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Hyoglossus muscle
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The hyoglossus is one the four extrinsic muscles of the tongue, together with the genioglossus, styloglossus and palatoglossus and is located in the floor of the oral cavity. It is thin and quadrangular in shape, arising from the body and greater horn of the hyoid bone. It courses vertically up to insert into the inferior/ventral parts of lateral tongue.
The function of the hyoglossus is to depress and retract the tongue. It receives innervation from the hypoglossal nerve (CN XII). Blood supply to the hyoglossus is mainly via the lingual artery with additional supply via the facial artery.
| Terminology |
English: Hyoglossus muscle Latin: Musculus hyoglossus |
| Definition | A thin, quadrangular extrinsic muscle of the tongue found in the floor of the oral cavity |
| Attachments | Origin: Body and greater horn of hyoid bone Insertion: Inferior/ventral parts of lateral tongue |
| Supply | Vascular: branches of the lingual and facial arteries Innervation: hypoglossal nerve (CN XII) |
| Function | Depress and retract tongue |
Learn more about the muscles of the tongue with this study unit (and article):
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