Lateral epicondyle of the humerus

The lateral epicondyle of the humerus is a large, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow joint, and to a tendon common to the origin of the supinator and some of the extensor muscles. Specifically, these extensor muscles include the anconeus muscle, the supinator, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris.^[1] In birds, where the arm is somewhat rotated compared to other tetrapods, it is termed dorsal epicondyle of the humerus. In comparative anatomy, the term ectepicondyle is sometimes used.^[2]

Lateral epicondyle of the humerus
The supinator. (Lateral epicondyle labeled at upper right.)
Left elbow-joint, showing posterior and radial collateral ligaments. (Lateral epicondyle visible at center.)
Details
Identifiers
Latin	epicondylus lateralis humeri
TA98	A02.4.04.029
TA2	1209
FMA	23442
Anatomical terms of bone [edit on Wikidata]

A common injury associated with the lateral epicondyle of the humerus is lateral epicondylitis also known as tennis elbow. Repetitive overuse of the forearm, as seen in tennis or other sports, can result in inflammation of "the tendons that join the forearm muscles on the outside of the elbow. The forearm muscles and tendons become damaged from overuse. This leads to pain and tenderness on the outside of the elbow."^[3]

See also

• Medial epicondyle of the humerus
• Common extensor tendon
• Tennis elbow (lateral epicondylitis)

Additional images

• 
  Right lateral epicondyle colored in red
• 
  Left humerus. Anterior view.
• 
  Plan of ossification of the humerus.
• 
  Posterior surface of the forearm. Superficial muscles.
• 
  Posterior surface of the forearm. Deep muscles.