Innervation of the wrist, and knee joint have been well described and have led to surgical approaches to treat pain in these joints when other approaches have failed or when the pain is of neural origin. Wilhem in 1962 described the innervation of the lateral elbow joint, but his line drawings of the innervation did not permit adoption of a plan for surgical intervention that has been uniformly accepted. Ten fresh frozen arms were dissected utilizing 4.0 loupe magnification to identify innervation of the lateral humeral epicondyle. We identified a consistent lateral epicondyle innervation from the posterior cutaneous nerve of the forearm. The nerve originates at the posterolateral mid-humeral level from the radial nerve. Along its path, it branches about 5-8 cm above lateral epicondyle into anterior and posterior branches. The former one continues towards posterolateral forearm skin, while the posterior one provides innervation to lateral epicondyle. In one specimen, the nerve branched distal to the elbow, so the epicondyle was innervated with a branch from this main trunk. Another source of innervation of this joint is a branch from the motor branch to the brachioradialis. This would require intra-operative nerve stimulation to identify the patient, and could not be reliably identified on cadaver dissection from among the many branches that go the brachioradialis muscle. It is concluded from this study that the uniform innervation of the lateral humeral epicondyle from branches of the posterior cutaneous nerve of the forearm and the radial nerve at its motor innervation of the brachioradialis permit design of a surgical approach that should permit denervation of this joint.