Anterior interosseous nerve

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Nerve: Anterior interosseous nerve
Deep palmar nerves. (Volar interosseous labeled at center top.)
Nerves of the left upper extremity. (Volar interosseus labeled at center right.)
Latin	nervus interosseus antebrachii anterior
Gray's	subject #210 938
From	Median nerve
Dorlands / Elsevier	n_05/12565977

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The anterior interosseous nerve (volar interosseous nerve) is a branch of the median nerve that supplies the deep muscles on the front of the forearm, except the ulnar half of the flexor digitorum profundus.

It accompanies the anterior interosseous artery along the front of the interosseous membrane of the forearm, in the interval between the flexor pollicis longus and flexor digitorum profundus, supplying the whole of the former and the radial half of the latter, and ending below in the pronator quadratus and wrist joint.

Many texts, for simplicity's sake, consider this nerve part of the median nerve.

Innervation

The anterior interosseous nerve innervates 2.5 muscles:

• flexor pollicis longus
• pronator quadratus
• the radial (lateral) half of flexor digitorum profundus

These muscles are in the deep level of the anterior compartment of the forearm.

See also

• Posterior interosseous nerve

External links

• Duke Orthopedics anterior_interosseous_branch_of_median_nerve
• anterior+interosseous+nerve at eMedicine Dictionary
• EatonHand ner-071
• -2006253539 at GPnotebook - "anterior interosseous nerve palsy"
• Image (see yellow arrow under "Findings")

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e Nerves of upper limbs (primarily): the brachial plexus (C5-T1)
Supraclavicular	root (dorsal scapular, long thoracic) - upper trunk (suprascapular, to the subclavius)
Infraclavicular: lateral cord	lateral pectoral musculocutaneous (lateral cutaneous of forearm) median/lateral root: anterior interosseous - palmar - recurrent - common palmar digital (proper palmar digital)
Infraclavicular: medial cord	medial pectoral cutaneous: medial cutaneous of forearm • medial cutaneous of arm ulnar: muscular - palmar - dorsal (dorsal digital nerves) - superficial (common palmar digital, proper palmar digital) - deep median/medial root: see above
Infraclavicular: posterior cord	subscapular (upper, lower) • thoracodorsal axillary (superior lateral cutaneous of arm) radial: muscular - cutaneous (posterior of arm, inferior lateral of arm, posterior of forearm) - superficial (dorsal digital nerves) - deep (posterior interosseous)
Other	cutaneous innervation of the upper limbs

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Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .