Muscle
Extensor carpi radialis longus
Extends and abducts the wrist
High-yield
Radial nerve (not the deep branch); extends and abducts the wrist.
Overview
A superficial extensor that extends and radially deviates the wrist, supplied by the radial nerve proper before it divides.
Reference facts
- Origin
- Lateral supracondylar ridge of the humerus
- Insertion
- Base of the 2nd metacarpal
- Action
- Extends and abducts (radially deviates) the wrist
- Innervation
- Radial nerve (C6, C7)
- Blood supply
- Radial artery
Frequently asked questions
What does the extensor carpi radialis longus do?
The extensor carpi radialis longus extends and abducts (radially deviates) the wrist.
What nerve innervates the extensor carpi radialis longus?
The extensor carpi radialis longus is innervated by the radial nerve (C6, C7).
Where does the extensor carpi radialis longus attach?
The extensor carpi radialis longus originates from the lateral supracondylar ridge of the humerus and inserts on the base of the 2nd metacarpal.
What is the blood supply of the extensor carpi radialis longus?
The extensor carpi radialis longus is supplied by the radial artery.