Neck - Suprahyoid Muscles
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Suprahyoid muscles lie above ("supra") the hyoid bone.
- Originates on the mental spine of the mandible
- Inserts on the body of the hyoid
- Geniohyoid elevates the hyoid and the floor of the mouth.
Mylohyoid
- Originates on the mylohyoid line of the mandible
- Inserts on the body of the hyoid bone and at the median raphe
- Mylohyoid elevates the hyoid bone (and floor of the mouth) and depresses the mandible
- Mylohyoid contributes to the floor of the mouth.
Digastric has two bellies: anterior and posterior
- Anterior belly arises from the digastric fossa on the mandible
- Posterior belly arises from the mastoid process of the temporal bone
- Both bellies insert at the intermediate tendon, which passes through a sling attached to the body of the hyoid bone.
- Digastric elevates the hyoid bone (and floor of the mouth) and it depresses the mandible.
Stylohyoid
- Originates on the styloid process of the temporal bone
- Inserts on the body of the hyoid; splits over digastric
- Stylohyoid elevates the hyoid.
Related Anatomy
Muscles
Geniohyoid
Stylohyoid
Mylohyoid
Digastric