情動喚起刺激に対する心臓血管系反応と脳波の偏側性

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The present study investigated the cardiovascular responses and hemispheric asymmetry elicited during the viewing of video-taped stimuli selected to produce positive and negative emotions in the viewer. Neutral footage, designed not to provoke any emotional state, was also used. Fifteen participants viewed three successive 10-minute films; blood pressure (BP), electrocardiogram and electroencephalogram (EEC) were monitored throughout the viewing of the films. The participants completed questionnaire after each film presentation. The questionnaires concerned the emotions that were provoked by the films. To estimate hemispheric asymmetry in each region, the α-power ((μV^2) of the EEG were calculated, and the left and right values for each region were compared. Once the provoked emotions were identified by the questionnaires, the physical findings were analyzed; cardiovascular responses decreased during positive and increased during negative emotions. The EEG results showed hemisphere asymmetry in the right parietal regions during the viewing of films that induced negative emotions, suggesting that negative emotions are activated in the right hemisphere. Based on the cognitive aspects of the responses to the film stimuli, the different cardiovascular patterns during positive and negative emotions were explained by the stimulus intake-rejection hypothesis; i.e., the cardiovascular response increases during information intake and decreases during information rejection. Using a model in which different emotions produce different patterns of brain activity, depending on the relative activity of the right posterior and anterior regions, the right posterior region appears to be differentially involved in the arousal dimension, whereas the anterior regions are involved in the emotion valence dimension. In conclusion, the increased cardiovascular response that occurs during the experience of negative emotions reflects a high arousal state, possibly as a result of induced activation in the right parietal region.
早稲田大学の論文
2002-04-01

情動喚起刺激に対する心臓血管系反応と脳波の偏側性

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