Muscles of facial expression

Question 1

occipitofrontalis

Answer 1

• this is also called the epicranius
• this wraps from the frontal bone to the occipital bone
• it has two bellies (frontal and occipital)
• it is typically used for surprise, curiosity facial expressions

Question 2

frontal belly of occipitofrontalis

Answer 2

this elevates the eyebrows and wrinkles the scalp

Question 3

occipital belly of occipitofrontalis

Answer 3

this retracts the scalp

Question 4

epicranial aponeurosis

Answer 4

this is the connection of the two muscle bellies of the occipitofrontalis

Question 5

corrugator supercilii

Answer 5

this is a muscle of the eye

• this pulls the eyebrows inferiorly and medially
• creates vertical wrinkles above the nose

Question 6

orbicularis oculi

Answer 6

• this is really large and round above the eye

- the acts to close the eyelids; blinking squinting; draws the eyebrows inferiorly

Question 7

levator palpebrae superioris

Answer 7

• this acts to elevate the upper eyelid
• this muscle is deep
• this is the only muscle not innervated by the facial nerve
• this is innervated by the oculomotor nerve (cranial nerve 3)

Question 8

procerus

Answer 8

• this is a muscle of the nose
• it acts to depress medial eyebrows and wrinkles skin over the nose
• this is used to display dislike or distain

Question 9

nasalis

Answer 9

• this is a muscle of the nose
• it has two parts, a transverse part and an alar part
• compresses the bride and depresses the tip of the nose, elevates corners of the nostrils
• allows for the flaring of nostrils

Question 10

buccinator

Answer 10

• this is a deep muscle
• it is a muscle of the mouth but it is not a muscle of mastication
• this muscle draws the cheek inward and allows for whistling or sucking; it draws the mouth laterally; holds food in when chewing

Question 11

levator anguli oris

Answer 11

this acts to widen the oral fissue, elevates the corners of the mouth

• this assists with smiling

Question 12

levator labii superioris

Answer 12

• this opens lips; elevates and furrows the upper lip

- this is associated with sadness

Question 13

levator labii superioris alaeque Nasi

Answer 13

this acts to elevate the upper lip and dilates nostrils

• this is making the elvis snarl (raising the upper lip on one side)

Question 14

zygomaticus major

Answer 14

this acts to raise the lateral corners of the mouth

• this causes smiles

Question 15

zygomaticus minor

Answer 15

this raises the lateral corners of the mouth

• this causes smiles

Question 16

depressor anguli oris

Answer 16

this acts to draw the corner of the mouth inferiorly and laterally

• this causes a frown

Question 17

depressor labii inferioris

Answer 17

this depresses the lower lip

• this causes a frown

Question 18

orbicularis oris

Answer 18

this closes lips; purses and protrudes lips (kissing or whistling)
- this is the big muscle encircling the mouth

Question 19

risorius

Answer 19

this draws the corner of the lip laterally and down and tenses the lips

• this causes kind of an inbetween a smile and a frown, more of a flat mouth

Question 20

mentalis

Answer 20

this elevates and wrinkles skin of the chin, protrudes lower lip

Question 21

platysma

Answer 21

this tenses skin on the inferior face and neck and depresses the jaw