Suprahyoid Muscles

Question 0

Insertion of the mylohyoid

Answer 0

Mylohyoid raphe and body of hyoid

Question 1

Origin of the mylohyoid

Answer 1

Mylohyoid line of mandible

Question 2

Innervation of mylohyoid

Answer 2

Nerve to mylohyoid, a branch of inferior alveolar nerve (from Mandibular nerve, CN V3)

Question 3

Action of the mylohyoid

Answer 3

Elevates hyoid, floor of mouth, and tongue during swallowing and speaking

Question 4

Origin of the geniohyoid

Answer 4

Inferior mental spine of mandible

Question 5

Insertion of geniohyoid

Answer 5

Body of hyoid

Question 6

Innervation of the geniohyoid

Answer 6

C1 via hypoglossal nerve (CN XII)

Question 7

Action of the geniohyoid

Answer 7

Pulls hyoid anterosuperiorly
Shortens floor of mouth
Widens pharynx

Question 8

Origin of the stylohyoid

Answer 8

Styloid process of temporal bone

Question 9

Insertion of stylohyoid

Answer 9

Body of hyoid

Question 10

Innervation of the stylohyoid

Answer 10

Stylohyoid branch of facial nerve (CN VII)

Question 11

Actions of stylohyoid

Answer 11

Elevates and retracts hyoid, thus elongating floor of mouth

Question 12

Origin of the digastric

Answer 12

Anterior belly: digastric fossa of mandible

Posterior belly: mastoid notch of temporal bone

Question 13

Insertion of digastric

Answer 13

Intermediate tendon to body and greater horn of hyoid

Question 14

Innervation of digastric

Answer 14

Anterior belly: nerve to mylohyoid, a branch of inferior alveolar nerve
Posterior belly: digastric branch of facial nerve (CN VII)

Question 15

Action of digastric

Answer 15

Working with infrahyoid muscles, depresses mandible against resistance
Elevates and steadies hyoid during swallowing and speaking