Tennis Elbow Anatomy
To better understand lateral epicondylitis, it helps to understand the anatomy of the elbow.
The elbow is made up of three bones: the humerus, radius and ulna. The two prominent areas of the humerus on the inside and outside of the elbow are referred to as the epicondyles. The muscles that raise the wrist and hand attach to the lateral epicondyle. Overuse of these muscles can cause inflammation in this area.
Examples of elbow anatomy:
- Borkholder CD, Hill VA, Fess EE. The efficacy of splinting for lateral epicondylitis: a systematic review. J Hand Ther. 2004 Apr-Jun;17(2):181-99. 
- Lewis M, Hay EM, Paterson SM, Croft P. Local steroid injections for tennis elbow: does the pain get worse before it gets better?: Results from a randomized controlled trial. Clin J Pain. 2005 Jul-Aug;21(4):330-4. 
- Smidt N, Assendelft WJ, van der Windt DA, Hay EM, Buchbinder R, Bouter LM. Corticosteroid injections for lateral epicondylitis: a systematic review. Pain. 2002 Mar;96(1-2):23-40. 
- Trudel D, Duley J, Zastrow I, Kerr EW, Davidson R, MacDermid JC. Rehabilitation for patients with lateral epicondylitis: a systematic review. J Hand Ther. 2004 Apr-Jun;17(2):243-66.