Geniohyoid muscle
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| Geniohyoid muscle | |
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| 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.
Additional images
 Hyoid bone. Anterior surface. Enlarged. |
 Sagittal section of nose mouth, pharynx, and larynx. |
External links
- LUC genh
- -221249457 at GPnotebook
- SUNY Figs 34:02-06
- Geniohyoid+muscle at eMedicine Dictionary
- Roche Lexicon - illustrated navigator, at Elsevier 25420.000-1
- Frontal section
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 As such, some of the information contained herein may be outdated.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.
List of muscles of head and neck: the neck | |
|---|---|
| Cervical | CN VII (superficial): platysma CN XI (deep): sternocleidomastoid |
| Suprahyoid | CN V3 (medial): mylohyoid - anterior belly of digastric
CN VII (lateral): stylohyoid - posterior belly of digastric C1 (deep): geniohyoid |
| Infrahyoid/strap | C1: thyrohyoid C1-C3: sternohyoid - sternothyroid - omohyoid |
| Vertebral | C1-C6 (anterior): rectus capitis (anterior, lateralis) - longus (capitis, colli) C3-C8 (lateral): scalene (anterior, medius, posterior) |
de:Musculus geniohyoideussr:Гениохиоидни мишић
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
