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Cognitive Science CH6
vision
28
Physiology
Undergraduate 1
02/28/2010

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Cards

Term
retina
Definition
internal surface of eye w/ photoreceptors that convert light to neural signals
Term
rod cells
Definition
low level light, dispersed across retina; motion
Term
cone cells
Definition
color (different wave lenghts), focus; highest concentration at fovea
Term
blind spot
Definition
point where optic nerve leaves the eye
Term
fovea
Definition
highest concetration of cones
Term
V1
Definition
1st stage of processing, retains retina spatial arrangement; rungs through LGN, also geniculostriate pathways
Term
simple cell
Definition
cells respond to light in particular orientation
Term
complex cell
Definition
responds to particular orientation, but not to single point of light
Term
hyper complex cell
Definition
responds to particular orientation and lenght
Term
change blindness
Definition
failure to detect sudden change in visual field
Term
hemanophia
Definition
cortical blindness; half visual field
Term
quadrantanophia
Definition
1/4 visual field blindness, around calcarine fissure
Term
scotoma
Definition
small region of blindness
Term
blindsight
Definition
cannot consciously see stimuli, can perform visual discrimination about chance
Term
v4
Definition
region of extrastriate cortex associated with color perception
Term
v5/MT
Definition
region of extrastriate cortex associated with motion perception
Term
color constancy
Definition
color of object constant even with different lighting
Term
biological motion
Definition
detect if stimulus is animate from movement cues alone
Term
structural description
Definition
memory representation of 3d structure of object
Term
apperceptive agnosia
Definition
failure to understand meaning of object at perceptual level
Term
associative agnosia
Definition
failure due to deficit at semantic level
Term
integrative agnosia
Definition
failure to integrate parts into whole in visual perception
Term
IT
Definition
infero temporal cotext; codes for object constancy; takes input from geniculostriate pathway
Term
object orientation agnosia
Definition
inability to extract orientation
Term
category specificity
Definition
brain represents different categories in different ways
Term
face recognition unit
Definition
stored knowledge of 3d face structure
Term
person identity nodes
Definition
abstract description of people, links perceptual with semantic knowledge
Term
prosopagnosia
Definition
cannot regonzie previously familiar faces
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