Neural variations of the brachium constitute an important anatomical and clinical entity. Although frequently reported, if accompanied by other anomalies, they deserve special mention in anatomical literature. The nerves of the extremities are especially vulnerable to injury because of their long course and superficial distribution. The variations of the median nerve and the musculocutaneous nerve, like the communication between the two, may prove valuable in the traumatology of the shoulder joint. It may also be correlated to the entrapment syndromes of the musculocutaneous nerve in which a part of the median nerve also passes through the coracobrachialis and may exhibit the symptoms similar to those encountered in the median nerve neuropathy as in the carpal tunnel syndrome. In the present case, in the right upper limb of a 60 year old male, the musculocutaneous nerve after its origin from lateral cord gave a branch to corachobrachialis muscle and then fused completely with median nerve. Later then supplied the other two muscles of the front of forearm, i.e. biceps brachii and brachialis and the lateral cutaneous nerve of arm. Its ontogeny, phylogeny and clinical implications are discussed in detail. A lack of awareness of variations with different patterns might complicate surgical repair and may cause ineffective nerve blockade.