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Bilateral supernumerary clavicular heads of sternocleidomastoid muscle in a Korean female cadaver

  • Ji-Su Oh
  • Chae-Eun Kim
  • Jinu Kim
  • Sang-Pil YoonEmail author
Anatomic Variations
  • 15 Downloads

Abstract

Many anatomical variants on the sternocleidomastoid muscle have been reported. In this study, supernumerary clavicular heads of sternocleidomastoid muscle in a Korean female cadaver were bilaterally displayed. The observed supernumerary heads were classified as follows: one sterno-mastoid, one cleido-occipital and one cleido-mastoid on the right side, and one sterno-mastoid-occipital, four cleido-occipitals, and one cleido-mastoid on the left side. The sterno-mastoid and sterno-mastoid-occipital and the cleido-occipital made the superficial layer of the sternocleidomastoid muscle, while others made deep layer. We discussed clinical relevance and developmental basis of these muscular variations important for clinicians and anatomists.

Keywords

Sternocleidomastoid Superficial layer Development Variation 

Notes

Acknowledgements

This research was supported by the 2019 scientific promotion program funded by Jeju National University.

Author contributions

Oh JS and Kim CE found the case and acquired the primitive data. Kim J and Yoon SP analyzed the data and references. Oh JS and Kim CE wrote the manuscript. Oh JS, Kim J, and Yoon SP revised the manuscript. All authors approved the manuscript.

Compliance with ethical standards

Conflict of interest

None declared.

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Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Medical Course, School of MedicineJeju National UniversityJeju-DoRepublic of Korea
  2. 2.Department of Anatomy, School of MedicineJeju National UniversityJeju-DoRepublic of Korea
  3. 3.Department of Anatomy, School of Medicine, Institute for Medical ScienceJeju National UniversityJeju-DoRepublic of Korea

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