Accessory Muscles Of The TMJ

Question 1

Digastric anterior (origin)

Answer 1

Digastric fossa of mandible

Question 2

Digastric anterior (insertion)

Answer 2

Hyoid bone

Question 3

Digastric anterior (action)

Answer 3

Steadies hyoid bone

Question 4

Digastric anterior (nerve)

Answer 4

Mandibular branch of CN V (trigeminal nerve)

Question 5

Digastric posterior (origin)

Answer 5

Mastoid notch of temporal bone

Question 6

Digastric posterior (insertion)

Answer 6

Hyoid bone

Question 7

Digastric posterior (action)

Answer 7

Steadies hyoid bone

Question 8

Digastric posterior (nerve)

Answer 8

Facial nerve (through mastoid foramen)

Question 9

Suprahyoid (origin)

Answer 9

Medial surface of mandible
Inferior mental spines

Question 10

Suprahyoid (insertion)

Answer 10

Superior surface of hyoid bone

Question 11

Suprahyoid (action)

Answer 11

Hyoid is fixed, helps pull mandible down

Question 12

Suprahyoid (nerve)

Answer 12

Mandibular branch of CN V, CN I

Question 13

Infrahyoid (origin)

Answer 13

Sternum
Superior border scapula
Thyroid cartilage

Question 14

Infrahyoid (insertion)

Answer 14

Inferior surface of hyoid and thyroid cartilage

Question 15

Infrahyoid (action)

Answer 15

Depression/fixation of hyoid

Question 16

Infrahyoid (nerve)

Answer 16

C1-3, CN I