The Hyoglossus arises from the greater horn
and body of the hyoid bone, extending upward as a thin, quadrilateral sheet.
It interdigitates with the fibers of the styloglossus muscle to insert into
the lateral aspect of the tongue.
The hyoglossus muscle is a useful landmark. Superficial to the muscle, in descending order, lie the lingual nerve, submandibular duct, and hypoglossal nerve. Deep to its posterior border, in descending order, lie the glossopharyngeal nerve, stylohyoid ligament, and lingual artery.