Muscle
Extensor carpi radialis brevis
Wrist extensor, tennis elbow
High-yield
Deep branch of radial nerve; its tendinous origin is the site of tennis elbow (lateral epicondylitis).
Overview
A wrist extensor deep to ECRL, commonly implicated in lateral epicondylitis (tennis elbow). Supplied by the deep radial nerve.
Reference facts
- Origin
Lateral epicondyle of the humerus (common extensor origin)
- Insertion
Base of the 3rd metacarpal
- Action
Extends and abducts the wrist
- Innervation
Deep branch of the radial nerve (C7, C8)
- Blood supply
Radial artery