Anat Biol Anthropol.
2024 Mar;37(1):45-48. 10.11637/aba.2024.37.1.45.
Unilateral Variation of the Median Nerve in a Human Cadaver’s Arm
- Affiliations
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- 1Medical Course, Jeju National University College of Medicine
- 2Department of Anatomy, Jeju National University College of Medicine
- 3Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University
- KMID: 2562476
- DOI: http://doi.org/10.11637/aba.2024.37.1.45
Abstract
- Despite numerous reports highlighting variations in the formation and branching of the brachial plexus, limited familiarity persists among physicians, residents, and medical students. This case presents a unilateral anatomical variation discovered during routine educational dissection. In the right arm, the median nerve, instead of the musculocutaneous nerve, exclusively innervated the biceps brachii and brachialis muscles. The absence of the musculocutaneous nerve in this scenario represents a noteworthy anatomical aberration. These variations in the formation, location, and course of the brachial plexus may be attributed to an abnormal embryological relation. This case contributes to the growing understanding of brachial plexus variations, emphasizing their clinical relevance in accurate diagnosis and treatment planning.
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