Exam 3: Skull lecture iii

Question 1

orbicularis oris: origin

Answer 1

from maxilla and mandible

Question 2

orbicularis oris: insertion

Answer 2

to mucous membrane of lips

Question 3

orbicularis oris: action

Answer 3

closes oral fissure (space btwn lips) and aids in puckering lips

Question 4

orbicularis ori: innervation

Answer 4

facial nerve

Question 5

buccinator: origin

Answer 5

from mandible, maxilla, and pterygomandibular raphe

Question 6

buccinator: insertion

Answer 6

to angle of mouth

Question 7

buccinator: action

Answer 7

compresses cheeks during blowing and puckering (press cheeks against molar teeth) and help keep food in place during chewing

Question 8

zygomaticus major: origin

Answer 8

from zygomatic arch

Question 9

zygomaticus major: insertion

Answer 9

to angle of mouth

Question 10

zygomaticus major: action

Answer 10

elevate labial commissure (jxn of upper and lower lips); bilateral contraction causes smile; unilateral contraction causes sneer

Question 11

muscles of scalp/facial expression are all innervated by:

Answer 11

the facial nerve

Question 12

levator labii superioris: origin

Answer 12

from maxilla

Question 13

levator labii superioris: insertion

Answer 13

to skin of upper lip

Question 14

levator labii superioris: action

Answer 14

elevate upper lip

Question 15

depressor labii inferioris: origin

Answer 15

From mandible

Question 16

depressor labii inferioris: insertion

Answer 16

to skin of lower lip

Question 17

depressor labii inferioris: action

Answer 17

depress lower lip

Question 18

depressor anguli oris: origin

Answer 18

from mandible

Question 19

depressor anguli oris: insertion

Answer 19

to angle of mouth

Question 20

depressor anguli oris: action

Answer 20

depress labial commissure

Question 21

platysma: origin

Answer 21

from subcutaneous tissue around the clavicle

Question 22

platysma: insertion

Answer 22

to mandible, skin of cheek, and angle of mouth

Question 23

platysma: action

Answer 23

depress mandible; tense skin of inferior face and neck

Question 24

nerves of face and scalp: facial nerve (CN VII): its 5 terminal branches are the _; these supply the muscles of facial expression

Answer 24

temporal, zygomatic, buccal, marginal mandibular, and cervical nerves

Question 25

bell palsy: results from injury to the

Answer 25

facial nerve or its branches

Question 26

bell palsy: the nerve injury produces paralysis of some or all _ on the the affected side

Answer 26

facial muscles

Question 27

bell palsy: symptoms include

Answer 27

distorted facial expression, inadequate lubrication of corena, problems eating and whistling, tears and saliva running from drooping eye and mouth, etc

Question 28

trigeminal nerve (CN V): its 3 divisions provide most of the _ innervation of the face and _ scalp

Answer 28

cutaneous (sensory); anterior scalp

Question 29

trigeminal nerve (CN V): CN V is largely _, but also has a _ portion that supplies the chewing/mastication muscles

Answer 29

largely sensory but motor portion

Question 30

trigeminal nerve (CN V): most of the neurons providing its sensory fibers that enter the CNS have cell bodies in the _

Answer 30

trigeminal ganglion (which is thus a sensory ganglion)

Question 31

ophthalmic nerve (CN V1): one of the 3 main divisions of the _ nerve

Answer 31

trigeminal nerve

Question 32

ophthalmic nerve (CN V1): exits cranium via _ fissure

Answer 32

superior orbital fissure

Question 33

ophthalmic nerve (CN V1): trifurcates into the _, _, and _ nerves

Answer 33

frontal, nasociliary, and lacrimal nerves

Question 34

ophthalmic nerve (CN V1): mostly supplies skin of scalp and face superior to _ and medial to _

Answer 34

superior to lower eyelid and medial to lateral corner of eye

Question 35

ophthalmic nerve (CN V1): the ophthalmic nerve also supplies the eyeball, part of the _ and the _ gland

Answer 35

part of the nose and the lacrimal gland

Question 36

maxillary nerve (CN V2): one of the 3 main divisions of the _ nerve

Answer 36

trigeminal nerve

Question 37

maxillary nerve (CN V2): exits cranium via _, travels a bit, and enters orbit via _

Answer 37

foramen rotundum; inferior orbital fissure

Question 38

maxillary nerve (CN V2): gives rise to _ and _ nerves

Answer 38

zygomatic nerve and infra-orbital nerve

Question 39

maxillary nerve (CN V2): mostly supplies skin from bottom of _ down to _

Answer 39

bottom of upper eyelid down to labial commissure

Question 40

maxillary nerve (CN V2): the maxillary nerve also supplies skin of a bit of the _ scalp, and most of the _

Answer 40

lateral scalp and most of the upper teeth

Question 41

mandibular nerve (CN V3): one of the 3 main branches of the _ nerve

Answer 41

trigeminal nerve

Question 42

mandibular nerve (CN V3): exits the cranium via

Answer 42

foramen ovale

Question 43

mandibular nerve (CN V3): gives rise to _, _, and _ nerves

Answer 43

auriculotemporal, buccal, and mental nerves

Question 44

mandibular nerve (CN V3): mostly supplies skin inferior to _ and part of skin of cheek and _

Answer 44

skin inferior to labial commissure and part of skin of cheek and ear

Question 45

mandibular nerve (CN V3): the mandibular nerve also supplies the _ teeth, and contains _ fibers that supply chewing muscles

Answer 45

lower teeth, motor fibers that supply chewing muscles (masseter, temporalis, medial pterygoid, and lateral pterygoid)

Question 46

trigeminal nerve (CN V): each division of the trigeminal nerve supplies a distinct _ zone, similar to a dermatome, but w/o the overlapping of _ nerves; therefore, injures result in _ areas of paresthesia

Answer 46

sensory zone, adjacent nerves, distinct and defined areas of paresthesia

Question 47

trigeminal nerve (CN V): the divisions of CN V supply sensation not only to the superficial skin of the face but also to _ surfaces of the cornea, nasal cavity, oral cavity, paranasal sinuses, etc

Answer 47

deep mucosal surfaces

Question 48

trigeminal neuralgia (tic douloureux): a sensory disorder of the _

Answer 48

sensory disorder of the sensory portion of CN V

Question 49

trigeminal neuralgia (tic douloureux): characterized by

Answer 49

sudden attacks of excruciating jabs of facial pain

Question 50

trigeminal neuralgia (tic douloureux): _ is most frequently involved (think nerve)

Answer 50

CN V2

Question 51

trigeminal neuralgia (tic douloureux): may be caused by _

Answer 51

demyelination of CN V sensory axons

Question 52

superficial vasculature of face and scalp: the face is richly supplied w/ _ arteries and veins. the terminal branches of both arteries and veins anastomose freely, including across the _ w/ contralateral partners

Answer 52

superficial arteries and veins; midline

Question 53

superficial vasculature of face and scalp: external carotid artery: most _ arteries of the face are branches of it; one of these branches, the _ artery, provide the main arterial supply to the face

Answer 53

superficial arteries, facial artery

Question 54

superficial vasculature of face and scalp: internal carotid artery: gives rise to a couple of _ arteries

Answer 54

forehead

Question 55

CN V1 =

Answer 55

Ophthalmic nerve

Question 56

CN V2=

Answer 56

Maxillary nerve

Question 57

CN V3=

Answer 57

Mandibular nerve