The geniohyoid is a suprahyoid muscle of the neck. It is located either side of the midline of the neck, deep to the mylohyoid muscle.
- Attachments: Arises from the inferior mental spine of the mandible. It then travels inferiorly and posteriorly to attach to the hyoid bone.
- Actions: Depresses the mandible and elevates the hyoid bone.
- Innervation: C1 nerve roots that run within the hypoglossal nerve.
- Blood Supply: Sublingual branch of lingual artery.