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
The elbow is the region between the arm and the forearm that surrounds the elbow joint. The elbow includes prominent landmarks such as the olecranon, the cubital fossa (also called the chelidon, or the elbow pit), and the lateral and the media ...
joint, and to a
tendon
A tendon or sinew is a tough, high-tensile-strength band of dense fibrous connective tissue that connects muscle to bone. It is able to transmit the mechanical forces of muscle contraction to the skeletal system without sacrificing its ability ...
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
In human anatomy, extensor carpi radialis brevis is a muscle in the forearm that acts to extend and abduct the wrist. It is shorter and thicker than its namesake extensor carpi radialis longus which can be found above the proximal end of the exten ...
,
extensor digitorum
The extensor digitorum muscle (also known as extensor digitorum communis) is a muscle of the posterior forearm present in humans and other animals. It extends the medial four digits of the hand. Extensor digitorum is innervated by the posterior int ...
,
extensor digiti minimi
The extensor digiti minimi (extensor digiti quinti proprius) is a slender muscle of the forearm, placed on the ulnar side of the extensor digitorum communis, with which it is generally connected.
It arises from the common extensor tendon by a thi ...
, and
extensor carpi ulnaris
In human anatomy, the extensor carpi ulnaris is a skeletal muscle located on the ulnar side of the forearm. The extensor carpi ulnaris acts to extend and adduct at the carpus/wrist from anatomical position.
Being an extensor muscle, extensor carp ...
. In
birds
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...
, where the arm is somewhat rotated compared to other
tetrapod
Tetrapods (; ) are four-limbed vertebrate animals constituting the superclass Tetrapoda (). It includes extant and extinct amphibians, sauropsids ( reptiles, including dinosaurs and therefore birds) and synapsids (pelycosaurs, extinct theraps ...
s, it is termed dorsal epicondyle of the humerus. In comparative anatomy, the term ''ectepicondyle'' is sometimes used.
A common injury associated with the lateral epicondyle of the
humerus
The humerus (; ) is a long bone in the arm that runs from the shoulder to the elbow. It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. The humeral upper extremity consists of a roun ...
is lateral epicondylitis also known as
tennis elbow
Tennis elbow, also known as lateral epicondylitis or enthesopathy of the extensor carpi radialis origin, is a condition in which the outer part of the elbow becomes painful and tender. The pain may also extend into the back of the forearm. Onse ...
. 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."
See also
*
Medial epicondyle of the humerus
The medial epicondyle of the humerus is an epicondyle of the humerus bone of the upper arm in humans. It is larger and more prominent than the lateral epicondyle and is directed slightly more posteriorly in the anatomical position. In birds, whe ...
*
Common extensor tendon
The common extensor tendon is a tendon that attaches to the lateral epicondyle of the humerus.
Structure
The common extensor tendon serves as the upper attachment (in part) for the superficial muscles that are located on the posterior aspect o ...
*
Tennis elbow (lateral epicondylitis)
Additional images
File:HumerusFront.png, Left humerus. Anterior view.
File:Gray210.png, Plan of ossification of the humerus.
File:Gray418.png, Posterior surface of the forearm. Superficial muscles.
File:Gray419.png, Posterior surface of the forearm. Deep muscles.
References
External links
*
Slim Golf Blog - Treating & Preventing Golfer's Elbow* ()
Upper limb anatomy
Humerus
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