A. Thoracic outlet impingement
B. Palsy of ulnar nerve
C. Carpal tunnel syndrome
D. Tenosynovitis
Answer B
E1. Froment’s sign tests for palsy of the ulnar nerve, especially the actions of the thumb muscle- adductor pollicis
E2. With palsy of the ulnar nerve, the individual will not be able to hold an object with his thumb
E3. The injury is then compensated by flexion of the DIP joint of the thumb
E4. The flexion of the thumb is controlled by flexor pollicus longs which is innervated by the anterior interosseous branch of the median nerve
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