Cerebral processing of nonverbal affective stimuli: differential effects of cognitive and affective sets on hemispheric asymmetry |
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| Authors: | M B Meyers B D Smith |
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| Affiliation: | 1. Department of Interprofessional Health Sciences & Health Administration, School of Health and Medical Sciences, Seton Hall University, NJ, USA;2. Pre-clinical Sciences, New York College of Podiatric Medicine, New York, USA;3. Department of Art History Columbia University, and Italian Academy for Advanced Studies, Columbia University, New York, USA;4. Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy;1. Institute of Neurology, Huashan Hospital, Institutes of Brain Science and State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China;2. Department of Neurology, Jinshan Hospital, Fudan University, Shanghai, China;3. Department of Neurology, Institute of Brain Science, Medical School, Shanxi Datong University, Datong, China;4. “2011” Collaborative Innovation Center/Department of Encephalopathy and National Major Clinical Department of Ministry of Health, Third Hospital, Department of Neurology, Shanxi University of Traditional Chinese Medicine, Taiyuan, China |
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| Abstract: | The cerebral processing of emotion has been the subject of a number of recent studies, but results relating to hemispheric asymmetry have been quite mixed. The present study attempted to clarify and extend findings in this area by examining the differential effects of cognitive and affective sets on hemisphere asymmetry under conditions of nonverbal emotional stimulation. Electroencephalographic (EEG) data, recorded bilaterally, showed that differential hemispheric processing interacted with emotion (positive or negative), condition (cognitive or affective), and sex. In those emotion/condition combinations where hemispheric asymmetry was observed, there was greater activity in the left hemisphere than in the right. In addition, positive affect produced greater asymmetry than negative, and females showed greater activity in response to positive emotional stimuli than did males. Further, affective conditions yielded higher levels of activity than did cognitive. Finally, electrodermal activity showed lateralization effects as a differential function of cognitive and affective conditions. |
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