Medial cutaneous nerve of forearm
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| Nerve: Medial cutaneous nerve of forearm | |
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| Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Posterior view. ("Medial antibrach. cutan." visible in green at center.) | |
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| Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Anterior view. ("Medial antibrach. cutan." visible in green at center.) | |
| Latin | n. cutaneus antibrachii medialis |
| Gray's | subject #210 937 |
| From | medial cord |
| Dorlands / Elsevier | n_05/12565463 |
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The Medial Antebrachial Cutaneous Nerve (internal cutaneous nerve, medial cutaneous nerve of forearm, also sometimes misspelled "antibrachial") arises from the medial cord of the brachial plexus.
It derives its fibers from the eighth cervical and first thoracic nerves, and at its commencement is placed medial to the axillary artery.
It gives off, near the axilla, a filament, which pierces the fascia and supplies the integument covering the Biceps brachii, nearly as far as the elbow.
The nerve then runs down the ulnar side of the arm medial to the brachial artery, pierces the deep fascia with the basilic vein, about the middle of the arm, and divides into a volar and an ulnar branch.
Volar branch
The volar branch (ramus volaris; anterior branch), the larger, passes usually in front of, but occasionally behind, the vena mediana cubiti (median basilic vein).
It then descends on the front of the ulnar side of the forearm, distributing filaments to the skin as far as the wrist, and communicating with the palmar cutaneous branch of the ulnar nerve.
Ulnar branch
The ulnar branch (ramus ulnaris; posterior branch) passes obliquely downward on the medial side of the basilic vein, in front of the medial epicondyle of the humerus, to the back of the forearm, and descends on its ulnar side as far as the wrist, distributing filaments to the skin.
It communicates with the medial brachial cutaneous, the dorsal antibrachial cutaneous branch of the radial, and the dorsal branch of the ulnar.
See also
- Dorsal antibrachial cutaneous nerve
- Lateral antibrachial cutaneous nerve
- Medial brachial cutaneous nerve
Additional images
 Brachial plexus |
 Cross-section through the middle of upper arm. |
 Cross-section through the middle of the forearm. |
 The brachial artery. |
 Cutaneous nerves of right upper extremity. Anterior view. |
 Cutaneous nerves of right upper extremity. Posterior view. |
External links
- Norman/Georgetown lesson2superficveinsupperlimb, Norman/Georgetown lesson5nervesofpostforearm
- Duke Orthopedics medial_antebrachial_cutaneous_nerve
- EatonHand ner-067
- SUNY Figs 06:03-06 - "Cutaneous nerves of the upper extremity."
- medial+cutaneous+nerve+of+forearm at eMedicine Dictionary
- Hand kinesiology at UK nerves/medialcutan.htm
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.
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 |
Acknowledgement and Attribution Regarding Sources of Content
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 .
