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Cognitive and neural influences on t...

Esterman, Michael Scott.

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Cognitive and neural influences on the perceptual integration of color and shape.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Cognitive and neural influences on the perceptual integration of color and shape./
Author:	Esterman, Michael Scott.
Description:	99 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1302.
Contained By:	Dissertation Abstracts International68-02B.
Subject:	Biology, Neuroscience. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3253850

Cognitive and neural influences on the perceptual integration of color and shape.
Esterman, Michael Scott.

Cognitive and neural influences on the perceptual integration of color and shape. - 99 p.

Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1302.

Thesis (Ph.D.)--University of California, Berkeley, 2006.

We perceive the visual world as consisting of unified whole objects. However there is a wealth of evidence suggesting that veridical perception of the world requires both the processing of its individual features as well as the spatial integration of those features into bound objects. This dissertation focuses on situations in which this ability to integrate features is compromised, resulting in illusory combinations of features, known as illusory conjunctions. Semantic meaning, or categorical information, influences how these illusions can occur. Specifically, forms with similar meaning are more likely to have their colors misconjoined. Magnetic brain stimulation was used to examine how specific regions of the parietal cortex are critical for feature integration. Stimulation of a specific region of the brain, the right intraparietal sulcus, affected the ability to integrate features without affecting the perception of those same features. Lastly, we examined cases in which this integrative process occurs abnormally. In some people, certain letters and numbers elicit the perception of an illusory color that is spatially integrated with the inducing grapheme. This is called color-grapheme synesthesia. We found that magnetic stimulation of a specific brain, at the junction of the intraparietal sulcus and transverse occipital sulcus, attenuated the binding of the synesthetic color with inducing grapheme. Together, these studies suggest that normal binding and synesthetic binding rely on the parietal cortex.Subjects--Topical Terms:

1017680
Biology, Neuroscience.

Cognitive and neural influences on the perceptual integration of color and shape.
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035 $a (UMI)AAI3253850
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100 1 $a Esterman, Michael Scott. $3 1924109
245 1 0 $a Cognitive and neural influences on the perceptual integration of color and shape.
300 $a 99 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1302.
500 $a Adviser: Lynn Robertson.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2006.
520 $a We perceive the visual world as consisting of unified whole objects. However there is a wealth of evidence suggesting that veridical perception of the world requires both the processing of its individual features as well as the spatial integration of those features into bound objects. This dissertation focuses on situations in which this ability to integrate features is compromised, resulting in illusory combinations of features, known as illusory conjunctions. Semantic meaning, or categorical information, influences how these illusions can occur. Specifically, forms with similar meaning are more likely to have their colors misconjoined. Magnetic brain stimulation was used to examine how specific regions of the parietal cortex are critical for feature integration. Stimulation of a specific region of the brain, the right intraparietal sulcus, affected the ability to integrate features without affecting the perception of those same features. Lastly, we examined cases in which this integrative process occurs abnormally. In some people, certain letters and numbers elicit the perception of an illusory color that is spatially integrated with the inducing grapheme. This is called color-grapheme synesthesia. We found that magnetic stimulation of a specific brain, at the junction of the intraparietal sulcus and transverse occipital sulcus, attenuated the binding of the synesthetic color with inducing grapheme. Together, these studies suggest that normal binding and synesthetic binding rely on the parietal cortex.
590 $a School code: 0028.
650 4 $a Biology, Neuroscience. $3 1017680
650 4 $a Psychology, Psychobiology. $3 1017821
650 4 $a Psychology, Clinical. $3 524864
690 $a 0317
690 $a 0349
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710 2 0 $a University of California, Berkeley. $3 687832
773 0 $t Dissertation Abstracts International $g 68-02B.
790 1 0 $a Robertson, Lynn, $e advisor
790 $a 0028
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3253850