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From the brachial plexus to the hand, multiple connections between the median and ulnar nerves may serve as bypass routes for nerve fibres

Authors
 H. Yang  ;  Y. Gil  ;  S. Kim  ;  J. Bang  ;  H. Choi  ;  H.Y. Lee 
Citation
 JOURNAL OF HAND SURGERY-EUROPEAN VOLUME, Vol.41(6) : 648-656, 2016 
Journal Title
JOURNAL OF HAND SURGERY-EUROPEAN VOLUME
ISSN
 1753-1934 
Issue Date
2016
MeSH
Aged ; Aged, 80 and over ; Brachial Plexus/pathology* ; Cadaver ; Female ; Hand/innervation* ; Humans ; Male ; Middle Aged ; Nerve Fibers/pathology* ; Neural Conduction*
Keywords
Anatomy ; Berrettini branch ; Marinacci communication ; Martin-Gruber communication ; variation
Abstract
Axons from the median and ulnar nerves can pass to each other through aberrant connections between them. Multiple interconnections between the nerves may provide a detour route for nerve fibres going to the hand. We investigated the incidence of variations and the associations between them in 90 cadaveric upper limbs. In 91% of upper limbs, one to five variations were found, with several statistically significant associations. The contribution of the C8 nerve to the lateral cord was positively associated with an accessory contribution of the lateral cord to the ulnar nerve. The latter variation showed positive association with the occurrence of any of the variations in the hand itself. Ulnar innervation of the superficial head of the flexor pollicis brevis was positively associated with the Riche-Cannieu communication. The co-existence of the variations and their associations may be the explanation for unusual clinical findings related to median and ulnar conduction, which appear contrary to anatomical knowledge.
Full Text
http://journals.sagepub.com/doi/abs/10.1177/1753193415622760
DOI
10.1177/1753193415622760
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Anatomy (해부학교실) > 1. Journal Papers
Yonsei Authors
Lee, Hye Yeon(이혜연) ORCID logo https://orcid.org/0000-0001-6945-1967
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/151647
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