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A member asked:
Why can you not extend the dip and pip joints of the finger due to ulnar nerve lesion?
A doctor has provided 1 answer
Ulnar nerve: Is responsible for abduction (spreading your fingers and extension of the 4-5th fingers. It also provides sensation to that area if you have a lesion in the nerve the signal from the nerve will not get to those muscles.
Answered 2/20/2014
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