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15 Cards in this Set

  • Front
  • Back
Objective

Offer two possible explanations for the phenomenon of blindsight.
See study guide.
Objective

Distinguish between the ventral and dorsal streams.
See study guide.
Objective

Compare the function of simple cells, complex cells, and hypercomplex cells.
See study guide.
Objective

Identify the role of the inferior temporal cortex in visual processing.
Cells in this area detect an object, no matter how it is displayed, and not the amount of light and darkness in any location on the retina.

The ability of inferior temporal neurons to ignore changes in size and direction probably contributes to our capacity for shape constancy—the ability to recognize an object’s shape even as it changes location or direction.
primary visual cortex (V1)
Area located in the occipital cortex responsible for the first stage of visual processing
blindsight
An ability to respond in some ways to visual information that they report not seeing
secondary visual cortex (V2)
Processes information received from V1 and transmits it to additional areas
ventral stream
The “what” pathway in the temporal cortex, because it is essential for identifying and recognizing objects
dorsal stream
The “where” or “how” pathway, because it helps the motor system find objects and determine how to move toward them, grasp them, and so forth
simple cells
Cells that are found exclusively in the primary visual cortex

The receptive field of a simple cell has fixed excitatory and inhibitory zones.
complex cells
Cells that are located in either area V1 or V2 and have receptive fields that cannot be mapped into fixed excitatory and inhibitory zones
hypercomplex cells
Cells that have a strong inhibitory area at one end of its bar-shaped receptive field; the cells respond to a bar-shaped pattern of light anywhere in its broad receptive field provided that the bar does not extend beyond a certain point
feature detector
Neurons whose responses indicate the presence of a particular feature
inferior temporal cortex
Area that contains cells with huge receptive fields

Cells respond to complex shapes
shape constancy
Ability to recognize an object’s shape even as it changes location or direction