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PSYC2360 > 10: VISUAL STREAMS > Flashcards

10: VISUAL STREAMS Flashcards

1
Q

2 VISUAL STREAMS

A
  1. DORSAL STREAM
  2. VENTRAL STREAM
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2
Q

visual stream that = system of interconnected regions of visual cortex involved in perception of SPATIAL LOCATION

A

DORSAL STREAM

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3
Q

STRIATE CORTEX → POSTERIOR PARIETAL CORTEX

A

PATHWAY OF DORSAL STREAM

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4
Q

WHERE STREAM: provides visual info that guides navigation/mvmts directed toward objects

A

DORSAL STREAM FUNCTION

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5
Q

visual stream that = system of interconnected regions of VISUAL CORTEX involved in perception of FORM

A

VENTRAL STREAM

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6
Q

STRIATE CORTEX → INFERIOR TEMPORAL CORTEX

A

PATHWAY OF VENTRAL STREAM

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7
Q

WHAT STREAM: provides visual info abt size/shape/colour/texture of objects

A

VENTRAL STREAM FUNCTION

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8
Q

theory that:
DORSAL STREAM = vision-for-ACTION
VENTRAL STREAM = vision-for-perception

A

PERCEPTION VS ACTION MODEL (GOODALE + MILNER)

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9
Q

blindness in RIGHT EYE

A

RIGHT EYE BLINDNESS

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10
Q

blindness in both TEMPORAL (OUTER) visual fields

A

BITEMPORAL BLINDNESS

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11
Q

blindness in both LEFT visual fields

A

LVF HEMIANOPIA

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12
Q

blind spot/partial loss of vision

A

SCOTOMA

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13
Q

entire QUADRANT of visual field = blind

A

QUADRANTOPOA

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14
Q

entire SIDE of visual field = blind

A

HEMIANOPIA

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15
Q

ability of person who CANNOT see objects in their blind field to ACCURATELY IDENTIFY facial expressions of emotion while remaining UNCONSCIOUS of perceiving them

A

BLINDSIGHT

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16
Q

BLINDSIGHT = caused by damage to ___

A

VISUAL CORTEX

17
Q
  • synchronizing bhvr cycles of day/night
  • coordinating eye mvmts
    -directing attn
  • reaching/grasping
A

OTHER UNCONSCIOUS VISUAL PROCESSES

18
Q

deficits in visual perception in ABSENCE of blindness caused by damage to parts of EXTRASTRIATE CORTEX that contribute to VENTRAL STREAM

A

VISUAL AGNOSIA

19
Q

2 TYPES OF AGNOSIA

A
  1. APPERCEPTIVE AGNOSIA
  2. ASSOCIATIVE AGNOSIA
20
Q

agnosia/impairment in MATCHING/COPYING

A

APPERCEPTIVE AGNOSIA

21
Q

agnosia/impairment in ASSOCIATING image w NAME (but matching/copying = preserved)

A

ASSOCIATIVE AGNOSIA

22
Q

agnosia of face recognition assoc w damage to INFERIOR aspect of OCCIPITOTEMPORAL CORTEX in region of FUSIFORM GYRUS

A

PROSOPAGNOSIA

23
Q
  • damaged VENTRAL STREAM = VISUAL FORM AGNOSIA
  • intact DORSAL STREAM = intact visuomotor CONTROL
A

PATIENT DF

24
Q

agnosia in which you CANT identify object SHAPE

A

VISUAL FORM AGNOSIA

25
Q

inability to POINT/GRASP targets under VISUAL GUIDANCE

A

OPTIC ATAXIA

26
Q

damage to ____ STREAM = VISUAL FORM AGNOSIA
damage to ____ STREAM = OPTIC ATAXIA

A

VENTRAL; DORSAL

27
Q
  • damaged DORSAL STREAM = OPTIC ATAXIA
  • can close eyes + touch nose but CANT reach out to touch object
A

PATIENT RV

28
Q

Which VIS STREAM processes info abt objects SIZE to calibrate GRIP APERTURE (how wide to open hand to grip an object)?

A

DORSAL STREAM

29
Q

presentation of 2 shapes + asking if shapes = same/diff

A

PERCEPTUAL DISCRIMINATION TASK

30
Q

PATIENT DF/PATIENT RV’S RESULTS OF PERCEPTUAL DISCRIMINATION TASK

A

DF: CANT tell whether shapes =same/diff (CANT do perception)
RV: CAN tell whether shapes = same/diff (CAN do perception)

31
Q

patients grasp object/shape where grasp line runs directly thru CENTRE of object

A

GRASP TASK

32
Q

PATIENT DF/PATIENT RV’S RESULTS OF GRASP TASK

A

DF: CAN grasp object w STABLE grasp bc DORSAL STREAM INTACT
RV: CANT grasp object w STABLE grasp bc DORSAL STREAM = DAMAGED

33
Q

OBJECT STRUCTURE PROCESSING: object recognition
SPATIAL LOCATION PROCESSING: spatial location

A

OBJECT STRUCTURE/SPATIAL FUNCTIONS OF VENTRAL STREAM

34
Q

OBJECT STRUCTURE PROCESSING: grasp aperture/stability
SPATIAL LOCATION PROCESSING: reach location

A

OBJECT STRUCTURE/SPATIAL FUNCTIONS OF DORSAL STREAM

PSYC2360 (17 decks)

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