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Ulnar Nerve Injury: High vs Low PalsyHigh ulnar palsy (cubital tunnel syndrome at elbow):Weakness in flexion of 4th and 5th fingersParalysis of interossei and medial two lumbricals (ulnar claw hand)Hypothenar muscle atrophySensory loss in medial 1.5 fingers (anterior and posterior)Low ulnar palsy (wrist -Guyon's canal syndrome):Pins and needles in medial 1.5 fingersLater loss of motor functionCommon in cyclists
