Posterior compartment of the forearm
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At the time the article was created Henry Knipe had no recorded disclosures.
View Henry Knipe's current disclosuresAt the time the article was last revised Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosures- Posterior compartments of the forearm
- Posterior compartment (forearm)
The forearm is divided into the posterior compartment and the anterior compartment by the deep fascia, lateral intermuscular septum and the interosseous membrane between the ulna and radius.
On this page:
Muscles
The posterior compartment of the forearm contains 11 muscles, divided into deep and superficial layers.
Superficial
- mobile wad of Henry
- extensor digitorum (ED) muscle
- extensor digiti minimi (EDM) muscle
- extensor carpi ulnaris (ECU) muscle
Deep
- supinator muscle
- extensor pollicis longus (EPL) muscle
- extensor pollicis brevis (EPB) muscle
- abductor pollicis longus (APL) muscle
- extensor indicis (EI) muscle
The anconeus muscle is sometimes considered part of the posterior compartment of the forearm rather than part of the posterior compartment of the arm.
Arterial supply
Anterior and posterior interosseous arteries, which are branches of the short common interosseous artery, arise from the proximal ulnar artery.
Innervation
All muscles in the extensor compartment are supplied by the radial nerve.
References
- 1. Butler P, Mitchell A, Healy JC. Applied Radiological Anatomy. Cambridge University Press. (2012) ISBN:0521766664. Read it at Google Books - Find it at Amazon
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- Extensor digiti minimi muscle
- Posterior interosseous nerve
- Extensor pollicis brevis muscle
- Anterior compartment of the forearm
- Brachioradialis muscle
- Extensor pollicis longus muscle
- Radial collateral artery
- Extensor medii proprius muscle
- Antebrachial fascia
- Extensor carpi radialis longus muscle
- Extensor carpi radialis brevis muscle
- Posterior interosseous artery
- Extensor indicis muscle
- Mobile wad of Henry
- Extensor carpi ulnaris muscle
- Abductor pollicis longus muscle
- Interosseous recurrent artery
- Ulna
- Interosseous membrane
- Anterior interosseous artery
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