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Date Published: 21/04/2025
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DOI: https://doi.org/10.51298/vmj.v549i1.13561
Issue
Vol. 549 No. 1 (2025)
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Lê Quang, T., Hồ Nguyễn Anh, T., & Nguyễn Thanh, T. . (2025). PROPOSED CLASSIFICATION METHOD OF THE BRANCHES OF THE ACCESSORY NERVE INNERVATING THE TRAPEZIUS MUSCLE. Vietnam Medical Journal, 549(1). https://doi.org/10.51298/vmj.v549i1.13561

PROPOSED CLASSIFICATION METHOD OF THE BRANCHES OF THE ACCESSORY NERVE INNERVATING THE TRAPEZIUS MUSCLE

Tuyền Lê Quang, Tuấn Hồ Nguyễn Anh, Tú Nguyễn Thanh

Main Article Content

Abstract

Objectives: Classify the branches of the accessory nerve innervating the trapezius muscle in adult Vietnamese cadavers. Methods: Case series report was conducted on 18 trapezius muscle specimens obtained from 9 adult Vietnamese cadavers preserved by freezing at the Department of Anatomy, Pham Ngoc Thach University of Medicine, from September 2024 to Juanuary 2025. Dissection was performed to examine the course of the accessory nerve from the posterior cervical triangle to the ventral surface of the trapezius muscle, and the morphological characteristics of the primary branches arising from the main trunk of the accessory nerve were recorded. Results: The study observed in 100% of cases that the primary branches of the accessory nerve entered the trapezius muscle. The average number of primary branches of the accessory nerve entering the trapezius muscle is 7.9 ± 2.5. The primary branches that they pierced bell muscle has the highest proportion (90,1%). Two morphological patterns of the primary branches are observed, with type 1 being the most prevalent, accounting for 81.7%. In addition, the study found that in the main trunk gives off a branch to the anterior border of the trapezius in 11.2% of cases. Conclusion: The distribution of the accessory nerve branches on the trapezius muscle exhibits considerable variability and complexity. For easy clinical application, it is recommended to conduct research on locating nerve points into muscles using a coordinate system on the skin surface.

Article Details

Keywords

the primary branches of the accessory nerve, trapezius muscle, myofascial pain syndrome

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