Color, Motion and Shape, extrastriate visual areas
14 important questions on Color, Motion and Shape, extrastriate visual areas
Why do some people see the dress as white and gold and others as black and blue?
Your brain does not have sufficient information about the lighting conditions:
- is this bright sunlight (so that the dress is in the shade)?
- Is everything overexposed (so that the dress is in the sunlight?
What happens when you have lesions in V4/v8?
(different from retinal color blindness: all color is gone, things look very depressing)
Medial Superior Temporal (MST) neurons respond to?
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What is akinetopsia? Where is the damage?
- Bilateral MT, MST, STS lesions
What happens when you use TSM on MT (V5)?
What other problems than color vision can someone with achromatopsia have?
The Lateral Occipital Cortex (LOC) responds to shapes that are:
- Responds to shapes from motion stimuli (but doesn't respond to motion itself)
Where are face selective cells in monkeys? And where in humans?
- Humans: Medial temporal lobe (FFA)
Hierarchical coding hypothesis of visual perception:
What is the combinatorial explosion problem?
Ensemble coding theory:
What are computational problems in vision?
- Object constancy
What are the 2 models for object recognition?
- Problems: Heavy burden on memory, difficult to recognize objects in unusual views
View independent frame of reference: Match visual input with abstract memory representation of an object
- Problems: Less burdon on memory, but object more easily confused
What area's show what repitition priming?
Right anterior & posterior fusiform gyri: RP for objects of only different size (not viewpoint --> Size invariant coding, no viewpoint invariant coding
Left anterior & posterior fusiform gyri: Viewpoint invariant coding; RP for differen viewpoints
Left inferior frontal gyri: Exemplar invariant coding: RP for objects in the same class
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