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  1. Genioglossus - Wikipedia

    • The genioglossus is one of the paired extrinsic muscles of the tongue. It is a fan-shaped muscle that comprises the bulk of the body of the tongue. It arises from the mental spine of the mandible; it inserts onto the hyoid bone, and the bottom of the tongue. It is innervated by the hypoglossal nerve (cranial nerve XII). The genioglossus is the major muscle respo… See more

    Structure

    Genioglossus is the fan-shaped extrinsic tongue muscle that forms the majority of the body of the tongue. The muscle is … See more

    Function

    The left and right genioglossus muscles protrude the tongue (anteriorly, out of the mouth) and deviate it towards the opposite side. When acting together, the muscles protrude the tongue directly forward and depress th… See more

    Image result for Genioglossus. Size: 156 x 130. Source: www.earthslab.com
    Image result for Genioglossus. Size: 156 x 145. Source: jamanetwork.com
    OriginSuperior part of mental spine of mandible (symphysis menti)
    InsertionUnderside of tongue and body of hyoid
    Clinical significance

    Contraction of the genioglossus stabilizes and enlarges the portion of the upper airway that is most vulnerable to collapse. Relaxation of the genioglossus and geniohyoideus muscles, especially during REM sleep, … See more

    History

    The name derives from the Greek words γένειον (geneion) meaning "chin", and γλῶσσα (glōssa) meaning "tongue." The earliest recorded mention is by Helkiah Crooke in the early seventeenth century. See more

    Other animals

    The canine genioglossus muscle has been divided into horizontal and oblique compartments. See more

    External links

    Anatomy figure: 34:02-01 at Human Anatomy Online, SUNY Downstate Medical Center
    "Anatomy diagram: 25420.000-1". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2015-02-26.… See more

     
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