Main Model
7 Extensor carpi radialis brevis muscle
Extensor carpi radialis brevis
Proximal Attachment: Lateral epicondyle of humerus (common extensor origin)
Distal Attachment: Dorsal aspect of base of 3rd metacarpal
Innervation: Deep branch of radial nerve (C7, C8)
Main Action(s): Extends and abducts hand at the wrist joint