Publication Date:
1995-11-03
Description:
Positron emission tomography was used to measure changes in the regional cerebral blood flow of normal people while they searched visual displays for targets defined by color, by motion, or by a conjunction of color and motion. A region in the superior parietal cortex was activated only during the conjunction task, at a location that had previously been shown to be engaged by successive shifts of spatial attention. Correspondingly, the time needed to detect a conjunction target increased with the number of items in the display, which is consistent with the use of a mechanism that successively analyzes each item in the visual field.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corbetta, M -- Shulman, G L -- Miezin, F M -- Petersen, S E -- EY08775/EY/NEI NIH HHS/ -- NS06833/NS/NINDS NIH HHS/ -- NS2533/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1995 Nov 3;270(5237):802-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology and Neurological Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7481770" target="_blank"〉PubMed〈/a〉
Keywords:
*Attention
;
Cerebrovascular Circulation
;
Color Perception
;
Humans
;
Motion Perception
;
Parietal Lobe/blood supply/*physiology/radionuclide imaging
;
*Pattern Recognition, Visual
;
Tomography, Emission-Computed
;
*Visual Perception
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
