Publication Date:
1990-06-22
Description:
Positron emission tomography (PET) was used to measure changes in regional cerebral blood flow of normal subjects, while they were discriminating different attributes (shape, color, and velocity) of the same set of visual stimuli. Psychophysical evidence indicated that the sensitivity for discriminating subtle stimulus changes was higher when subjects focused attention on one attribute than when they divided attention among several attributes. Correspondingly, attention enhanced the activity of different regions of extrastriate visual cortex that appear to be specialized for processing information related to the selected attribute.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corbetta, M -- Miezin, F M -- Dobmeyer, S -- Shulman, G L -- Petersen, S E -- HL 13851/HL/NHLBI NIH HHS/ -- NS 06833/NS/NINDS NIH HHS/ -- NS 25233/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1990 Jun 22;248(4962):1556-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology and Neurological Surgery, Washington University School of Medicine, St. Louis, MO 63110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2360050" target="_blank"〉PubMed〈/a〉
Keywords:
Adult
;
Arousal
;
Attention/*physiology
;
Cerebrovascular Circulation/physiology
;
Color
;
Discrimination (Psychology)/*physiology
;
Humans
;
Tomography, Emission-Computed
;
Visual Cortex/*physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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