Origin: Root of the tongue
Insertion: Apex of the tongue
Nerve: Hypoglossal nerve
Action: Changes shape of tongue in mastication and deglutition.
The Inferior longitudinal muscle (Longitudinalis linguae inferior) (Inferior lingualis) is a narrow band situated on the under surface of the tongue between the Genioglossus and Hyoglossus. It extends from the root to the apex of the tongue: behind, some of its fibers are connected with the body of the hyoid bone; in front it blends with the fibers of the Styloglossus.