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BioMed Research International
Volume 2017 (2017), Article ID 3092720, 5 pages
Research Article

Botulinum Toxin Injection-Site Selection for a Smooth Shoulder Line: An Anatomical Study

1Anatomy Laboratory, College of Sports Science, Korea National Sport University, Seoul, Republic of Korea
2College of Veterinary Medicine, Chungnam National University, Daejeon, Republic of Korea
3Department of Anatomy, College of Medicine, Konyang University, Daejeon, Republic of Korea
4Department of Neurosurgery, CHA Gumi Medical Center, CHA University, Pocheon, Republic of Korea
5Department of Anatomy, College of Medicine, Chung-Ang University, Seoul, Republic of Korea

Correspondence should be addressed to Seongoh Kwon and Seung Ho Han

Received 7 July 2016; Accepted 3 October 2016; Published 26 January 2017

Academic Editor: Klaus Wimmers

Copyright © 2017 Je Hun Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Introduction. This study aimed to improve the accuracy of manual needle placement into the trapezius (TM) for smooth shoulder line. Methods. For macroscopic study 12 TMs and for microscopic study 4 cadavers were detached and then sampled,  cm at the four points from the origin to insertion site (0% at the most lateral point of external occipital protuberance and 100% at the most lateral point of acromion). Results. Most of the nerve endings observed during macroscopic investigations were concentrated in the 60–80% region, and the second most distributed region was the 40–60% region. The microscopic results revealed that the 60–80% region on the reference line had the most dense neuromuscular junction area, while the 40–60% and 80–100% areas were similar in their neuromuscular junction densities. Discussion. These anatomical results will be useful in clinical settings especially for cosmetic surgeons.