Full Nerves of the Arm and Hand Description [Continued from
above] . . . are sent from various parts of the brain and spinal
cord; some come from sense organs located in the joints,
ligaments, and tendons; and some come from the muscles
themselves. The nerves of the arm and hand include the brachial
plexus, musculocutaneous, radial, median, and ulnar. The
brachial plexus allows, for the most part, the whole upper limb
to invert. It is actually a nerve fiber network that runs from
the spine, along the neck and armpit area, and then enters the
arm. The musculocutaneous nerve also starts in the spine and
works its way throughout the arm’s lateral side. The radial
nerve supplies muscles on the back of the arms and the skin of
the forearms and hands. The median nerve passes down the full
length of the arm into the hand. It's a branch of the brachial
plexus and is one of the main nerves in the arm. It is
responsible for controlling the forearm and hand muscles. It
also enables the rotation of the forearm palm-inwar