geniohyoid muscle

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ge·ni·o·hy·oid mus·cle

(jē'nē-ō-hī'oyd mŭs'ĕl)
Origin, mental spine of mandible; insertion, body of hyoid bone; action, draws hyoid forward, or depresses jaw when hyoid is fixed; nerve supply, fibers from ventral primary rami of first and second cervical spinal nerves accompanying hypoglossal.
Synonym(s): musculus geniohyoideus [TA] .