Yonsei Med J.  2003 Dec;44(6):1098-1100. 10.3349/ymj.2003.44.6.1098.

An Anatomic Variation of the Trapezius Muscle in a Korean: The Cleido-occipitalis Cervicalis

Affiliations
  • 1Division in Anatomy and Histology, Department of Oral Biology, Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Korea. chinhy@yumc.yonsei.ac.kr
  • 2Department of Anatomy, Yonsei University College of Medicine, Brain Korea 21 Project for Medical Science, Seoul, Korea.

Abstract

A variation of the trapezius muscle was observed in a Korean female adult cadaver during routine student dissection. The lateral, upper three-fourths of the descending portion of the trapezius muscle were separated from the remainder of the muscle. This single, isolated bundle fused above the insertion of the midpoint of the clavicle, and attached to the clavicle as a separate tendon. The remaining descending portion inserted into the clavicle and scapula as usual. This abnormal muscle bundle is considered as a variant of the cleido-occipitalis cervicalis, and formation of this variation is discussed based on the embryological development of the relative muscular structures.

Keyword

Cleido-occipitalis cervicalis; trapezius muscle; variation

MeSH Terms

Female
Human
Korea
Middle Aged
Muscle, Skeletal/*abnormalities/pathology
*Shoulder
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