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The posterior interosseous nerve (or dorsal interosseous nerve/deep radial nerve) is a nerve in the forearm. It is the continuation of the deep branch of the radial nerve, after this has crossed the supinator muscle. It is considerably diminished in size compared to the deep branch of the radial nerve.
The posterior compartment of the forearm (or extensor compartment) contains twelve muscles which primarily extend the wrist and digits. [2] It is separated from the anterior compartment by the interosseous membrane between the radius and ulna .
The deep branch of the radial nerve (also known as posterior interosseous nerve by some authors) [5] [6]) pierces the supinator muscle, winds around the radius under the cover of supinator to reach posterior of forearm where it again pierces supinator and after which it is known as the posterior interosseous nerve. It pierces the posterior ...
Arcade of Frohse, sometimes called the supinator arch, [1] is the most superior part of the superficial layer of the supinator muscle, and is a fibrous arch over the posterior interosseous nerve. The arcade of Frohse is a site of interosseous posterior nerve entrapment, [ 2 ] and is believed to play a role in causing progressive paralysis of ...
The abductor pollicis longus muscle is innervated by the posterior interosseous nerve, which is a continuation of the deep branch of the radial nerve after it passes through the supinator muscle. Abductor pollicis longus lies close to the radial nerve. [4] The posterior interosseous nerve is derived from spinal segments C7 & C8. [5]
The extensor digitorum muscle (also known as extensor digitorum communis) [2] is a muscle of the posterior forearm present in humans and other animals. It extends the medial four digits of the hand. Extensor digitorum is innervated by the posterior interosseous nerve, which is a branch of the radial nerve. [3]
Posterior interosseous artery: Nerve: Posterior interosseous nerve (branching from the radial nerve) Actions: Extension of the thumb (metacarpophalangeal and interphalangeal) Antagonist: Flexor pollicis longus muscle, flexor pollicis brevis muscle: Identifiers; Latin: musculus extensor pollicis longus: TA98: A04.6.02.051: TA2: 2516: FMA: 38521 ...
The muscle is supplied the posterior interosseous nerve and posterior branch of the anterior interosseous artery. Variation The extensor digitorum brevis manus was ...