Cranial Nerves

Question 1

CNI name, origin, exit, function

Answer 1

Name - Olfactory

Origin -Olfactory Bulb

Exit - Cribiform Plate of ethmoid

Function - Smell

Question 2

CNII

name, origin, exit, function

Answer 2

Name - Optic

Origin - LGN

Exit - Optic Canal

Function - Vision

Question 3

CNIII

name, origin, exit, function

Answer 3

Name - Occulomotor

Origin - tegmentum

Exit - S.O.F

Function - LR6, SO4, 3

Question 4

CNIV

name, origin, exit, function

Answer 4

Name - trochlear

Origin - tegmentum

Exit -S.O.F

Function - LR6, SO4, 3

Question 5

CNV

name, origin, exit, function

Answer 5

Name - Trigeminal. This divides at Meckels Cave

Origin - Pons. This becomes V1 - Opthalmic, V2 - Maxillary, V3 - Mandibular

Exit - V1 - S.O.F, V2 - Foramen rotundum, V3 -foramen Ovale

Function - V1 - Sensory to forehead and scalp, V2 - sensory to nose and upper lip, V3 - Sensory and motor to jaw

Question 6

CN VI

name, origin, exit, function

Answer 6

Name - Abducens

Origin - Pons

Exit - S.O.F

Function - LR6, SO4, 3

Question 7

CNVII

name, origin, exit, function

Answer 7

Name - Facial

Origin - Pons

Exit - Internal Acoustic Meatus

Function - Facial movement. Sensation to anterior 2/3 tongue

Question 8

CN VIII

name, origin, exit, function

Answer 8

Name - Vestibulocochlear

Origin - Pons

Exit - IAM

Function - hearing and balance

Question 9

CNIX

name, origin, exit, function

Answer 9

Name - Glossopharyngeal

Origin - Medulla

Exit - Jugular foramen

Function - gag reflex, sensation poserior 1/3 tongue

Question 10

CNX

name, origin, exit, function

Answer 10

Name - Vagus

Origin - Medulla

Exit - JF

Function - Sensory to organs and motor to larynx via recurrent laryngeal nerve to which damage causes hoarseness.

Damage to superior laryngeal causes a loss of pitch via external laryngeal and cricothyroid

Question 11

CNXI

name, origin, exit, function

Answer 11

Name - Accessory

Origin - Medulla

Exit - JF

Function - SCM, trapezius

Question 12

CNXII

name, origin, exit, function

Answer 12

Name - Hypoglossal

Origin - Medulla

Exit - Hypoglossal canal

Function - tongue movement. Damaged tounge pertrudes toward damaged side

Question 13

What are the futher trigeminal divisions

Answer 13

V1 (frontal, suprarobital) V2, V3

Question 14

What is the ciliary ganglion?

Answer 14

Question 15

What is the cavernous sinus?

Answer 15

Question 16

What nerves pass through the SOF?

Answer 16

Luscious French Tarts Sit Nakedly in Anticipation

Lacrimal

Frontal

Trochlear

Superior Division of occulomotor

Nasociliary

Inferior branch of occulomotor

Abducens

Question 17

Which CN innervates the parotid?

Answer 17

Glossopharyngeal via the otic ganglion

Question 18

Which CN innervates the submandibular?

Answer 18

Facial (chorda tympani)