Anatomy

Origin

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.

Insertion

It extends from the root to the apex of the tongue.

Nerve

Hypoglossal nerve (CN XII).

Actions

Longitudinalis superior and inferior tend to shorten the tongue, but the former, in addition, turn the tip and sides upward so as to render the dorsum concave, while the latter pull the tip downward and render the dorsum convex.