Abstract
In order to investigate the relationship between pleasant emotional experience and facial expression (i.e., laughter), mood before and after watching comic film clips, self-rated pleasant emotional experience for each film clip and electromyographic activities of facial muscles involved in laughter while watching film clips were measured for 25 patients with schizophrenia and 20 normal controls. Patients with schizophrenia who showed a significant correlation between self-rated emotional experience and major zygomatic activity were equivalent to normal controls in self-rated emotional experience and in mood after film clips; they had a significant increase in mood scores related with pleasure. Although these patients were thought to have sufficient pleasant emotional experience, they showed significantly low major zygomatic activity as compared to normal controls. It is suggested that these patients have a disturbance in the process of emotional expression rather than emotional experience.
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