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Long head of biceps brachii perforated by a duplicated musculocutaneous nerve
2 Department of Pathology and Laboratory Medicine, Laboratory for Anatomical Informatics, Division of Integrative Anatomy, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA, Email: trelease@ucla.edu
Received: 29-Jun-2013 Accepted Date: Mar 12, 2014; Published: 12-Jun-2014
Citation: Int J Anat Var (IJAV). 2014; 7: 62–64.
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Abstract
The musculocutaneous nerve (MCN) is characterized, in part, by its classic perforation of the coracobrachialis muscle. It has also been reported to occasionally perforate the short head of the biceps brachii and brachialis. However, comprehensive modern summaries of its anatomical variation do not include perforation of the long head of the biceps brachii as an MCN variant. We describe a rare case of a “duplicated” MCN that perforates the long head of the biceps brachii in a 92-year-old, Caucasian female cadaver. We provide the first description and photographic documentation of this variant and discuss its anatomical and clinical significance.
