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Articles

A quantitative measure for short-term cortical plasticity in human vision

MK Kapadia, CD Gilbert and G Westheimer
Journal of Neuroscience 1 January 1994, 14 (1) 451-457; DOI: https://doi.org/10.1523/JNEUROSCI.14-01-00451.1994
MK Kapadia
Department of Neurobiology, Rockefeller University, New York, New York 10021.
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CD Gilbert
Department of Neurobiology, Rockefeller University, New York, New York 10021.
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G Westheimer
Department of Neurobiology, Rockefeller University, New York, New York 10021.
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Abstract

The human visual system is normally very good at determining the relative positions of objects in space, but under certain conditions contextual influences can cause significant errors in this process. We studied spatial localization around an artificial scotoma, a small mask that occludes part of the visual field while a dynamic pattern is shown over a surrounding region, and found that the ability to determine the position of short line segments was strongly biased toward the interior of the scotoma. We attribute this “shift” or misassignment of position to receptive field (RF) expansions within the artificial scotoma as seen in recent physiological studies. Furthermore, our findings show that this shift begins within 1 sec of stimulus presentation, suggesting that RFs are constantly altered by their local context and that these dynamics are a part of normal vision.

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The Journal of Neuroscience: 14 (1)
Journal of Neuroscience
Vol. 14, Issue 1
1 Jan 1994
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A quantitative measure for short-term cortical plasticity in human vision
MK Kapadia, CD Gilbert, G Westheimer
Journal of Neuroscience 1 January 1994, 14 (1) 451-457; DOI: 10.1523/JNEUROSCI.14-01-00451.1994

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A quantitative measure for short-term cortical plasticity in human vision
MK Kapadia, CD Gilbert, G Westheimer
Journal of Neuroscience 1 January 1994, 14 (1) 451-457; DOI: 10.1523/JNEUROSCI.14-01-00451.1994
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