Cranial Nerves MINI EXAM 2

Question 1

carries information from muscles, tissue and
organs, to the CNS
1. Afferent (sensory)
2. Efferent (motor)

Answer 1

Afferent sensory

Question 2

(Kinesthetic sense)
—
Sensations of body position and movement
— Sensory or afferent impulses sent back to brain
— Functions to relay to brain body position, create smooth movements during
chewing or speech (TMJ and muscles of mastication), and intercuspation of teeth (PDL)

Answer 2

Proprioception

Question 3

carries information away from the CNS to muscles,

glands and organs

Answer 3

Efferent Motor

Question 4

carries both sensory and motor impulses

Answer 4

Mixed sensory and motor

Question 5

Regulates functions over which we have no control

1. Somatic
2. autonomic

Answer 5

autonomic

Question 6

fight or flight

— Dilates eyes for better vision — Dry mouth

Answer 6

Sympathetic

Question 7

vegetative system, or rest and digest
— Digestion of food which activates salivary glands — Dilation of blood vessels to allow daily activity — Cranial nerves III, VII, IX and X

Answer 7

Parasympathetic

Question 8

2 divisions of autonomic nervous system

Answer 8

parasympathetic and sympathetic

Question 9

Sensory: sensation of smell from nasal cavity

back to the CNS

Answer 9

Olfactory Nerve

Question 10

sensation of sight from retina back to

CNS

Answer 10

Optic Nerve

Question 11

Motor: supplies motor innervation to 4 of the 6 muscles that move the eyeball Parasympathetic: adjusts lens for close vision and constricts pupils

Answer 11

Oculomtor nerve

Question 12

Motor: innervation to 1 of the 6 muscles that

move the eyeball

Answer 12

Trochlear Nerve

and Abducens

Question 13

Sensory: Taste to anterior 2/3 tongue Motor: Muscles of facial expression (Bell’s Palsy), stylohyoid, post belly of the digastric Parasympathetic: (rest and digest) -Lacrimal gland (via zygomatic and lacrimal nerves) -Minor salivary glands (via greater petrosal) -Submandibular gland -Sublingual gland

Answer 13

Facial

Question 14

A patient has Bell’s Palsy… what nerve was this related too

Answer 14

Facial

Question 15

Sensory: transmits sensations of balance and

hearing back to CNS

Answer 15

Vestibulocochlear

Question 16

Se nsory: General sensation and taste to posterior 1/3 of tongue Motor: Stylopharyngeal muscle Parasympathetic: parotid gland

Answer 16

Glossopharyngeal

Question 17

Se nsory: Taste from epiglottis (posterior portion of tongue) Motor: most of the muscles of:
¨ Pharynx
¨Larynx
¨Soft palate Parasympathetic: cardiac muscle, many glands of the body (thymus)

Answer 17

Vagus

Question 18

Motor: Trapezius muscle, sternocleidomastoid

muscle, muscles of soft palate and pharynx

Answer 18

Accessory

Question 19

Motor: Extrinsic and Intrinsic tongue muscles

Answer 19

Hypoglossal

Question 20

Primary sensation nerve

1. Trigeminal CNV
2. Occulomotor

Answer 20

Trigeminal

Question 21

Largest and most complex of CNs

Answer 21

Trigeminal Nerve

Question 22

Trigeminal Nerve:Sensory originates from the __, traverses
through the trigeminal ganglion
(semilunar or Gasserian ) which is located
near the foramen lacerum on the petrous
portion of the temporal bone

Answer 22

pons

Question 23

Trigeminal V nerve splits into 3 branches. What are they and what is there Motor or sensory or mixed

Answer 23

V1 : Opthalmic-sensory
V2: Maxillary: sensory
V3: Mandibular-mixed

Question 24

Exits the skull via superior orbital fissur is a large division of trigeminal branch

Answer 24

Opthalmic Nerve

Question 25

``` — Serves: — Ethmoid and frontal sinuses — Conjunctiva — Cornea — Skin on forehead — Skin and bridge of nose — Ala and apex of nose — Anterior scalp — Nasal cavity — Eyelids — Eyeball — Orbit — Lacrimal gland ```

Answer 25

V1 Opthalmic

Question 26

V1 Opthalmic Nerve splits into what 3 major branches

Answer 26

Frontal Lacrimal Nasociliary

Question 27

Passes through the skull via foramen | rotundum of sphenoid which V division

Answer 27

Maxillary Division

Question 28

Maxillary division V2 is a. sensory b. mixed c. motor

Answer 28

sensory!

Question 29

V2 maxillary division divdes into 5 large branches?

Answer 29

Zygomatic nerve — Infraorbital nerve — | P. S . A . n e r v e — Greater and lesser palatine nerve — Nasopalatine nerve

Question 30

Travels through inferior orbital | fissure

Answer 30

Zygotmatic Nerve V2

Question 31

V2 zygomatic nerve Exists the orbit and divides into two branches:

Answer 31

— Zygomaticofacial-sensory for the skin of cheeks — Zygomaticotemporal-sensory for the skin on the temples

Question 32

Travels through inferior orbital fissure

Answer 32

V2 Infraorbital nerve

Question 33

V2 Infraorbital nerve divides into 3 branches

Answer 33

``` Travel through maxillary sinuses ASA MSA one that travels through infraorbital foramen Infraorbital nerve ```

Question 34

— Maxillary sinuses — Maxillary anterior teeth — Supporting structures such as alveolar bone, PDL and labial gingiva — This may cross over the midline is it ASA, MSA or Infraorbital nerve

Answer 34

ASA

Question 35

— Maxillary sinuses — Maxillary premolars — MB root of maxillary 1st molar — Supporting structures such as alveolar bone, PDL, and buccal gingiva — This nerve is missing in about 28%, mainly the A.S.A. usually takes over is it ASA, MSA or Infraorbital nerve

Answer 35

MSA

Question 36

— Upper lip — Medial portion of cheek — Lower eyelid — Side of the nose

Answer 36

Infraorbital nerve

Question 37

MB root of 1st molar)

Answer 37

MSA of the V2 infraorbital nerve

Question 38

— Sensory impulses from: — Maxillary sinuses mucous membrane — Maxillary molars (except MB root of 1st molar) — Supporting structures such as alveolar bone, PDL, and buccal gingiva

Answer 38

PSA

Question 39

What bony landmakr is in the way during a PSA

Answer 39

Zygomatic process

Question 40

We never anesthetize the lesser palatine on purpose! | because??

Answer 40

anesthetizes soft palate and tonsils....

Question 41

``` emerges through the lesser palatine foramen and travels posteriorly to innervate: — Soft palate — Palatine tonsil ```

Answer 41

lesser palatine

Question 42

``` posterior teeth We never anesthetize the lesser palatine on purpose! — Greater palatine nerve- em erges through the greater palatine foramen and travels anteriorly to innervate: — Posterior hard palate — Lingual gingiva of maxillary ```

Answer 42

greater palatine

Question 43

— Transmits sensory impulses for: — Nasal septum — Anterior hard palate — Lingual gingiva of the maxillary anterior teeth

Answer 43

V2 Nasopalatine

Question 44

Travels through the nasal cavity, travels along the nasal septum, through the incisive canal, and emerges through incisive foramen

Answer 44

Nasopalatine V2

Question 45

Largest of the three trigeminal nerve branches

Answer 45

V 3 -Mandibular Nerve

Question 46

Exits skull via the foramen ovale on sphenoid

Answer 46

V 3 -Mandibular Nerve

Question 47

``` V 3 -Mandibular Nerve A nterior trunk-divided into one sensory branch and 5 motor branches ``` what is the one sensory branch

Answer 47

buccal nerve Skin of cheeks — Buccal mucosa — Buccal gingiva of the mandibular molars and premolars

Question 48

May serve as afferent for the mandibular 1st molar: need to consider this if IA block fails

Answer 48

Mylohyoid