Cranial Nerves

Question 1

Pupillary reflex

Answer 1

Afferent-2

Efferent-3

Question 2

Marcus gunn pupil

Answer 2

Relative afferent pupillary defect
Optic nerve or retinal injury–
Affected pupil paradoxically dilates after a short time

Question 3

Monocular blindness

Answer 3

MS

Giant cell arteritis

Question 4

Bi temporal hemianopia

Answer 4

Pituitary adenomas

ICA aneurysm

Question 5

Homonymous hemianopia

Answer 5

Post chiasm
Stroke
Abscess
Tumor

SAT

Question 6

In attention CN2

Answer 6

Stroke

Question 7

Diplopia look side

Answer 7

Lateral image from affected eye

Question 8

Diplopia look down

Answer 8

Lower image from affected eye

Question 9

Diplopia look up

Answer 9

Upper image from affected eye

Question 10

Down and out and ptosis PUPIL DILATED

Answer 10

Complete CN3 palsy

Question 11

Complete CN3 palsy

Answer 11

PCA aneurysm

RICP tentorial herniation

Question 12

CN4 palsy

Answer 12

Alone-rare

Orbit trauma

Question 13

Partial CN3 palsy

Answer 13

Diabetes– pupil spared

Question 14

Why pupil sparing partial CN3?

Answer 14

Pial vessels spared which supply parasympathetic

Question 15

CN6 palsy

Answer 15

Skull fracture Petrous bone
Nasopharyngeal carcinoma
RICP (F localizing sign)

Question 16

CN5 DD

Answer 16

Idio- trigeminal neuralgia
Acoustic neuroma
Herpes zoster

Question 17

Deviation jaw CN5 palsy

Answer 17

Deviates towards side of weakness

Question 18

Jaw jerk reflex

Answer 18

Stroke
MS
Tumor

Question 19

Minimal or absent jaw jerk reflex

Answer 19

Normal

Question 20

Brisk jaw jerk reflex

Answer 20

UMN

Question 21

Bells sign

Answer 21

Upward gaze on attempted eye closure

Question 22

LMN 7

Answer 22

Bells
Malignant parotid tumor
Ramsay hunt
Sarcoidosis– often bilateral

Question 23

UMN 7

Answer 23

Stroke

Tumor

Question 24

Conductive hearing loss

Answer 24

Rinnes- AB

Weber- affected ear

Question 25

Sensorineural

Answer 25

Rinnes- normal | Weber- normal side

Question 26

CN8 palsy

Answer 26

XS noise levels Ménière's disease Furosemide Amino glycosides- gentamicin

Question 27

Change in taste

Answer 27

Chorda tympani

Question 28

Loud noises

Answer 28

Nerve to stapedius

Question 29

Bulbar palsy

Answer 29

LMN

Question 30

Pseudobulbar palsy

Answer 30

UMN

Question 31

LMN

Answer 31

``` MND Diptheria Polio GBS Syringobulbia ```

Question 32

UMN

Answer 32

MND Bilateral strokes- internal capsule MS

Question 33

Tongue LMN

Answer 33

Flaccid Wasting Fasciculations

Question 34

Tongue UMN

Answer 34

Spastic | Contracted

Question 35

Drooling and dysphonia... LMN

Answer 35

Tremulous lips

Question 36

Drooling and dysphonia... UMN

Answer 36

Emotional lability

Question 37

Cerebellopontine angle Tumor

Answer 37

Acoustic neuroma | Meningioma

Question 38

Cp angle Tumor

Answer 38

5 7 + 8 5 9+ 10

Question 39

Paget's disease bone

Answer 39

5 7 8

Question 40

Gradenigos syndrome

Answer 40

Complication of otitis media 5,6 Peri orbital unilateral pain-5 Diplopoa-6 Otorrhoea- infection

Question 41

Syringobulbia

Answer 41

Bulbar palsy 9,10,11 Vertigo and nystagmus 8 Facial pain/ sensory loss 5 Sparing 7 Horners Syringomyelia

Question 42

Cavernous sinus thrombosis

Answer 42

3,4,6 5- pain and loss corneal reflex Peri orbital oedema Headache Pro ptosis

Question 43

Causes any cranial nerve palsy

Answer 43

Diabetes Stroke Ms Tumor SLE Sarcoidosis Vasculitis

Question 44

Ptosis unilateral

Answer 44

CN3 Horners Congenital

Question 45

Bilateral ptosis

Answer 45

MG myotonic dystrophy Congenital

Question 46

Opthalmoplegia

Answer 46

``` MG cn palsy Graves Wernicke Progressive supra nuclear palsy ```

Question 47

INO DDX

Answer 47

MS STROKE LYME TCA OD

Question 48

Change in smell

Answer 48

Trauma Frontal lobe Tumor Meningitis