Emotion und Hemisphärendominanz
Abstract
Zusammenfassung: Es werden empirische Studien zum Thema der Hemisphärendominanz für emotionale Prozesse im Überblick referiert. Die Befunde werden im Hinblick auf drei Hypothesen erörtert: 1. Allgemeine Dominanz der rechten Hemisphäre für Emotionen, 2. Differentielle Dominanz der rechten bzw. linken Hemisphäre für Emotionen mit negativer bzw. positiver Valenz, 3. Valenzabhängige differentielle Dominanz der Frontalhirnregionen für das Entstehen und Erleben von Emotionen, bei gleichzeitig valenzunabhängiger Dominanz posteriorer Regionen der rechten Hemisphäre für die perzeptuelle Emotionsverarbeitung. Die Synopsis der Ergebnisse stützt die erstgenannte Hypothese, wobei sich die Dominanz der rechten Hemisphäre vorwiegend bei negativen Emotionen manifestiert und möglicherweise speziell die Arousal-Komponente der Emotionen betrifft.
Empirical studies on the hemispheric dominance for the processing of emotions are reviewed and discussed with respect to three hypotheses postulating, first, an overall dominance of the right hemisphere for emotional processing in general, second, a differential dominance of the right and left hemisphere for emotions of negative and positive valence, respectively, and, third, a valence-dependent hemispheric dominance that is restricted (a) to the frontal regions of the hemispheres and (b) to the processes of emotional experience and expression, in conjunction with a general dominance of posterior regions of the right hemisphere for the perceptual processing of emotional impressions. It is concluded that the findings give most support for the first hypothesis, and that the right hemisphere dominance relates particulary to negative emotions and possibly to the arousal component of emotions.
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