Aim to study the variations in the muscles and nerves in the arm. 100 upper limbs of 50 donated embalmed cadavers (45 males & 5 females) of age group ranging from 70 to 80 years were dissected in the department of Anatomy at K. J. Somaiya Medical College, Sion, Mumbai, INDIA. The variations in the muscles and nerves in the arm were observed in 2 specimens. The vascular pattern in the arm was also observed. The photographs of the variation of the formation of median nerve were taken for proper documentation. The variations in the muscles and nerves in the arm was observed in 2 specimens. The median nerve was found passing through supernumerary head of biceps brachii muscle. The short and long heads have their normal origin, supernumerary head had originated from the anteromedial surface of the superior part of the shaft of the humerus. The common tendon then got inserted into the posterior rough part of the radial tuberosity. The knowledge of such variations is important for anatomists and clinicians especially for plastic surgeons in flap surger.