Suprahyoids

Question 1

mylohyoid

Answer 1

O: Mylohyoid line on medial surface of mandible

I: Mylohyoid raphe and body of hyoid

N: Nerve to mylohyoid, branch of inferior alveolar nerve (mandibular nerve)

A: Elevates the hyoid bone, floor of mouth, and the tongue during swallowing and speaking
Depression of mandible

Question 2

geniohyoid

Answer 2

O: Inferior mental spine of the mandible

I: Body of hyoid

N: C1 via hypoglossal nerve

A: Pulls hyoid anterosuperiorly, shortens floor of mouth and widens the pharynx
Depression and retraction of mandible

Question 3

stylohyoid

Answer 3

O: Styloid process of temporal bone

I; Body of hyoid

N: Stylohyoid branch of facial nerve

A: Elevates and retracts the hyoid which elongates the floor of the mouth

Question 4

Digastric

Answer 4

O: anterior belly
Digastric fossa of mandible
Posterior belly
Mastoid notch of temporal bone

I: Intermediate tendon to body and greater horn of hyoid

N: anterior belly: Nerve to mylohyoid, branch of inferior alveolar nerve
posterior belly:
Digastric branch of facial nerve

A: Works with infrahyoids to depress the mandible. Elevate and steady hyoid bone during swallowing and speaking