anatomy and physiology: muscles of facial expressions, mastication, moving head & spine, and extrinsic muscles of the eye

1

Frontails

3

Orbicularis oculi

8

Orbicularis oris

20

Risorius

5

Zygomaticus major

4

Zygomaticus minor

7

Buccinator

18

Buccinator

3

Levator palpebrae

1

Frontalis

2

Orbicularis oculi

4

Zygomaticus minor

5

Zygomaticus major

6

Orbicularis oris

7

Buccinator

8

Risorius

9

Sternohyoid

10

Trapezius

11

Sternocleidomastoid

12

Masseter

13

Occipitalis

14

Temporalis

(1)Wrinkle skin of forehead, raise eyebrows

Frontalis

(6)Close eyelids

Orbicularis oculi

(2)Close and purse lips

Orbicularis oris

(8)Pulls corners of lips laterally, grimace

Risorius

(5)Pulls corners of lips up, smile

Zygomatic major

(4)Pulls corner of lips up, smile

Zygomaticus minor

(7)Tone in cheek, sucking, whistling

Buccinator

(3)Opens eye

Levator palpebrae

(12)Strongly elevate mandible, close jaws

Masseter

(14)Strongly elevate mandible

Temporalis

(11)Together, flex forward; singly, tilt and rotate

Sternocleidomastoid

(9)Depresses larynx and hyoid bone

Sternhyoid

(13)Moves the scalp posteriorly

Occipitalis

(1)Turn the head side to side to say “no”

Splenius capitis

(7) Extends the vertebral column

Erector spinae

(2)Eyeball up

Superior rectus

(5)Eyeball medial

Medial rectus

(5)Eyeball down

Inferior rectus

Eyeball lateral

Lateral rectus

Eyeball downward and outward rotation

Superior oblique

Eyeball upward and outward rotation

Inferior oblique