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Variation in the branching pattern of posterior cord of brachial plexus

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Author(s): Bhat KMR | Girijavallabhan V

Journal: Neuroanatomy
ISSN 1303-1783

Volume: 7;
Issue: 1;
Start page: 10;
Date: 2008;
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Keywords: neuroanatomy | anatomy | variation | brachial plexus | posterior cord

ABSTRACT
During the routine dissection in the department of Anatomy, KMC, Manipal, we found a rare and unreportedvariation in the branching pattern of the posterior cord of brachial plexus. Normally, a single posterior cord isformed by the union of posterior divisions of the trunks of the brachial plexus. All the branches of the posteriorcord arise from this single cord. Here we report that, after formation of posterior cord, the cord has dividedagain into two roots, and enclosed the subscapular artery. Then, these two roots fused to continue as radialnerve. In this report, we also describe the variations in the branching pattern of the posterior cord and clinicalrelevance of this variation.

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