Journal
NEUROPSYCHOLOGY
Volume 17, Issue 1, Pages 93-99Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0894-4105.17.1.93
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Simultaneous measurement of blood flow velocity (BFV) in the middle cerebral arteries was achieved by transcranial Doppler ultrasonography in 36 right-handed volunteers who were instructed to identify the emotion conveyed by prosody or semantics of a number of sentences. The tasks were performed under 2 levels of interference: neutral versus discordant affective value of the modality that had to be ignored. A multivariate analysis of variance showed a significant bilateral increase in BFV during the discordant conditions reflecting increased attentional demand. A significant left-hemispheric lateralization of BFV was observed as emotional semantics were labeled. When attention was shifted to affective prosody, the lateralization effect disappeared as a result of a marked increase in right-hemispheric BFV.
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