Index to Chiropractic Literature
Index to Chiropractic Literature
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Thursday, December 26, 2024
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ID 26775
  Title Supernumerary head of the biceps brachii muscle: An anatomic variant with clinical implications [case report]
URL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8134863/?report=classic
Journal J Chiropr Med. 2021 Mar;20(1):37-42
Author(s)
Subject(s)
Peer Review Yes
Publication Type Case Report
Abstract/Notes

Objective: The purpose of this anatomic case report is to describe a variation of the biceps brachii muscle identified in an adult male cadaveric specimen and its potential clinical relevance.

Methods: A cadaveric specimen with a left supernumerary biceps brachii muscle was dissected. Adjacent neurovascular structures were isolated, and their pathways were observed for possible areas of compression.

Results: A tricipital supernumerary head of the biceps brachii muscle was noted on the left upper extremity in an embalmed human cadaveric specimen. The median nerve and brachial artery maintained their common neurovascular path. The musculocutaneous nerve passed deep to the third head of the anatomic variant before distributing its cutaneous branches as the lateral antebrachial cutaneous nerve.

Conclusion: The presence of a supernumerary biceps brachii muscle may cause neurovascular compression of the median nerve, musculocutaneous nerve, or brachial artery, resulting in peripheral nerve deficits. When patient conditions are refractory to care, they may warrant careful evaluation of the anterior compartment of the arm for potential anomalous muscle variations.

Author keywords: Anatomic Variation; Forearm; Musculocutaneous Nerve; Median Nerve

Author affiliations: DE: Independent researcher, Ballwin, Missouri, United States; FS: Department of Medical Education and Anatomy, California University of Science and Medicine, Colton, California, United States; KS: Doctor of Chiropractic Department, Logan University, Chesterfield, Missouri, United States; RK: Private practice, McDonough, Georgia, United States
Corresponding author: DE—dennis.enix1@gmail.com

This abstract is reproduced with the permission of the publisher; click on the above link for free full text. PubMed Record | PDF
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