Nerves of the Anterior & Posterior Compartments of the Arm

There are three nerves that enter the anterior compartment: 1) musculocutaneous, 2) median and 3) ulnar. The musculocutaneous nerve is the nerve that supplies the 3 muscles of this compartment but the other 2 nerves are merely passing through to perform their functions in the forearm and hand.

The posterior compartment of the arm is supplied by the radial nerve. It then continues into the posterior group of forearm muscles to supply them.

Veins of the Arm Cubital Fossa