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
Frequently asked questions
What does the extensor carpi radialis brevis do?
The extensor carpi radialis brevis extends and abducts the wrist.
What nerve innervates the extensor carpi radialis brevis?
The extensor carpi radialis brevis is innervated by the deep branch of the radial nerve (C7, C8).
Where does the extensor carpi radialis brevis attach?
The extensor carpi radialis brevis originates from the lateral epicondyle of the humerus (common extensor origin) and inserts on the base of the 3rd metacarpal.
What is the blood supply of the extensor carpi radialis brevis?
The extensor carpi radialis brevis is supplied by the radial artery.