Geniohyoid muscle

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Geniohyoid muscle
Latin musculus geniohyoideus
Gray's subject #112 393
Origin Symphysis menti
Insertion    hyoid bone
Artery:
Nerve: C1 via hypoglossal nerve
Action: carry hyoid bone and the tongue upward during deglutition
Dorlands
/Elsevier
m_22/12549193

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Overview

The Geniohyoid muscle is a narrow muscle situated superior to the medial border of the mylohyoid muscle.

Origin and insertion

It arises from the inferior mental spine, on the back of the symphysis menti, and runs backward and slightly downward, to be inserted into the anterior surface of the body of the hyoid bone; it lies in contact with its fellow of the opposite side. It thus belongs to the suprahyoid muscles. The nerve supply to geniohyoid comes via the hypoglossal nerve via C1.

Action

During the first act of deglutition, when the mass of food is being driven from the mouth into the pharynx, the hyoid bone and with it the tongue, is carried upward and forward by the anterior bellies of the Digastrici, the Mylohyoidei, and Geniohyoidei.

Variations

It may be blended with the one on opposite side or double; slips to greater cornu of hyoid bone and Genioglossus occur.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.


de:Musculus geniohyoideus sr:Гениохиоидни мишић



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