Term
| Left vs. right eye information remains separate in the neural tract until it reaches what layer of the sensory cortex? |
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Definition
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Term
| What is the function of the mixing of left vs. right eye signals in the sensory cortex? |
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Definition
| Comparison of left vs. right images plays an important role in depth perception |
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Term
| The size of the cortex dedicated to processing a section of the visual field is directly related to what? |
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Definition
How close that area is to your center of focus
Example: The fovea, while representing a small part of the visual field, also represents your center of focus so therefore has the largest cortex area dedicated to it |
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Term
| Explain the column organization of receptive fields |
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Definition
| In the cortex, as you travel vertically down a part of the cortex (a column of it), each column is dedicated to sensing particular line orientations. As you travel left to right in the cortex (into different columns), your line orientation sensitivity varies. |
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Term
| In what layer(s) of the sensory cortex is color processed? |
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Definition
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Term
| Explain the concept of ocular dominance columns |
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Definition
| Column of the eye, while selective to line orientation, are also distinct in what eye they process information from. Certain columns selectively process right eye info while others selectively process left eye info. |
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Term
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Definition
| The inability to recognize faces. Caused by lesions to a certain part of the visual sensory cortex. Different aspects of the cortex integrate different types of visual information (color, motion, faces, etc.) |
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Term
| The dorsal vision pathway integrates and comprehends what characteristic of our visual field? Where is it processed? |
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Definition
- The "where" aspect (ex. movement)
- Also called the spatial vision pathway
- Parietal lobe |
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Term
| The ventral vision pathway integrates and comprehends what characteristic of our visual field? Where is it processed? |
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Definition
-The "what" part (ex. color, depth)
-Also called the object recognition pathway
- Goes to the temporal lobe |
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Term
| What are the 3 pathways initiated at the retina? |
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Definition
| Magnocellular, Parvocellular, and Koniocellular |
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Term
| What is the function of the M pathway and where does it project to, and via which of the 2 vision pathways? |
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Definition
M has high temporal resolution and identifies the gross features of movement
It goes to layer 4C alpha and is in the doral pathway |
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Term
| What is the function of the P pathway and where does it project to, and via which of the 2 vision pathways? |
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Definition
P cells have high spatial acuity and small receptor fields and help analyze color and fine detail.
They go to layer 4C beta and are also in the ventral pathway |
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Term
| What is the function of the K pathway and where does it project to, and via which of the 2 vision pathways? |
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Definition
| K cells analyze color from a specific class of cones and go to layers 2 and 3. They are involved in the ventral pathway. |
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Term
| What are stereoscopic cues and what aspect of vision do they affect? |
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Definition
Depth perception (What objects are closer and farther then others) - no idea why I felt the need to define depth perception right there
Objects behind your point of focus hit to the nasal side of your fovea while objects closer then your point of focus hit the retina to the lateral side of the fovea, allows detection of near vs. far |
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Term
| What compound confers color specificity of cones? |
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Definition
| Opsin adds wavelength selectivity to rhodospin |
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Term
| How many opsins types are there in the human eye? |
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Definition
3 (trichromatic)
Only 2 are necessary, but 3 improves color distinction |
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