The genioglossus muscle is a muscle of the tongue that connects the chin to the tongue and hyoid bone. When contracted, it draws the tongue forward.
The genioglossus originates at the symphysis menti - the front center of the mandible (jaw bone) that forms the chin.
The genioglossus inserts at the dorsum (upper surface) of the tongue and the hyoid bone.
The genioglossus is innervated by the hypoglossal nerve (XII).
The genioglossus gets its name from geneion, Greek for chin, and glossus, meaning tongue.