Suprahyoid muscles

The suprahyoid muscles are four muscles located above the hyoid bone in the neck.

They are the digastric, stylohyoid, geniohyoid, and mylohyoid muscles.

They are all pharyngeal muscles, with the exception of the geniohyoid muscle.

The digastric is uniquely named for its two bellies.

Its posterior belly rises from the mastoid process of the cranium and slopes downward and forward.

The anterior belly arises from the digastric fossa on the inner surface of the mandibular body, which slopes downward and backward.

The two bellies connect at the intermediate tendon.

The intermediate tendon passes through a connective tissue loop attached to the hyoid bone.

The mylohyoid muscles are thin, flat muscles that form a sling inferior to the tongue supporting the floor of the mouth.

The geniohyoids are short, narrow muscles that contact each other in the midline.

The stylohyoids are long, thin muscles that are nearly parallel with the posterior belly of the digastric muscle.