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• W2104772401 startingPage "1124" @default.
• W2104772401 abstract "We report fMRI evidence for two attentional processes in parietal cortex. Subjects matched a feature, cued by a word, to a test display of moving colored dots. Either color (red, green) or motion direction (left, right) was cued on mixed scans while only one dimension was cued on blocked scans. An event-related paradigm separated the preparatory activity generated by the cue from the subsequent activity related to the test display. One attentional process specified task information while a second process was motion selective. During the cue period, a pure effect of task specification was observed in left frontal cortex while combined effects of task specification and motion selectivity were observed in left posterior parietal cortex. The frontal task-specification signal may have been the source of the corresponding signal in parietal cortex. Effects of task specification generalized over cue dimension, indicating that the information was coded in a sufficiently abstract form to affect color and motion processing. During the subsequent test period, task-specification and motion-selective signals were again observed in left parietal cortex. Task specification did not significantly affect occipital motion-selective regions, such as MT+, however, indicating that this process did not influence the lower cortical tier of the motion processing stream. These results provide evidence for general and specialized task representations within left parietal cortex during task preparation and execution." @default.
• W2104772401 created "2016-06-24" @default.
• W2104772401 creator A5036976089 @default.
• W2104772401 date "2002-11-01" @default.
• W2104772401 modified "2023-10-14" @default.
• W2104772401 title "Two Attentional Processes in the Parietal Lobe" @default.
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• W2104772401 doi "https://doi.org/10.1093/cercor/12.11.1124" @default.
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