Your patient had trauma to the ulnar nerve and cannot actively abduct and adduct her fingers.You note weakness of which of the following muscles as a result of this?

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Quizplus · Accepted Answer

The dorsal and palmar interossei are responsible for abduction and adduction of the fingers, and are innervated by the ulnar nerve. Weakness of these muscles would result in the inability to abduct and adduct the fingers. The lumbricales are responsible for flexion of the MCP joint and extension of the PIP and DIP joints, while the opponens digiti minimi and flexor digiti minimi are responsible for opposition and flexion of the fifth digit, respectively, and are not directly involved in finger abduction and adduction.

Your Patient Had Trauma to the Ulnar Nerve and Cannot