ANATOMICALVARIABILITY OF THE SUPERIOR BELLY OF OMOHYOID MUSCLE AND ITS CLINICAL RELEVANCE
Abstract
The omohyoid muscle is a long, thin muscle consisting of superior and inferior bellies and an intermediate tendon, which runs obliquely in the lateral cervical region. The omohyoid is important in neck dissections because it is the surgical landmark for level III and IV lymph node metastases. In the present study, the anterior and posterior triangle of the neck was dissected in and observed for variations in the omohyoid unilaterally. Here an unusual attachment of the right omohyoid muscle was found during cadaveric dissection. No other muscular anomalies of the neck were found. Prevalence occurs in an approximately of the population. Variations of this muscle is important because of its close relation to the large vessels and brachial plexus. Keywords: Infrahyoid muscles, Sternocleidohyoideus, Neck dissection, Variations, Anomalies
Key words: Omohyoid muscle, Anatomy, Clinical significance.
References
Standring, S. (2016). Gray's Anatomy (41tst ed.). Edinburgh: Elsevier Churchill Livingstone.
Moore KL. Clinically Oriented Anatomy. 3rd ed. Williams & Wilkins. A Waverly Company; Baltimore: 1992. p. 797. [Google Scholar] .
Lang J. Clinical anatomy of the cervical spine. New York: Thieme; 1993. p. 29. [Google Scholar]
Shih TY, Chuang JH. Fibrosis of the omohyoid muscle—an unusual cause of torticollis. J Pediatr Surg. 1998;33:741–2. [PubMed] [Google Scholar]
References;Standring, S. (2016). Gray's Anatomy (41tst ed.). Edinburgh: Elsevier Churchill Livingstone.
Tubbs RS, Salter EG, Oakes WJ. Unusual origin of the omohyoid muscle. Clin Anat 2004;17:578-82.
Anderson RJ. The morphology of the omohyoid muscle. J Med Sci 1881;10:1-17.
Sukekawa R, Itoh I. Anatomical study of the human omohyoid muscle: regarding intermediate morphologies between normal and anomalous morphologies of the superior belly. Anat Sci Int 2006;81:107-14.
Song J, Wang Q, Wang X, Qu Y, Qin Z, Li J, Wang P, Zhang J. Study on post-laryngectomy partial laryngeal defect repaired with omohyoid myofascial flap. Lin Chuang Er Bi Yan Hou Ke Za Zhi 2003;17:519-21.
Kojima H, Hirano S, Shoji K, Omori K, Honjo I. Omohyoid muscle transposition for the treatment of bowed vocal fold. Ann OtolRhinolLaryngol 1996;105:536-40.
Crumley RL. Muscle transfer for laryngeal paralysis: restoration of inspiratory vocal cord abduction by phrenic-omohyoid transfer. Arch Otolaryngol Head Neck Surg 1991;117:1113-7.
Krishnan KG, Pinzer T, Reber F, Schackert G. Endoscopic exploration of the brachial plexus: technique and topographic anatomy: a study in fresh human cadavers. Neurosurgery 2004;54:401-
Bergman RA, Afifi AK and Miyaunchi R. illustrated encyclopedia of Human anatomic variation. Muscular system omohyoideus, sternohyoideus, thyrohyoideus, and sternothyroideus.1996. http:// www.anatomy atlases.org /Anatomic variants/ Muscular system/muscle groupings/21 infrahyoid.shtml. Accessed 28.02.2015.
