MuscleForearm — posterior (lateral)
Extensor carpi radialis brevis
Latin: M. extensor carpi radialis brevis
Location: Forearm
View the extensor carpi radialis brevis in 3DOrigin
Lateral epicondyle of the humerus (common extensor origin).
Insertion
Base of the third metacarpal.
Action
Extends and abducts the wrist with ECRL; fires hardest in a power grip.
Nerve supply
Radial nerve — posterior interosseous branch (C7–C8).
Blood supply
Radial artery.
Clinical relevance
Its degenerate origin at the lateral epicondyle is tennis elbow — lateral elbow pain worsened by resisted wrist extension.
Educational anatomy reference, not medical advice. About this content.