CNS

Question 1

Aniscoria

Answer 1

Asymmetry between the pupils

Question 2

If patient is unable to read top line of a 6m snellen chart, what would be your next steps

Answer 2

3m
1m
counting fingers
gross hand movements
perception of light

Question 3

Direct pupillary reflex- afferent and efferent nerves involved

Answer 3

Afferent-CNII

Efferent-CNIII

Question 4

RAPD

Answer 4

Optic neuritis is MS

Also known as Marcus-Gunn pupil

Question 5

Causes of ptosis

Answer 5

Oculomotor nerve pathology
Horner’s syndrome
Myasthenia gravis
Age-related

Question 6

Jaw jerk reflex- afferent and efferent nerves

Answer 6

Afferent- CN V

Efferent- CN V

Question 7

Corneal reflex- afferent and efferent nerves

Answer 7

Afferent- CN V

Efferent- CN VII

Question 8

Herpes zoster lesions in the external auditory meatus

Answer 8

Ramsay Hunt syndrome

Question 9

Rinnes’ positive

Answer 9

Air condition is better than bone conduction- normal

Question 10

Neural deafness

Answer 10

Air conduction > bone conduction (both air and bone conduction reduced equally)

Question 11

Conductive Deafness

Answer 11

Bone conduction > AIr conduction ‘Rinne’s -ve’

Question 12

Weber’s test- sound is heard louder on the side of the intact ear

Answer 12

Neural deafness

Question 13

Weber’s test- sound is heard louder on the side of the affected ear

Answer 13

Conductive deafness

Question 14

Unterberger/Turning test

Answer 14

Ask patient to march on the spot with arms outstretched and eyes closed- patient will turn towards the side of the vestibular lesion

Question 15

Uvula deviates to the left

Answer 15

Lesion on the left

Question 16

Gag reflex- afferent and efferent

Answer 16

afferent IX

efferent X

Question 17

Tongue deviates to the right

Answer 17

Lesion on the right