Case Report: Sternocleiodomastoid Muscle with Five Fleshy Bellies and Thirteen Heads of Origin

Sudarshan, Surendran and Nayak, Satheesha B and Reghunathan, Deepthinath and Nelluri, Venumadhav (2016) Case Report: Sternocleiodomastoid Muscle with Five Fleshy Bellies and Thirteen Heads of Origin. Online Journal of Health and Allied Sciences, 15 (3). pp. 1-3. ISSN 0972-5997

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Abstract

Sternocleidomastoid (SCM) is the main landmark muscle of the neck. Knowledge of variations of this muscle is very important for radiologist, surgeons, chiropractitioners, plastic surgeons and clinicians in general. We report a unique unilateral variation of SCM observed in an adult male cadaver. The clavicular head of right SCM had four fleshy bellies (B1, B2, B3 and B4). The most medial belly (B1) had three tendons of origin; the next belly just lateral to it (B2) had three tendons of origin; third belly (B4) had four tendons of origin and the lateral most belly (B4) had two tendons of origin. Thus, including the tendon of sternal head, in total, the right SCM had thirteen heads of origin. To the best of our knowledge, this is the first report on a thirteen headed sternocleidomastoid muscle. We review the literature and discuss the clinical importance of the variation in this report.

Item Type: Article
Uncontrolled Keywords: Sternocleidomastoid; Variation; Radiology; Neck surgery; Central venous catheterization
Subjects: Medicine > MMMC Manipal > Anatomy
Depositing User: KMC Library
Date Deposited: 31 Mar 2017 04:13
Last Modified: 31 Mar 2017 04:13
URI: http://eprints.manipal.edu/id/eprint/148630

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