Glossus muscles

The glossus muscles are the muscles of the tongue. There are eight muscles in the tongue, allowing a wide range of motion.

Extrinsic muscles
These muscles originate outside the tongue.
 * Hyoglossus muscle
 * Genioglossus muscle
 * Styloglossus muscle
 * Palatoglossus muscle

Intrinsic muscles
These muscles are contained entirely within the tongue
 * Superior longitudinal muscle
 * Inferior longitudinal muscle
 * Verticalis muscle
 * Transversus muscle

Word origin
Glossus is Greek for tongue.