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A spatial oculomotor memory-task performance produces a task-related slow shift in human electroencephalography

Recorded EEG deflections during 2 spatial oculomotor delayed response tasks in which 11 healthy Ss were instructed to make a saccade either to the right or the left, depending on the spatial location of the cue shown at the beginning of the delay period. EEG deflections were compared to those recorded during a control task in which Ss made a saccade to the right or left but with minimal attention paid to spatial information. A slow delay-related shift was recorded during both tasks; the shift was positive in the most frontal and negative in the most posterior recording sites. The negative slow shift in the more posterior recording sites was larger in the memory tasks than in the control tasks. Results suggest that the difference in magnitude of slow shifts between the memory and control tasks reflects neural activity related to spatial working memory. (PsycINFO Database Record (c) 2009 APA, all rights reserved)



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