Ch11 The Visual System

Question 1

list the Visual System pathways:

Answer 1

1. Lateral Geniculate nucleus to occipital lobe

2. Extrageniculate fibers initiate – Direct, indirect light reflex, auditory reflex, coordination of gaze

Question 2

Occipital Lobe Areas

Answer 2

17
18
19

Question 3

Area 17 function

Answer 3

the primary visual cortex

Question 4

Area 18 function

Answer 4

secondary visual cortex (visual association cortex) - recognition

Question 5

Area 19 function

Answer 5

for memory to recall the appearance of an object or person not currently in view

Question 6

Assessment of Visual Disturbances consist of how many stpes

Answer 6

2

Question 7

Nature of disturbance: includes

Answer 7

time
progression
are there bright (+) or dark (-) areas

Question 8

Def: non-specific term, can indicate possible scotoma, possible diplopia, possible eye fatigue or many others

Answer 8

Blurry vision

Question 9

Visual acuity testing includes

Answer 9

Blink to threat
Myopia
Hyperopia
Presbyopia
Visual field testing

Question 10

nearsighted 20/80 is called

Answer 10

Myopia

Question 11

farsighted 20/15 is called

Answer 11

Hyperopia

Question 12

old age vision is called

Answer 12

Presbyopia

Question 13

optic nerve and oculomotor nerve testing is called

Answer 13

Visual field testing

Question 14

Bitemporal Hemianopia is loss of

Answer 14

bilateral peripheral vision

Question 15

Bitemporal Hemianopia sight of lesion

Answer 15

optic chiasm

Question 16

Homonymous Hemianopia is loss of

Answer 16

right side of each eye vision

Question 17

Homonymous Hemianopia Lesion site:

Answer 17

left lateral geniculate nucleus problem

Question 18

Left Inferior Quadrantanopia is Loss of

Answer 18

left inferior quadrant of vision

Question 19

Left Inferior Quadrantanopia Lesion site:

Answer 19

right parietal radiations (dorsal stream)

Question 20

Right Superior Quadrantanopia is loss of

Answer 20

right superior quadrant of vision

Question 21

Right Superior Quadrantanopia Lesion site:

Answer 21

left temporal radiations

Question 22

Retinal Vascularity:

Define Amaurosis fugax

Answer 22

brown out of vision descending curtain from TIA

Question 23

Retinal Vascularity is caused by

Answer 23

blockage of the arteries of the retina (TIA in brain)

Question 24

Inferior Fluid Line Hemorrhage causes what defect?

Answer 24

shifting superior visual defect

Question 25

Glaucoma is increased pressure in the

Answer 25

eye

Question 26

Glaucoma happens due to

Answer 26

lack of drainage of aqueous humor

Question 27

Glaucoma signs and symptoms

Answer 27

enlargement of the physiologic cup
Halos
scintillating scotoma
the cup is usually ½ size of disc

Question 28

Bulbar Neuritis aka

Answer 28

Retinitis

Question 29

In Bulbar Neuritis, Funduscopic exam may show

Answer 29

papillitis or optic disc pallor

Question 30

Bulbar Neuritis (Retinitis) Signs and symptoms

Answer 30

monocular central scotoma (blindspot)
onset and progression can be fast or slow
whiteness of the optic disc

Question 31

Bulbar Neuritis recovery usually takes about

Answer 31

6-8 weeks (near 100%)

Question 32

multiple Bulbar Neuritis attacks can lead to

Answer 32

permanent deficit

Question 33

Retrobulbar Neuritis is

Answer 33

Inflammation and demyelination of the optic nerve (MS)

Question 34

Retrobulbar Neuritis Signs and symptoms:

Answer 34

patient under 45 years old; eye pain with movement
tunnel vision
decreased visual acuity (blurry)
decreased color vision (red)