genioglossus(redirected from Genioglossi)
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one of the paired lingual muscles; origin, mental spine of the mandible; insertion, lingual fascia beneath the mucous membrane and epiglottis; action, depresses and protrudes the tongue; nerve supply, hypoglossal.
n. pl. genioglos·si (-ī′)
Either of a pair of muscles that connect the jaw and tongue and that depress and protrude the tongue.
one of the thick, fan-shaped extrinsic muscles that depress the central part of the tongue and protrude the anterior part of the tongue out of the oral fissure. The genioglossus muscles are innervated by the hypoglossal nerves.