Unusual variation in the brachial plexus root, trunk, division, cord & branches are more common and have been reported by different authors. This type is variation arise due to embryological aspect. The lateral root from lateral cord and medial root from medial cords of brachial plexus unite to form the median nerve. The present report describes a case of variation of the median nerve observed in the unilateral right upper limb of male cadaver during routine dissection in Department of Rachana Shareera, Patanjali Ayurveda Medical College & Research Centre, Dhulikhel, where the median nerve was found to be formed by three roots. In the present case one extra root arising from the posterior cord that unite with the median nerve approximately 3.2 cm below the union of lateral and medial root of median nerve. Knowledge of anatomical variation in the brachial plexus and nerve arising from them in axillary region is important for anatomist, surgeon, orthopedics, anesthesiologist, physiotherapist, sport medicine, neurophysicians etc. as these nerves are more susceptible to be injured during sport injuries, surgical interventions etc.

Keywords : Axilla, Plexus, Root, Cord, Median Nerve, Etc.