Name
Pronunciation
(GEE-ne-o-HY-oid)
Origin/Proximal Attachment
Inferior mental spine of mandible
Insertion/Distal Attachment
Body of hyoid bone
Action/Relevance
Pulls hyoid bone forwards & upwards Shortens floor of mouth
Innervation
Cranial nerve 12
Notes
The Geniohyoideus (Geniohyoid muscle) is a narrow muscle, situated above the medial border of the Mylohyoideus. It arises from the inferior mental spine on the back of the symphysis menti, and runs backward and slightly downward, to be inserted into the anterior surface of the body of the hyoid bone; it lies in contact with its fellow of the opposite side.