Head & Neck Anatomy: Muscles Of Facial Expression

Question 1

End of the muscle attached to the less moveable structure; in facial expressions they are usually away from the lips

Answer 1

Origin

Question 2

End of muscles attached to the more moveable structure

Answer 2

Insertion

Question 3

All muscles of facial expressions are innervated by which cranial nerve

Answer 3

Seventh (VII)

Question 4

Covers the forehead, top and back of the skull

Answer 4

Epicranial

Question 5

The frontal and occipital (posterior) bellies are separated by the

Answer 5

Epicranial aponeurosis

Question 6

Epicranial action

Answer 6

Raises the eyebrows

Question 7

Wide muscle that overlies the superior surface of the scalp; consists of an occipital and a frontal part which are connected by a fibrous sheath called the Epicranial aponeurosis

Answer 7

Frontalis

Question 8

The frontal part of the frontalis origin is the skin of the eyebrows. The action?

Answer 8

Contraction of the frontal part pulls the slap fore wards and wrinkles the forehead; producing a frown

Question 9

Occipital part of the frontalis origin is the lateral two-thirds of the superior nuchal line of occipital bone. Action?

Answer 9

Retracts the scalp

Question 10

Ring-like band of muscle that surrounds the eye

Answer 10

Orbicularis occuli

Question 11

Origin of orbicularis oculi is orbital rim and insertion is fibers completely encircling the eye. Action?

Answer 11

Closes the eyelids , squints eyes and forms wrinkles

Question 12

Small, narrow, triangular muscle around the medial end of the eyebrow

Answer 12

Corrugator supercilli

Question 13

Corrugator supercilli origin is frontal bone in the supraorbital region, insertion is skin tissue of the eyebrow. Action?

Answer 13

Draws eyebrow medically and inferiorly towards the nose, creating wrinkles in the flagella region as in frowning

Question 14

Muscle that encircles the mouth

Answer 14

Orbicularis oris

Question 15

Orbicularis oris origin is maxilla and mandible and insertion is skin around the lips. Action?

Answer 15

Closes, rolls inwards and pouts lips outward. Known as the kissing muscle

Question 16

Thin muscle between the maxilla and mandible in the cheek area

Answer 16

Buccinator

Question 17

Buccinator origin is alveolar process of the maxilla/mandible and pterygomandibular raphe, insertion is corner of the mouth. Action?

Answer 17

Keeps food pushed back when chewing, compresses cheeks against the teeth, helps the sucking action and expels air

Question 18

The Buccinator is pierced by which duct

Answer 18

Parotid duct

Question 19

Horizontal muscle around the parotid glad area

Answer 19

Risorius

Question 20

Risorius origin is fascia superficial to masseter muscle and insertion is corner of the mouth. Action?

Answer 20

Stretches lips laterally
* a real smile involves the Risorius, zygomaticus major and minor, levator anguli oris, creating an upward and out stretch of the mouth

Question 21

Broad bands between the nostrils and upper lip

Answer 21

Levator labii superioris

Question 22

Levator labii superioris origin is infraorbital rim of the maxilla, insertion is upper lip. Action?

Answer 22

Elevates the upper lip

Question 23

Broad muscles around the nostrils

Answer 23

Levator labii superioris aleque nasi

Question 24

Levator labii superioris aleque nasi origin is frontal process of the maxilla, insertion is ala of the nose and upper lip. Action?

Answer 24

Elevates the upper lip, dilates the nostril

Question 25

Diagonal muscle along the cheekbone area

Answer 25

Zygomaticus major

Question 26

Zygomaticus major origin is zygomaticus bone, insertion is corner of the mouth. Action?

Answer 26

Elevates the corner of the lips to create a smile

Question 27

Smaller diagonal muscle above the zygomaticus major muscle

Answer 27

Zygomaticus minor

Question 28

Zygomaticus minor origin is zygomatic bone, insertion is upper lip, next to the levator labii superioris muscle. Action?

Answer 28

Elevates the corner of the lips to create a smile

Question 29

Vertical band of muscle between the eye and upper lip

Answer 29

Levator anguli oris

Question 30

Levator anguli oris origin is maxilla and insertion is corner of the mouth. Action?

Answer 30

Elevates the corner of the lips to create a smile

Question 31

Vertical band of muscle between the lower lip and chin

Answer 31

Depressor anguli oris

Question 32

Depressor anguli oris origin is lower border of the mandible, insertion is the corner of the mouth. Action?

Answer 32

Depresses the angle of the mouth, to create a frown

Question 33

Vertical band of muscle between the lower lip and chin; origin is lower border of the mandible and insertion is the skin of lower lip and action is to pull down the lower lip exposing the mandibular incisors

Answer 33

Depressor labii inferioris

Question 34

Central pair of muscles from the lower lip to the chin. Origin is incisive fossa of the mandible and insertion is skin of the chin. Action is to elevate and wrinkle the skin of the chin and protrudes the lower lip

Answer 34

Mentalis

Question 35

Large superficial muscle on the front of the neck, face and chest. Origin is skin superficial to the clavicle and shoulder, insertion is the mandible and muscles of the mouth. Action is to raise the skin of the neck, lowers the corner of the mouth

Answer 35

Platysma