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- W2080698239 abstract "Facial discrimination tasks were applied as activation probes during physiologic neuroimaging (neurobehavioral probes). The stimuli pictured professional actors and actresses, posing degrees of happy and sad emotion. Cortical cerebral blood flow (CBF) was determined using the 133Xenon inhalation method during resting baseline, two emotional (happy from neutral and sad from neutral faces) and one nonemotional discrimination task (age). The three tasks produced CBF increase over baseline, which was greater in the right hemisphere (Task x Hemisphere interaction, p = .0001). There were regionally specific effects (Task x Region x Hemisphere interaction, p = .022). Relative to the age discrimination task, both emotion discrimination tasks were associated with greater right parietal activation. In addition, the happy discrimination task induced greater left frontal activation relative to the sad discrimination task. While overall magnitude of CBF increase did not show regionally specific correlations with performance, laterality did show such specificity. Sad discrimination performance correlated with greater right parietal activation, while performance on the happy discrimination task correlated with left frontal activation. Age discrimination performance correlated with higher activated right temporal CBF. These results support the hypothesis of right hemispheric involvement in facial processing and further suggest regionally specific hemispheric participation in happy and sad emotional discrimination. The study underscores the utility of performance measures for understanding the behavioral significance of activation effects in physiologic neuroimaging studies." @default.
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- W2080698239 title "Effects of Emotional Discrimination Tasks on Cerebral Blood Flow: Regional Activation and Its Relation to Performance" @default.
- W2080698239 doi "https://doi.org/10.1006/brcg.1994.1036" @default.
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