Innervations and Actions Practical 2

Question 1

Innervation: temporal branches of facial nerve

Answer 1

frontalis belly; epicranius,
corrugator supercilii,
superior auricular,
temporoparietalis

Question 2

Innervation: temporal and zygomatic branches of facial nerve

Answer 2

orbital part, orbicularis oculi

palpebral part, orbicularis oculi

Question 3

Innervation: superior buccal branches of facial nerve

Answer 3

levator labii superioris
levaltor labii superioris alaeque nasi
zygomaticus minor
zygomaticus major
levator anguli oris
buccinator

Question 4

Innervation: buccal and mandibular branches of facial nerve

Answer 4

orbicularis oris

risorius

Question 5

Innervation: mandibular branches of facial nerve

Answer 5

mentalis
depressor labii inferioris
depressor anguli oris

Question 6

Innervation: oculomotor nerve

Answer 6

levator palpebra superioris
superior rectus
inferior rectus
medial rectus
inferior oblique

Question 7

Innervation: abducent nerve

Answer 7

lateral rectus

Question 8

innervation: trochlear nerve

Answer 8

superior oblique

Question 9

innervation: posterior auricular branch of facial nerve

Answer 9

posterior auricular

occipitalis belly; epicranius

Question 10

Innervation: anterior and posterior deep temporal branches, mandibular division, trigeminal nerve

Answer 10

temporalis

Question 11

innervation: masseteric branch, mandibular division, trigeminal nerve

Answer 11

masseter

Question 12

innervation: medial pterygoid branch, mandibular division, trigeminal nerve

Answer 12

medial pterogoid

Question 13

innervation: lateral pterygoid branch, mandibular division, trigeminal nerve

Answer 13

lateral pterygoid

Question 14

innervation: ventral rami c2-c6

Answer 14

anterior scalene

Question 15

innervation: ventral rami c3-c8

Answer 15

middle scalene

Question 16

action: pulls scalp forward; wrinkles forehead and raises eyebrows

Answer 16

frontalis belly; epicranius

Question 17

pulls scalp backward

Answer 17

occipitalis belly; epicranius

Question 18

depress eyebrows medially

Answer 18

procerus

Question 19

compress cartilage at bridge of nose

Answer 19

compressor naris

Question 20

widens, dilates nostrils and anterior nasal aperture

Answer 20

dilatator naris

Question 21

draws eyebrow medial and down (forms vertical furrow between eyebrows)

Answer 21

corrugator supercilii

Question 22

raises and everts upper lip

Answer 22

levator labii superioris

Question 23

raises and everts upper lip, dilates nostril

Answer 23

levator labii superioris alaeque nasi

Question 24

raises upper lip; produces nasolabial groove

Answer 24

zygomaticus minor

Question 25

draws angle of mouth up and out

Answer 25

zygomaticus major

Question 26

raises angle of mouth; produces nasolabial groove

Answer 26

levator anguli oris

Question 27

close mouth; purse and protrude lips

Answer 27

orbicularis oris

Question 28

compress cheeks against teeth

Answer 28

buccinator

Question 29

draws back angle of mouth

Answer 29

risorius

Question 30

raises and protrudes lower lip

Answer 30

mentalis

Question 31

draws lower lips down

Answer 31

depressor labii inferioris

Question 32

draws corner of mouth down and out

Answer 32

depressor anguli oris

Question 33

elevates upper eyelid

Answer 33

levator palpebra superioris

Question 34

elevate and adduct the cornea; intorsion

Answer 34

superior rectus

Question 35

depress and adduct the cornea; extorsion

Answer 35

inferior rectus

Question 36

adducts cornea

Answer 36

medial rectus

Question 37

abducts cornea

Answer 37

lateral rectus

Question 38

depress and abduct the cornea; intorsion

Answer 38

superior oblique

Question 39

elevate and abduct the cornea; extorsion

Answer 39

inferior oblique

Question 40

elevate and retract mandible

Answer 40

temporalis

Question 41

elevate and protract mandible

Answer 41

masseter

Question 42

elevate and protract mandible; assists in gliding or rotatory movement

Answer 42

medial pterygoid

Question 43

protracts mandible; pulls disc forward; depress chin and assist in gliding or rotatory movement

Answer 43

lateral pterygoid

Question 44

what is the layer between the integument and the bellies of the epicranius

Answer 44

galea aponeurotica

Question 45

how many parts are their to the orbicularis oculi

Answer 45

2 palpebral orbital