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Department of Neurology, College of Medicine. University of Florida, and Veterans Administration Medical Center, Gainesville, FL.
Because hemiinattention is most commonly caused by right parietal lesions, it is possible that the left hemisphere attends to contralateral stimuli whereas the right attends to both contralateral and ipsilateral stimuli. We gave lateralized visual stimuli to 12 normal subjects and recorded the electroencephalograms. Desynchronization was determined by comparing the alpha power 1 second before and 1 second after a lateralized visual stimulus. Although the left parietal lobe desynchronized most after right-sided stimuli, the right parietal lobe desynchronized equally after right or left stimuli. These findings support the hypothesis that the right hemisphere is dominant for attention.
Address correspondence and reprint requests to Dr. Heilman, Department of Neurology, Box J-236. College of Medicine, University of Florida, Gainesville, FL 32602.
Accepted for publication August 10, 1979.
Presented in part at the thirty-first annual meeting of the American Academy of Neurology, Chicago. April 1979.
This research was supported by NIH grant No. NS 12218.
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