International Journal of Anatomy and Research

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Type of Article: Case Report

Year: 2015 | Volume 3 | Issue 4 | Page No. 1697-1699

Date of Publication: 31-12-2015



Sriambika K * 1, Nutan Nalini Bage 2, V.K. Nim 3.

*1 Associate Professor, Department of Anatomy, Pondicherry Institute of Medical Sciences, Pondicherry, India.
2 Associate Professor, Department of Anatomy, Pondicherry Institute of Medical Sciences, Pondicherry, India.
3 Professor, Department of Anatomy, Pondicherry Institute of Medical Sciences, Pondicherry, India.

Address: Dr. Sriambika, Department of Anatomy, Pondicherry Institute of Medical Sciences, Ganapathychettikulam, Kalapet, Pondicherry-605014, India. Mobile no.: +918220008072


During the routine cadaveric dissection, the presence of accessory heads of Sternocleidomastoid was observed on right side. i.e., additional bellies from sternal and clavicle were observed on the right side. These additional slips were innervated by the spinal accessory nerve. These additional slips could have been formed due to unusual splitting in the mesoderm of post-sixth branchial arch during organogenesis.
The awareness of variations of sternocleidomastoid muscle is important for Anaesthetists, Plastic surgeons, Orthopaedicians and Dental surgeons while taking muscle flap in reconstructive surgeries and is also important for radiologists while interpreting MR images of this region.
KEY WORDS: Sternocleidomastoid, Clavicular head, Sternal head.


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Sriambika K, Nutan Nalini Bage, V.K. Nim. FOUR HEADS OF STERNOCLEIDOMASTOID: A CASE REPORT. Int J Anat Res 2015;3(4):1697-1699. DOI: 10.16965/ijar.2015.319




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