Anatomical variation in the formation of median nerve - A case report.

During routine dissection of an adult male cadaver in the Department of Anatomy, Prathima institute of medical sciences, Kariminager, India, the right median nerve was found to be formed by four roots .The finding was noted after thorough and meticulous dissection of the upper limbs of both sides (axilla, arm, forearm and palm).Out of the four roots forming the anomalous median nerve, three were from lateral cord and one from medial cord of brachial plexus.However, the distribution of the anomalous median nerve was normal in arm, forearm and palm.The arterial pattern in the arm (axillary and brachial arteries) was also normal.