Medial cutaneous nerve of arm

(Redirected from Medial brachial cutaneous nerve) Not to be confused with Medial cutaneous nerve of forearm.

Medial brachial cutaneous nerve
Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Anterior view. "Medial Brachial Cutan. T1-T2" labeled near center, in yellow.
Cutaneous nerves of right upper extremity.
Details
From	T1 (medial cord)
Identifiers
Latin	n. cutaneus brachii medialis
TA98	A14.2.03.027
TA2	6445
FMA	65246
Anatomical terms of neuroanatomy[edit on Wikidata]

The medial brachial cutaneous nerve (lesser internal cutaneous nerve; medial cutaneous nerve of arm) is a sensory branch of the medial cord of the brachial plexus derived from spinal nerves C8-T1. It provides sensory innervation to the medial arm. It descends accompanied by the basilic vein.

Anatomy

Origin

It is the smallest and medial-most branch of the brachial plexus, and arising from the medial cord receives its fibers from the eighth cervical and first thoracic spinal nerves.

Course

It passes through the axilla, at first lying behind, and then medial to the axillary vein, and communicates with the intercostobrachial nerve.

It descends along the medial side of the brachial artery to the middle of the arm, where it pierces the deep fascia, and is distributed to the skin of the back of the lower third of the arm, extending as far as the elbow, where some filaments are lost in the skin in front of the medial epicondyle, and others over the olecranon.

It communicates with the ulnar branch of the medial antebrachial cutaneous nerve.

Eponym

The term nerve of Wrisberg (after Heinrich August Wrisberg) has been used to describe this nerve.

However, the term "nerve of Wrisberg" can also refer to the nervus intermedius branch of the facial nerve.

References

This article incorporates text in the public domain from page 937 of the 20th edition of Gray's Anatomy (1918)

^ Thomas, Kathryn; Sajjad, Hussain; Bordoni, Bruno (2022), "Anatomy, Shoulder and Upper Limb, Medial Brachial Cutaneous Nerve", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 30969651, retrieved 2023-01-13
Birmingham A (October 1895). "Nerve of Wrisberg". J Anat Physiol. 30 (Pt 1): 63–9. PMC 1327743. PMID 17232174.
"The Anterior Divisions - Gray's Anatomy of the Human Body - Yahoo! Education". Archived from the original on 2008-06-23. Retrieved 2008-11-26.
"eMedicine - Facial Nerve Anatomy : Article by Alpen A Patel". 11 June 2020.
Fortuna A, La Torre E, Forni C (1972). "The cisternal segment of the nevus intermedius of Wrisberg: an anatomical study under the operating microscope". Acta Neurochir (Wien). 27 (1): 53–62. doi:10.1007/BF01402173. PMID 4540545. S2CID 7872666.
Masdeu, Joseph C.; Brazis, Paul W. (2007). Localization in clinical neurology. Hagerstwon, MD: Lippincott Williams & Wilkins. p. 288. ISBN 978-0-7817-9952-2.