Geniohyoid muscle

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.

Origin: Symphysis menti

Insertion: Hyoid bone

Nerve: Facial nerve

Action: Depresses of the mandible at the temporomandibular joints (TMJs), flexes the neck at the spinal joints, elevates the hyoid bone.