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25 Cards in this Set
- Front
- Back
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Cells in the _______ detect points of light
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Retina
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Shape is made in your _______.
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Cortex
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What are the two kinds of cells in the Retina?
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1. On-center cells
2. Off- center cells |
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On-Center Cells
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Excited by a spot of light in the center, light on surround inhibits the cell, spot of light across whole cell = weak excitatory signal
*Kind of cell in the retina |
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Off-Center Cells
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Exact opposite of On-Center Cells
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The cells in the in the retina ______ each other
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overlap, Each cell sends out different signal
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Cells tell the brain about the ______ of light hitting a certain spot on the retina compared with a retina as a whole.
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amount
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Since cells tell the brain about the amount of light hitting a certain spot on the retina compared with the retina as a whole, this mean that_____________________________________________________________. Which results in______.
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Equal weight was not given to all areas of the visual field.
B) Edges |
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What lobe do points of light go into?
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Occipital Lobe
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_________ is in the eye, _________ is in the brain.
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A) sensation
B) Perception |
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What happens once the points of light go into the Occipital lobe?
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There are orientation detectors,
Dots are translated into bars, and neurons are arranged into columns. |
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Orientation Detectors
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Excited by bars of light oriented in different directions
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In the occipital lobe, dots are translated into ______.
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bars
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In the occipital lobe, neurons are arranged in ______.
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Columns.
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Once sight moves on to the Temporal Lobe, this is where...
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You will respond to complex shapes
Only activated with additional signals of orientation, size, color, and texture -Especially used for faces and hands -Neurons are in columns Responds to slight difference in the object |
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In the Temporal lobe, Neurons are in columns, meaning they_____________________________________.
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Respond to slight difference within the object
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Trichromats
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Red, Green, and Blue
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What are the two ways to mix light?
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1. Subtractive Color Mixing
2. Additive Color Mixing |
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Subtractive Color Mixing
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taking away light
= darker color |
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Additive Color Mixing
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-all colors
= white! |
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Trichromatic Theory
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Colors that we see are determined by relative responses of different cone types. If all 3 cone types respond, results in white
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Opponent- Process Theory
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Colors linked in cells-> same respond to red, inhibited by green and reverse.
Some respond to blue, inhibited by yellow and reverse. |
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60% of cones are...
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have the two cones linked together.
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In the Visual Cortex, we have to _________ _________.
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Process color.
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Visual Cortex:
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Color sensitive cells in columns---> amont object recognizing columns: Modules.
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