A Rare Anatomical Variation of the Brachial Plexus Characterized by the Absence of the Musculocutaneous Nerve

authors:

avatar Alireza Ebrahimzadeh-Bideskan 1 , * , avatar Mohammad Hossein Ebrahimzadeh 2 , avatar Abbas Mohammadipour 1 , avatar Elnaz Khordad 1

Department of Anatomy and Cell Biology, Mashhad University of Medical Sciences, Mashhad, Iran
Orthopedic and Trauma Research Center, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
Zahedan Journal of Research in Medical Sciences: Vol.15, issue 10; e92820
published online: May 26, 2013
article type: Case Report
received: November 10, 2012
revised: December 21, 2012
accepted: January 05, 2013

how to cite: Ebrahimzadeh-Bideskan A , Ebrahimzadeh M H, Mohammadipour A , Khordad E . A Rare Anatomical Variation of the Brachial Plexus Characterized by the Absence of the Musculocutaneous Nerve. Zahedan J Res Med Sci. 2013;15(10):e92820. 

Abstract

Knowing of anatomical variations is very important during surgery, autopsy and cadaver dissection in the axillary region. In this study, a unilateral variation of the brachial nerve plexus, which is characterized by the absent of the musculocutaneous nerve (MCN), was found in the right arm of a male cadaver. The MCN normally originates from the lateral cord of the brachial nerve plexus and innervates the anterior brachial compartment muscles and lateral coetaneous of the forearm. In this case, the lateral cord of the brachial plexus was joined to the median nerve at the level of coracoid process with no evidence of any nerve braches from lateral cord to the anterior brachial compartment muscles. These muscles were innervated from some branches of median nerve directly.

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References

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