cranial nerves - individual nerves

Question 1

CN I: name, exit, modality, function?

Answer 1

olfactory
cribriform plate
sensory (SVS)
smell

Question 2

CN II: name, exit, modality, function?

Answer 2

optic
optic canal
special sensory (SSS)
vision

Question 3

CN III: name, exit, modality?

Answer 3

oculomotor
superior orbital fissure
motor (GSM, GVM)

Question 4

function of CN III?

Answer 4

GSM: 4 of 6 extrinsic eye muscles + levator palpebrae superioris
GVM: pupillary sphincter

Question 5

CN IV: name, exit modality, function?

Answer 5

trochlear
superior orbital fissure
motor (GSM)
superior oblique muscle of eye

Question 6

CN V: name and branches?

Answer 6

trigeminal nerve:
V1: opthalmic
V2: maxillary
V3: mandibular

Question 7

CN V1: name, exit, modality, function?

Answer 7

opthalmic
superior orbital fissure
GSS (sensory)
sensory of face: scalp, forehead, nose

Question 8

CN V2: name, exit, modality, function?

Answer 8

maxillary
foramen rotundum
GSS (sensory)
Cheeks, lower eye lid, nasal mucosa, upper lip, upper teeth and palate

Question 9

CN V3: name, exit, modality, function?

Answer 9

mandibular 
foramen ovale
GSS (sensory) + SVM (specific motor)
GSS: anterior 2/3 tongue, skin over mandible and lower teeth
SVM: muscles of mastication

Question 10

CN VI: name, exit, modality, function?

Answer 10

abducens nerve
superior orbital fissure
motor (GSM)
Lateral rectus muscle only

Question 11

CN VII: name, exit, modality?

Answer 11

facial nerve
internal acoustic meatus –> stylomastoid foramen
motor, specific sensory (GSS, SVS, GSM, GVM - autonomic)

Question 12

CN VII: function?

Answer 12

lacrimal and salivary glands:
GSS: sensation to part of ext. ear
SVS: taste from ant. 2/3 tongue, hard and soft palate.
GSM: muscles of facial expression
GVM: lacrimal, submandibular, sublingual glands and mucous glands of mouth and nose

Question 13

CN VIII: name, exit, modality, function?

Answer 13

Vestibulocochlear
Internal acoustic meatus
special sensory (SSS)
hearing and balance

Question 14

CN IX: name, exit, modality?

Answer 14

Glossopharyngeal
jugular foramen
sensory + motor: general sensory, sepcific sensory, autonomic, motor

Question 15

CN IX: function?

Answer 15

GSS: post. 1/3 tongue, ext. ear, and middle ear cavity
GVS: carotid body and sinus
SVS: taste from post. 1/3 tongue
GVM: parotic gland
SVM: stylopharyngeus (only muscle supplied)

Question 16

CN X: name, exit, modality?

Answer 16

vagus
jugular foramen
sensory + motor: GSS, GVS, SVS, GVM, SVM
(general sensory, motor, autonomic)

Question 17

CN X function?

Answer 17

GSS (sensory): ext. ear, larynx and pharynx
GVSensory: larynx, pharynx and, thoracic & abdominal viscera
SVS (specific sensory): taste from epiglottis region of tongue
GVM: smooth muscles of pharynx, larynx and most of the GI tract
SVM: most muscles of pharynx and larynx

Question 18

CN XI: name, exit, modality, function?

Answer 18

Spinal accessory
jugular foramen
motor
trapezius and sternocleidomastoid

Question 19

CN XII: name, exit, modality, function?

Answer 19

hypoglossal
hypoglossal canal
motor
Intrinsic and extrinsic tongue muscles (except the palatoglossus)