Median Nerve Variation: A Complete Spin before Terminal Branching

Median nerve anatomy is of great interest to clinicians and scientists given the importance of this nerve and its association with diseases. A rare anatomical variant of the median nerve in the distal forearm and wrist was discovered during a cadaveric dissection. The median nerve was deep to the fl...

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Main Authors: Amgad S. Hanna, Zhikui Wei, Barbara A. Hanna
Format: Article
Language:English
Published: Georg Thieme Verlag KG 2020-01-01
Series:Journal of Brachial Plexus and Peripheral Nerve Injury
Subjects:
Online Access:http://www.thieme-connect.de/DOI/DOI?10.1055/s-0039-3402734
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author Amgad S. Hanna
Zhikui Wei
Barbara A. Hanna
author_facet Amgad S. Hanna
Zhikui Wei
Barbara A. Hanna
author_sort Amgad S. Hanna
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description Median nerve anatomy is of great interest to clinicians and scientists given the importance of this nerve and its association with diseases. A rare anatomical variant of the median nerve in the distal forearm and wrist was discovered during a cadaveric dissection. The median nerve was deep to the flexor digitorum superficialis (FDS) in the carpal tunnel. It underwent a 360-degree spin before emerging at the lateral edge of FDS. The recurrent motor branch moved from medial to lateral on the deep surface of the median nerve, as it approached the distal carpal tunnel. This variant doesn't fall into any of Lanz's four groups of median nerve anomalies. We propose a fifth group that involves variations in the course of the median nerve. This report underscores the importance of recognizing variants of the median nerve anatomy in the forearm and wrist during surgical interventions, such as for carpal tunnel syndrome.
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spelling doaj.art-311912e3c9394a57a7410491463702a62022-12-21T17:59:21ZengGeorg Thieme Verlag KGJournal of Brachial Plexus and Peripheral Nerve Injury1749-72212020-01-011501e1e410.1055/s-0039-3402734Median Nerve Variation: A Complete Spin before Terminal BranchingAmgad S. Hanna0Zhikui Wei1Barbara A. Hanna2Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United StatesDepartment of Neurology, Vanderbilt University, Nashville, Tennessee, United StatesCollege of Letter and Science (Premed), Undergraduate Student, University of Wisconsin, Madison, Wisconsin, United StatesMedian nerve anatomy is of great interest to clinicians and scientists given the importance of this nerve and its association with diseases. A rare anatomical variant of the median nerve in the distal forearm and wrist was discovered during a cadaveric dissection. The median nerve was deep to the flexor digitorum superficialis (FDS) in the carpal tunnel. It underwent a 360-degree spin before emerging at the lateral edge of FDS. The recurrent motor branch moved from medial to lateral on the deep surface of the median nerve, as it approached the distal carpal tunnel. This variant doesn't fall into any of Lanz's four groups of median nerve anomalies. We propose a fifth group that involves variations in the course of the median nerve. This report underscores the importance of recognizing variants of the median nerve anatomy in the forearm and wrist during surgical interventions, such as for carpal tunnel syndrome.http://www.thieme-connect.de/DOI/DOI?10.1055/s-0039-3402734anatomycarpal tunnelflexor digitorum superficialismedian nervevariants
spellingShingle Amgad S. Hanna
Zhikui Wei
Barbara A. Hanna
Median Nerve Variation: A Complete Spin before Terminal Branching
Journal of Brachial Plexus and Peripheral Nerve Injury
anatomy
carpal tunnel
flexor digitorum superficialis
median nerve
variants
title Median Nerve Variation: A Complete Spin before Terminal Branching
title_full Median Nerve Variation: A Complete Spin before Terminal Branching
title_fullStr Median Nerve Variation: A Complete Spin before Terminal Branching
title_full_unstemmed Median Nerve Variation: A Complete Spin before Terminal Branching
title_short Median Nerve Variation: A Complete Spin before Terminal Branching
title_sort median nerve variation a complete spin before terminal branching
topic anatomy
carpal tunnel
flexor digitorum superficialis
median nerve
variants
url http://www.thieme-connect.de/DOI/DOI?10.1055/s-0039-3402734
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