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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.
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Kenneth M. Heilman
Thomas Van Den Abell
Neurology
University of Florida
United States Department of Veterans Affairs
Florida College
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Heilman et al. (Sat,) studied this question.
www.synapsesocial.com/papers/6a11c00be2cb0ccec0c901ad — DOI: https://doi.org/10.1212/wnl.30.3.327