Facial Expression Muscles (upper 1/2)

Question 0

Occipitalfrontalis: origin

Answer 0

Epicranal aponeurosis (fascia on top of cranium)

Question 1

Occipitofrontalis: action and insertion

Answer 1

Action: elevates eyebrows, wrinkles forehead skin

Insertion: skin+subcutaneous tissue of eyebrows and forehead

Question 2

Procerus: action and insertion

Answer 2

Action: downward pull of medial angle of eyebrows (angry), causing transverse wrinkling of bridge of the nose

Insertion: skin between eyebrows

Question 3

Procerus: origin

Answer 3

Nasal bone, upper part of lateral nasal cartilage

Question 4

Orbicularis oculi: actions and insertion

Answer 4

Closes eyelids (like a sphincter…circular muscle)

• palpebral portion: gently closing
• orbital portion: tight closing (wink)

Insertion: skin around orbit margin, superior and inferior tarsal plates

Question 5

Orbicularis oculi: origin

Answer 5

Medial orbital margin
Medial palpebral ligament
Lacrimal bone

Question 6

Nasalis: action and insertion

Answer 6

Action: nostril flares (draws ala towards septum)

Insertion: nasal cartilages

Question 7

Nasalis: origin

Answer 7

Maxilla bone (superior region of canine ridge)

Question 8

Levator labii superioris alaeque nasi: action and insertions

Answer 8

Action: elevate upper lip, open nostril

Insertion: alar cartilage of nose and upper lip

Question 9

Levator labii superioris alaeque nasi: origin

Answer 9

Maxilla bone (frontal process)

Question 10

Anterior auricular muscles: action and insertions

Answer 10

Action: pull ear superiorly and ANTERIORLY

Insertion: helix of the ear

Question 11

Anterior auricular muscles: origin

Answer 11

Temporal fascia (anterior part)

Question 12

Superior auricular muscles: action and insertion

Answer 12

Action: elevates ear

Insertion: auricle (upper part)

Question 13

Superior auricular muscles: origin

Answer 13

Epicranial aponeurosis on side of head

Question 14

Posterior auricular muscle: action and insertion

Answer 14

Action: pull ear superiorly and POSTERIORLY

Insertion: convexity of concha of ear

Question 15

Posterior auricular muscles: origin

Answer 15

Mastoid process

Question 16

What do the insertions of the facial expression muscles have in common?

Answer 16

They act on the face so they all insert somewhere around the face

NO BONY INSERTIONS (may have bony origin)

Question 17

What innervates all the facial muscles?

Answer 17

Facial nerve CNVII branches from the parotid plexus:
Temporal or
Zygomatic 
Buccal 
Mandibular 
Cervical

Question 18

What does the temporal branch of the parotid plexus (formed by facial nerve CNVII) innervate?

Answer 18

Occipitofrontalis

Superior orbicularis oculi

Anterior, superior, and posterior auricular muscles

Question 19

What does the buccal branch of parotid plexus (from facial nerve CNVII) innervate?

Answer 19

Buccinator

Upper lip muscles

Question 20

What does the marginal mandibular branch from the parotid plexus (from facial nerve CNVII) innervate?

Answer 20

Rigorous

Lower lip

Chin

Question 21

What does the cervical branch of the parotid plexus (from the facial nerve CNVII) innervate?

Answer 21

Platysma