occipital lobe Flashcards

1
Q

blobs perceive ___ and inter blobs perceive ___

A

color, form and motion

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2
Q

blobs and interbolbs are located where

A

primary visual cortex (V1)

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3
Q

Primary visual cortex receives info from ___ and outputs to ___

A

LGN, other occipital areas

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4
Q

thin stripes are ___ and thick/pale stripes are ______

A

color perception, form and motion

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5
Q

stripes are found where

A

secondary visual cortex

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6
Q

the “how” and “where” stream

A

Dorsal

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7
Q

stream responsible for guiding grasping movements

A

dorsal

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8
Q

the “what” stream

A

Ventral

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9
Q

the area of the ventral stream responsible for object perception

A

inferior temporal cortex

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10
Q

the area of the ventral stream responsible for body movements

A

superior temporal cortex

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11
Q

three output pathways of the secondary visual cortex

A

output to parietal lobe (dorsal)
output to inferior temporal lobe (ventral)
output to superior temporal lobe (ventral)

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12
Q

T/F the left half of each retina gets info from right visual field and sends projections to the left brain

A

True

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13
Q

macular sparing is due to damage where?

A

unilateral damage to visual cortex

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14
Q

what part of the visual field is spaired in macular sparing

A

the central region

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15
Q

lesion in this vision area causes loss of colour cognition , can’t see or recall colour

A

V4 damage

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16
Q

lesion in this vision area causes inability to see objects in motion

17
Q

inability to recognize and object despite being able to perceive it

A

associative agnosia

18
Q

where might brain damage be in associative agnosia

A

anterior temporal lobe – ventral stream

19
Q

inability to recognize an object despite basic visual function like its colour shape and size

A

apperceptive agnosia

20
Q

apperceptive agnosia is the failure to perceive the object where as associative agnosia is not

21
Q

Apperceptive agnosia is caused by damage to which area

A

occipital lobe damage

22
Q

someone who struggles with copying or matching objects as well as is unable to combine individual aspects to make a whole suffers from what

A

apperceptive agnosia

23
Q

someone who cannot name an object but is able to recognize differences between objects an copy the object suffers from what

A

associative agnosia

24
Q

inability to recognize faces

A

prosopagnosia

25
Alexia is caused by damage to...
left fusiform and lingual areas
26
a patient is unable to recognize written words but struggles less with seeing them letter by letter
Alexia
27
if you are cortically blind you would have a lesion __
in area V1
28
blindness to half the visual field due to damage in V1
hemianopia
29
loss of vision in one quadrant of visual field
quadrantanopia
30
person cannot see the medial half of their visual field (closest to the nose)
right nasal hemianopia
31
vision is missing from the outer half of both the right and left visual fields
bitemporal blindness
32
visual disturbances such as blindness, dimming, fogging, blurring occurring to an eye for seconds to minutes
monocular blindness
33
retention of macular function despite losses to adjacent visual fields
monocular sparing