Additional root of median nerve: A case report.

ABSTRACT

Anomalies of the brachial plexus and its terminal branches are common. During routine dissection in an adult male cadaver in the right upper limb a rare variation in the formation of median nerve was observed. Median nerve was formed by three roots, one from medial cord and two from lateral cord of brachial plexus. The additional root originated from lateral cord 3 cm below the lateral root and had an oblique course in front of axillary artery and joined with the median nerve in the upper third of arm. However, the distribution of the anomalous median nerve was normal in arm, forearm and palm and arterial pattern was also normal. Presence of additional lateral root of median nerve though rare is of great academic and clinical significance in Orthopedics, Anaesthesiology, Sports medicine and Physiotherapy.