The hyoglossus is an extrinsic muscle of the tongue. It is located in the floor of the oral cavity, immediately lateral to the geniohyoid muscle.
- Attachments: Arises from the hyoid bone and inserts onto the lateral aspect of the tongue.
- Function: Depression and retraction of the tongue.
- Innervation: Hypoglossal nerve.
- Blood supply: Lingual artery with contributions from the tonsillar artery.