Q.

With respect to the thenar muscles:

A. abductor pollicis brevis inserts into the base of the distal phalanx of the thumb
B. all arise from the flexor retinaculum
C. flexor pollicis brevis is usually supplied by a branch from the ulnar nerve
D. abductor pollicis brevis has no role in opposition of the thumb
E. opponens pollicis is the most superficial muscle of the group
Answer» B. all arise from the flexor retinaculum
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