Ulnar nerve usually is a branch of the medial cord of brachial plexus. In a study conducted on 20 upper limbs, variation in its origin was observed in one right upper limb. Ulnar nerve had two roots of origin, one arising from the medial cord and another from the lateral cord. The rest of the course of the ulnar nerve was as usual. In another left upper limb a communicating branch was observed between the musculocutaneous nerve and median nerve. This type of variation would be important while planning surgery in the region of axilla or arm as these nerves is more liable to be injured during operations.
Paper No:
116
