Case Report: Formation of Median Nerve by Three Roots

Atypical connections in the formation of the brachial plexus are prevalent and have been reportedin different articles. the present report describes a case of variation of the median nerve observedin the iranian male cadaver during routine trial dissection. there are three roots for median nerve.median nerve is formed by joining two lateral and medial cords of brachial plexus. third root ofmedian nerve which is carried by musculocutaneous nerve 3 cm of coracobrachialis muscle andthen it is separated from musculocutaneous nerve but instead of joining median nerve, it piercescoracobrachialis muscle and outs from a place near entrance point and joins median nerve inmiddle arm and normally passes the rest of its passage. it is important for medical staff to be awareof this variation while planning a surgery in the region of axilla or arm, as these nerves are moresusceptible to be injured during operations.