disorders of visual processing Flashcards

1
Q

“software” of the visual system

A

visual processing

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2
Q

“hardware of the visual system

A

visual efficiency

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3
Q

visual efficency

A

neurodevelopment of eye tracking accommodation, and binocular vision

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4
Q

visual processing

A

how the eyes interface with the rest of the brain and body (interpret visual stimuli)

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5
Q

disorders of visual sensory pathways

A

lesions of pathways from the retina, optic nerve to the striate cortex

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6
Q

disorder of visual integration

A

due to lesions upstream from the striate cortex

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7
Q

undetermined disorders of visual integration

A

disorders not easily classified in the two former categories

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8
Q

cone dystrophy

A

genetic defect that causes malformation of the cones, slow progressive loss of central vision

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9
Q

cone dystrophy symptoms

A

vision during daytime, photophobia, problems detecting colors, problems with sharp VA

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10
Q

what type of ocular bleeding affects vision

A

macular

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11
Q

homonymous

A

same-side visual field defect

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12
Q

heteronomous

A

opposite-side visual field defect

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13
Q

hemianopsia

A

absence of hemifield of vision

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14
Q

quadrantanopsia

A

abscence of a quadrant of vision

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15
Q

absolute scotoma

A

deep, no response to light in that area no matter how bright the stimulus

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16
Q

relative scotoma

A

area of depressed vision, responds to light but may need brighter stimulus to do so

17
Q

is visual field monocular or binocular?

A

it’s both

18
Q

optic chiasm lesion

A

bitemporal or binasal hemianopsia

19
Q

optic tract lesion

A

loss of contralateral field right or left hemianopsia

20
Q

optic radiation lesion

A

quadrantopsia

21
Q

primary visual cortex lesion

A

typically congruous, either hemianopsia or quadrantopsia (macular sparring)

22
Q

hemi-inattention, hemi-neglect

A

inability to draw half of an object

23
Q

spatial neglect

A

inability to copy an image fully

24
Q

ventral disorders

A

visual object agnosia, prosopagnosia, achromatopsia

25
dorsal disorders
optic ataxia, ocular apraxia, simultanagnosia, constructional apraxia, akinotopsia
26
primary visual sequelae of acquired brain injury
post-trauma vision disorder, midline shift, convergence insufficiency, processing speed, photophobia
27
ischemic stroke
interruption of blood flow to brain
28
visual effects of stroke
visual field defects, agnosias, neglect, cortical blindness, binocular and accommodative problems
29
prosopagnosia
face blindness - posterior commissure artery infarct - fusiform gyrus
30
visual discrimination
difficulty indistinguishing one item from another, confusing or misunderstanding written symbols
31
visual sequencing
inability to see and distinguish the order of symbols, words, or images
32
visual motor processing
inability to use feedback from eyes to coordinate the movement of other parts of the body
33
visual closure issues
difficulty in identifying an object when only parts are visible
34
dyscalculia
difficulties with calculation and number concepts
35
dyslexia
difficulty with reading, writing, spelling word recognition and sequencing
36
dyspraxia/DCD
difficulties with planning movements, co-ordindination, and practical tasks as well as tracking and balance, poor spatial awareness and muscle tone
37
Autistic spectrum disorder (including asperger's syndrome)
social and communication problems, obsessive, difference of imagination