Muscles Actions, Origins & Insertions Practice Test

Which action is performed by the Flexor Carpi Ulnaris?

Flexion and adduction at the wrist Extension at the wrist Extension and abduction at the wrist Inspiration

Correct Answer:

Flexion and adduction at the wrist

Explanation:

Flexor Carpi Ulnaris mainly pulls the hand toward the ulna (ulnar deviation) while also bending the wrist. Its fibers run from the medial epicondyle and the ulna to the pisiform, hook of hamate, and base of the 5th metacarpal, so as it contracts it directs the pull toward the little finger side of the hand and toward the palm, producing both wrist flexion and adduction. So the action matches flexing the wrist and bringing the hand medially, which is why that option is correct. The other choices describe extending the wrist, or moving it away from the ulna (abduction), or unrelated action like inspiration, none of which align with the muscle’s primary pull.

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