The Nerves of the Upper Limb are provided by the Brachial Plexus (formed by ventral rami of C5 to C8 and T1 spinal nerves). There are five main branches of brachial plexus are, they are namely – axillary, musculocutaneous, median, ulnar, and radial nerves.

  • The musculocutaneous, median, and ulnar nerves supply the muscles of anterior (flexor) compartments of the arm and forearm.
  • The radial nerve supplies the muscles of the posterior (extensor) compartments of the arm and forearm.
  • All the intrinsic muscles of the hand are supplied by the ulnar nerve except muscles of thenar eminence and first two lumbricals.