TITLE

Variations of the Course of the Upper Trunk of the Brachial Plexus and their Clinical Significance for the Thoracic Outlet Syndrome: A Study on 93 Cadavers

AUTHOR(S)
Natsis, Konstantinos; Totlis, Trifon; Tsikaras, Prokopios; Anastasopoulos, Nikolaos; Skandalakis, Panagiotis; Koebke, Juergen
PUB. DATE
February 2006
SOURCE
American Surgeon;Feb2006, Vol. 72 Issue 2, p188
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The aim of this study is the recording of the variations of the course of the upper trunk (UT) of the brachial plexus (BP) and their clinical significance for the thoracic outlet syndrome (TOS) and the anesthetic blockade of the BP. Five different anatomical variations of the course of the UT of the BP, in relation to the anterior scalene muscle (ASM), were observed in 24 out of the 186 sides of the 93 cadavers we studied (12.9%). The C5 root was passing anteriorly to the ASM in six cases. The UT was located anteriorly to the ASM in four cases and was perforating the ASM's belly in 12 cases. In one cadaver, the ASM was double and the UT was passing between the two bellies of the double ASM. Finally, in another cadaver, the C5 root was found to be anterior to the anterior scalene muscle, while the C6 root was perforating the ASM's belly. These variations are predisposing factors for the TOS; they cause specific symptomatology and require a different surgical approach in comparison with other causes of the syndrome. Moreover, knowledge of these is important during the performance of the anesthetic blockade of the BF.
ACCESSION #
19750310

 

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