Spatial Organization in the Visual Cortex

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Last updated 9:08 PM on 10/7/26
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14 Terms

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Cortical magnification

Apportioning a large area on the cortex to the small fovea

<p>Apportioning a large area on the cortex to the small fovea </p>
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Cortical magnification factor

  • WHAT% of the retina corresponds to WHAT% of the cortical area

  • Magnification factor is WHAT


Cortical magnification factor

  • 0.01% of the retina corresponds to 10% of the cortical area

  • Magnification factor is 1000X


<p>Cortical magnification factor </p><ul><li><p>0.01% of the retina corresponds to 10% of the cortical area </p></li><li><p>Magnification factor is 1000X</p></li></ul><p></p>
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Stimulation of the small area near the fovea activated a WHAT area on the WHAT (red) than stimulation of the WHAT area in the WHAT (blue).

Stimulation of the small area near the fovea activated a GREATER area on the CORTEX (red) than stimulation of the LARGER area in the PERIPHERY (blue).

<p>Stimulation of the small area near the fovea activated a GREATER area on the CORTEX (red) than stimulation of the LARGER area in the PERIPHERY (blue).</p>
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<p>Orientation of column A</p><ul><li><p>Neurons along this column respond best to WHAT bars </p></li></ul><p></p>

Orientation of column A

  • Neurons along this column respond best to WHAT bars


Orientation of column A

  • Neurons along this column respond best to HORIZONTAL bars


<p>Orientation of column A</p><ul><li><p>Neurons along this column respond best to HORIZONTAL bars </p></li></ul><p></p>
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<p>Orientation column B </p><ul><li><p>Neurons along this column respond best to bars oriented at WHAT</p></li></ul><p></p>

Orientation column B

  • Neurons along this column respond best to bars oriented at WHAT


Orientation column B

  • Neurons along this column respond best to bars oriented at 45 degrees


<p>Orientation column B </p><ul><li><p>Neurons along this column respond best to bars oriented at 45 degrees </p></li></ul><p></p>
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Neurons that a perpendicular electrode passes through

  • These neurons have receptive fields WHAT to each other on the retina, and they respond to the WHAT orientation


Neurons that a perpendicular electrode passes through

  • These neurons have receptive fields CLOSE to each other on the retina, and they respond to the SAME orientation


<p>Neurons that a perpendicular electrode passes through </p><ul><li><p>These neurons have receptive fields CLOSE to each other on the retina, and they respond to the SAME orientation </p></li></ul><p></p>
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Oblique electrode passes through WHAT orientation columns, with each column responding best to a WHAT orientation

Oblique electrode passes through DIFFERENT orientation columns, with each column responding best to a SPECIFIC orientation (preferred orientations change in an orderly way)

<p>Oblique electrode passes through DIFFERENT orientation columns, with each column responding best to a SPECIFIC orientation (preferred orientations change in an orderly way) </p>
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One location column contains a full range of WHAT

One location column contains a full range of ORIENTATIONS

<p>One location column contains a full range of ORIENTATIONS</p>
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A location column is also called a HYPERCOLUMN column

A location column is also called a WHAT column

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Neurons in an ocular dominance column respond preferentially to the WHAT or WHAT

Neurons in an ocular dominance column respond preferentially to the LEFT or RIGHT EYE

<p>Neurons in an ocular dominance column respond preferentially to the LEFT or RIGHT EYE</p>
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What is a hypercolumn

Consists of a PAIR of ocular dominant column (one set from the right eye and one from the left eye)

<p>Consists of a PAIR of ocular dominant column (one set from the right eye and one from the left eye) </p>
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Three parts of a tree trunk fall on three WHAT of the retina, and they correspond to three WHAT in the visual cortex

Three parts of a tree trunk fall on three RECEPTIVE AREAS of the retina, and they correspond to three LOCATION COLUMNS in the visual cortex

<p>Three parts of a tree trunk fall on three RECEPTIVE AREAS of the retina, and they correspond to three LOCATION COLUMNS in the visual cortex </p>
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The principal of representation/transformation

The cortical representation of a stimulus does not resemble the stimulus

<p>The cortical representation of a stimulus does not resemble the stimulus</p>