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Ulnar nerve typically supplies the intrinsic muscles of the hand. Hence the tests for ulnar nerve are based on the functions performed by these muscles.

The intrinsic muscles or interossei are concerned with gripping function of the fingers. So things like holding a card or cigarette between 2 fingers is with the help of these muscles.

A generalized loss of coordination of hands causing clumsy hands is often seen with ulnar nerve diseases or palsy.

Tests like, froment's sign, card test, and so on, are used for evaluation of ulnar nerve injury.

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Q: Ulnar nerve test for loss of function?
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