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Flashcards in CN exam Deck (21)
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1

what is visual field confrontation a good test for

Tests globally but also tests for glaucoma too and glaucoma causes tunnel vision so peripheral vision is more impaired

2

what will a lesion to the optic chiasm cause

will cause bitemporal hemianopsia (loss of half of visual field, opposite for both eyes)

3

What will a lesion of the right optic tract/ radiation cause

Left homonymous hemianopsia (gunna lose left visual field)

4

If you shine light in a normal eye will u still get pupil constriction in the blind eye

Yes as sympathetic innervation is still there
(wont work other way around tho)

5

What will you see in papilledema

Pt reports normal vision but lots of swelling and engorgment of optic disc

6

What will you see in glaucoma

increased intraocular presure and optic disc is pushed back

7

What will you see in macular degeneration

Patchiness in retina, no vision in these areas
-progressive blindness

8

What will you see in optic atrophy

White disc indicates atrophy and small blood vessels missing

9

What is anisocoria

Unequal pupil size (20% have it normally)

10

what actiion of the sup oblique

normally- looks down and ou

11

What is the corneal reflex testing

sensory compinent CNV, blinking from CN7

12

What would a peripheral lesion to the facial nerve cause

Would affect entire half of face.

13

what would a central lesion of the facial nerve cause, where does innervation of each quadrent of the face get input from

Some sparing of a quadrent of the face

Upper quad- gets inn from ipsilate and contralat
Lower quad- gets inn from contralat

14

Sensirineural vs conductive hearing loss

Sensirineural- loss of auditory nerve/cochlea
Conductive- problem with sound traveling to inner ear

15

ex. Weber lateralizes to right, Rinne pos bilat (ac>bc)

Left sensirneurla loss

16

What is a pos VOR test

if any dizziness/vertigo/nausea

17

What is a pos VORS test

if any eye mvmts occr, indicating vestibulo cerebellar dysfunction in pts with dizziness/vertigo

18

Results of injury of glossopharyngeal n

Altered taste/smell sensation
choking/dificulty swalowing
loss of parotid sensation

19

components of vagus n

-Sensory to pharynx/larynx
-motor to pharynx/larynx
-parasympathetic-motor/sensory to lung, heat, gi

20

what cn inn uvula and what side will it deviate to in injury

CNX

-deviation to left indicating a right side problem,

21

Protruded tongue will deiate to what side in a problem

deviate to side of problem