Gross Anatomy Block 2 Practice Test

Which muscle is part of the hypothenar group?

Abductor digiti minimi Abductor pollicis brevis Opponens pollicis First dorsal interosseous

Correct Answer:

Abductor digiti minimi

Explanation:

The hypothenar muscles are the group on the little-finger side of the palm. Abductor digiti minimi is one of these, and it mainly functions to abduct the little finger at the metacarpophalangeal joint, helping move it away from the other fingers. The other two muscles listed belong to a different group: abductor pollicis brevis and opponens pollicis are part of the thenar eminence that controls the thumb, and the first dorsal interosseous is a muscle between the metacarpals (not in the hypothenar group). Innervation for the hypothenar muscles is via the deep branch of the ulnar nerve, which aligns with their motor role in fine little-finger movements.

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