Abstract
In normal individuals the Musculocutaneous nerve is terminal branch of the lateral cord of the brachial plexus. During routine dissection conducted for undergraduates study in the Department of Anatomy, Tehran medical college, the Musculocutaneous nerve was found variation and two roots of median nerve have united and median nerve innervated muscles in one adult Iranian woman cadaver. In others words, Variations in the origins and distributions of the brachial plexus had been documented by previous researcher. Variations in the origin course, branching pattern, termination and connection of the Musculocutaneous nerve are not uncommon. Knowledge of these variations is important to the anatomist, orthopaedicans, neurologist and anesthetist.
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