Hyperextension of the elbow.
D) Ulnar deviation of the wrist.
3. What is carpal tunnel syndrome?
A) Impingement of the ulnar nerve under the flexor retinaculum.
B) Compression of the median nerve in its passage through the flexor retinaculum.
C) Narrowing of the space beneath the annular ligament.
D) A compression injury of the radial nerve.
4. What is the most common nerve injured in elbow dislocations?
A) Axillary
B) Ulnar
C) Radial
D) Median
5. Which of the following structures are at risk for injury during a fracture-dislocation of the elbow?
A) Radial nerve
B) Brachial artery
C) Ulnar nerve
D) Median nerve
ANSWERS:
1. B) Fractures resulting from falls on an outstretched hand
2. A) An axial-loading mechanism.
3. B) Compression of the median nerve in its passage through the flexor retinaculum.
4. C) Radial
5. All of the above