Skip to main content

Unfortunately we don't fully support your browser. If you have the option to, please upgrade to a newer version or use Mozilla Firefox, Microsoft Edge, Google Chrome, or Safari 14 or newer. If you are unable to, and need support, please send us your feedback.

Elsevier
Publish with us
Muscular Branch of Radial Nerve to Extensor Carpi Ulnaris (Right)
Nervous System

Muscular Branch of Radial Nerve to Extensor Carpi Ulnaris (Right)

Ramus musculi extensoris carpi ulnaris nervi radialis

Read more

Origin

A motor nerve branch to extensor carpi ulnaris muscle originates from the posterior antebrachial interosseous nerve (distal continuation of the deep branch of radial nerve). It contains motor nerve fibers from the C7—C8 cervical spinal segments.

Course

The posterior antebrachial interosseous nerve is a continuation of the deep branch of radial nerve as it passes between the two heads of supinator muscle. The nerve changes its name to posterior antebrachial interosseous nerve after it has crossed the supinator muscle. It contains motor fibers which originate from the anterior horns of the C7-C8 cervical segments of the spinal cord. As it descends in the forearm, it gives of muscular branches to the extensor muscles of the forearm including extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, supinator muscle, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, and extensor indicis.

Branches

There are no named branches.

Supplied Structures

The muscle branch of radial nerve to extensor carpi ulnaris provides motor innervation to extensor carpi ulnaris muscle.

Complete Anatomy

The world's most advanced 3D anatomy platform

Complete Anatomy