ISSN : 1226-9654
The purpose of this study was to investigate the physiological reactions and subjective experiences of schizophrenic patients against negative emotional stimuli such as anger, disgust, fear, and sadness. The responses to the emotional stimuli of each subjects were assessed by measuring and analysing the physiological signals before and during presenting negative emotional movie scenes; the parameters were the heart rate (HR), respiration(RESP), skin conductance level (SCL), skin conductance response (SCR), corrugator muscle (CM), and orbicularis muscle (OM), respectively. Patients reported that they have experienced strong emotions in responses to the stimuli of disgust, fear and sadness. The identification rate of anger only was distinguishable between the patients and the controls. The changes in the physiological responses of the patients between the resting periods and emotion-induced state in anger (HR, CM), fear (SCR, RESP, CM), sadness (HR, RESP) were less significant compared to the changes in the control group. The control subjects exhibited significantly-increased values in eleven parameters; anger (HR, RESP, CM), disgust(OM), fear(SCR, SCL, RESP, CM, OM), and sadness(HR, RESP), while the patients showed significant changes only in three parameters; disgust (HR), fear (SCR), and sadness (RESP). This study show that the physiological responses in patients apparently differ from in controls while the subjective experience cannot tell the difference between the two groups.
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