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Flashcards in CN exam Deck (21)
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1
Q

what is visual field confrontation a good test for

A

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

2
Q

what will a lesion to the optic chiasm cause

A

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

3
Q

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

A

Left homonymous hemianopsia (gunna lose left visual field)

4
Q

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

A

Yes as sympathetic innervation is still there

wont work other way around tho

5
Q

What will you see in papilledema

A

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

6
Q

What will you see in glaucoma

A

increased intraocular presure and optic disc is pushed back

7
Q

What will you see in macular degeneration

A

Patchiness in retina, no vision in these areas

-progressive blindness

8
Q

What will you see in optic atrophy

A

White disc indicates atrophy and small blood vessels missing

9
Q

What is anisocoria

A

Unequal pupil size (20% have it normally)

10
Q

what actiion of the sup oblique

A

normally- looks down and ou

11
Q

What is the corneal reflex testing

A

sensory compinent CNV, blinking from CN7

12
Q

What would a peripheral lesion to the facial nerve cause

A

Would affect entire half of face.

13
Q

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

A

Some sparing of a quadrent of the face

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

14
Q

Sensirineural vs conductive hearing loss

A

Sensirineural- loss of auditory nerve/cochlea

Conductive- problem with sound traveling to inner ear

15
Q

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

A

Left sensirneurla loss

16
Q

What is a pos VOR test

A

if any dizziness/vertigo/nausea

17
Q

What is a pos VORS test

A

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

18
Q

Results of injury of glossopharyngeal n

A

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

19
Q

components of vagus n

A
  • Sensory to pharynx/larynx
  • motor to pharynx/larynx
  • parasympathetic-motor/sensory to lung, heat, gi
20
Q

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

A

CNX

-deviation to left indicating a right side problem,

21
Q

Protruded tongue will deiate to what side in a problem

A

deviate to side of problem