Cranial nerves

Question 1

I

Answer 1

Olofactory
SS -nose smell

Cerebrum
Cribfriform plate

Question 2

II

Answer 2

Optic
SS - sight
Cerbrum
Optic canal

Question 3

III

Answer 3

Ocleomotor
M
SM - all extrinsic eye muscles except lateral rectus + SO

PM- Sphincter pupille and cilliary muscles
pupillary constriction

Midbrain
SOF

Question 4

IV

Answer 4

Troclear
M
SM - SO (down and out)
Smallest cranial nerve

post surface mid brain
SOF

Question 5

V

Answer 5

Trigeminal
S+M

Pons

V1 ophthalmic sensory scalp and forehead and nose (somatic sensory)
SOF

V2 maxillary somatic sensory to lower lid cheeks upper lip and teeth
Foramen rotundum

V3 Mandibular Somatic motor to muscles of mastication
GS anterior 2/3 tongue

Question 6

VI

Answer 6

Abducens
Motor
Lateral rectus

pons medullary junction
SOF

Question 7

VII

Answer 7

Facial - all 4
SS, GS, SM, Parasympathetic

GS - pinna external ear
SS- taste anterior 2/3 tongue
SM - muscles facial expression
parasympathetic sublingual, submanidibular, lacrimal + glamds mucosa

Pons medullary junction
IAM

Question 8

VIII

Answer 8

Vestibulocochlear
Special sensory
sense balance + hearing sensors inner ear temporal bone

Pons medullary junction
IAM

Question 9

IX

Answer 9

Glossopharangeal
All 4
SS, GS, SM + paraympathetic

GS post 1/3 tongue, sensation ext ear and middle cavity
SM stylopharyngeus
SS taste post 1/3 tongue
parasympathetic - parotid gland

pons medullary junction
jugular foramen

Question 10

X

Answer 10

Vagus
All 4
SS epiglottis tongue
GS sensation pinna
SM pharnx + larynx

Parasympathetic thoracic + abdominal viscera

Medulla
jugular foramen

Question 11

XI

Answer 11

Spinal accessory
SM - Traps and SCM

Lateral aspect spinal chord + brainstem
Jugular foramen

Question 12

XII

Answer 12

Hypoglossal
SM
Extrinsic + intrinsic muscles tongue

Central medulla - hypoglossal cannal