Extensor radialis longus

Definition

The extensor radialis longus is a muscle in the forearm that helps to extend and abduct the wrist. It runs from the lateral supracondylar ridge of the humerus to the base of the second metacarpal bone.

Related terms

Abduction:

The movement of a limb away from the midline of the body.

Extension:

A movement that increases the angle between two body parts; in this case, straightening out the wrist.

Supracondylar ridge: A bony ridge on the humerus bone from which muscles like the extensor radialis longus originate