Capital Flexors

Question 0

Innervation of rectus capitis anterior

Answer 0

C1,C2 spinal nerves (ventral rami)

Question 1

Action of rectus capitis anterior

Answer 1

Capital flexion

Stabilization of AO joint

Question 2

Action of rectus capitis lateralis

Answer 2

Lateral bending of head to same side
Capital flexion
Stabilization of AO joint
Assist head rotation

Question 3

Innervation of rectus capitis lateralis

Answer 3

C1,C2 spinal nerves (ventral rami)

Question 4

Action of longus capitis

Answer 4

Capital flexion

Rotation of head to same side

Question 5

Innervation of longus capitis

Answer 5

C1-C3 spinal nerves (ventral rami)

Question 6

Action of mylohyoid

Answer 6

Raises hyoid and tongue for swallowing
Depresses mandible (with hyoid fixed)
Assist capital flexion (weak)

Question 7

Innervation of mylohyoid

Answer 7

Trigeminal nerve (V)

Question 8

Action of stylohyoid

Answer 8

Pulls hyoid up and back (in swallowing)
Capital flexion
Assists depression of mandible
Participates in mastication and speech

Question 9

Innervation of stylohyoid

Answer 9

Facial nerve (VII)

Question 10

Action of geniohyoid

Answer 10

Elevation and protraction of hyoid
Assist capital flexion
Assist mandible depression

Question 11

Innervation of geniohyoid

Answer 11

C1 spinal nerve (via hypoglossal nerve)

Question 12

Action of digastric

Answer 12

Mandible depression
Hyoid elevation
Anterior belly draws hyoid forward
Posterior belly draws hyoid backward
Assist capital flexion

Question 13

Innervation of digastric

Answer 13

Anterior belly = Trigeminal (V)

Posterior belly = Facial (VII)