Accessory Muscles of TMJ

Question 1

Digastric Anterior
(Origin)

Answer 1

Origin: Digastric Fossa of Mandible

Question 2

Digastric Anterior
(Insertion)

Answer 2

Insertion: Hyoid

Question 3

Digastric Anterior
(Action)

Answer 3

Action: Steadies Hyoid Bone

Question 4

Digastric Anterior
(Innervation)

Answer 4

Innervation: Mandibular Branch of CN V

Question 5

Digastric Posterior
(Origin)

Answer 5

Origin: Mastoid Notch of Temporal Bone

Question 6

Digastric Posterior
(Insertion)

Answer 6

Insertion: Hyoid

Question 7

Digastric Posterior
(Innervation)

Answer 7

Innervation: Facial Nerve

Question 7

Digastric Posterior
(Action)

Answer 7

Action: Steadies Hyoid Bone

Question 8

Suprahyoid
(Origin)

Answer 8

Origin: Medial Surface of Mandible, Inferior Mental Spines

Question 9

Suprahyoid
(Insertion)

Answer 9

Insertion: Superior Surface of Hyoid

Question 10

Suprahyoid
(Action)

Answer 10

Action: Pulls Mandible Down (Depression)

Question 11

Suprahyoid
(Innervation)

Answer 11

Innervation: Mandibular Branch of CN V, CN 1

Question 12

Infrahyoid
(Origin)

Answer 12

Origin: Sternum, Superior Border of Scapula, Thyroid Cartilage

Question 13

Infrahyoid
(Insertion)

Answer 13

Insertion: Inferior Surface of Hyoid and Thyroid Cartilage

Question 14

Infrahyoid
(Action)

Answer 14

Action: Depression/ Fixation of Hyoid

Question 15

Infrahyoid
(Innervation)

Answer 15

Innervation: CN 1