[1] It is situated on the under surface of the tongue between the genioglossus and hyoglossus.

Posteriorly, some of its fibers attach onto the body of the hyoid bone.

[citation needed] Anteriorly, its fibres blend with those of the styloglossus, hyoglossus, and genioglossus to form the ventral area of the tip of the tongue.

[2] The inferior longitudinal muscle of the tongue is supplied by the hypoglossal nerve (CN XII).

[2] This article incorporates text in the public domain from page 1130 of the 20th edition of Gray's Anatomy (1918) This muscle article is a stub.