Suprahyoid Muscles

Question 1

Stylohyoid

Answer 1

Origin: Styloid process

Insertion: Passes around Digastric and inserts on greater horn of hyoid bone

Action: Elevate and retract hyoid

Innervation: Facial N.

Question 2

Mylohyoid

Answer 2

Origin: Mylohyoid line of mandible

Insertion: Body of hyoid bone

Action: Elevate hyoid

Innervation: Inferior alveolar N.

Question 3

Geniohyoid

Answer 3

Origin: Mental spines of mandible below Genioglossus

Insertion: Body of hyoid bone

Action: Protracts hyoid

Innervation: Hypoglossal N.

Question 4

Digastric

Answer 4

Origin: Posterior belly from mastoid notch of temporal bone

Insertion: Passes by intermediate tendon through stylohyoid; anterior belly inserts on inferior surface of mandible near symphysis

Action: Elevates hyoid; depresses and retracts mandible

Innervation: Facial and Inferior alveolar Nn.