Author studied the clinical features of hallucinations of 483 neuropsychiatric patients who had been hospitalized in the Dept, of Neuropsychiatry, St. Mary’s Hospital, Catholic Medical College,, during the period of Jan. 1976 to Dec. 1976. The results were as follows: 1. The neuropsychiatric disorders, in which any types of hallucinations were more frequently seen in organic brain syndromes (56.8%), schizophrenia (53.9%) f major affective disorders： (31.3%), other psychoses (involutional paranoid state, psychotic depressive reaction; 25.0%), neurosis (hysterical neurosis； 5.6%), personality disorders and certain other non-psychotic mental disorders (personality disorders, alcoholism drug dependence; 13. 6%). 2. Auditory hallucinations were most frequently seen in schizophrenia and major affective disorders, visual hallucinations in organic brain syndromes. 3. The frequent major themes of the hallucinations in the neuropsychiatric disorders. 1) Organic brain syndromes; every day affairs (57.1%) and persecution (52.4%) 2) Schizophrenia; persecution (51.0%), everyday affairs (16.7%) and instructions (16.7%) 3) Major affective disorders； persecution (60.0%) and predictions (50.0%) 4) Neurosis; persecution (37.5%) and every day affairs (37.5%) 5) Personatity disorders and certain other nonpsychotic mental disorders; every day affairs (50.0%) and persecution (33.3%) 4. The more frequent identities of source of hallucinations in the neuropsychiatric disorders. 1) Organic brain syndromes; strangers (38.1%) and animal-insects (33.3%) 2) Schizophrenia; strangers (44.8%) and other persons (17.7%) 3) Major affective disorders; strangers (80.0%) 4) Neurosis; strangers (62.5%) 5. The degree of percentage of correlation between the themes of hallucination and theconte- _iits of thought or delusional ideas of the patients is 33.3% in organic brain syndromes, 74.0% in：schizophrenia, 60.0% in major affective disorders, 75.0%in other psychosis, 25.0% in neurosis, 33.3% in personality disorders and certain other non-psychotic mental disorders. 6. The degree of percentage ofcorrelation between the incidence of hallucination and the patient’s emotional arousal (angry, sad, anxious) is 23.8% in organic brain syndromes, 53.1% in schizophrenia, 70.0% in major affective disorders, 75.0% in other psychoses, 75.0% in neurosis, 66.7% in personality disorders and certain other nonpsychotic mental disorders. 7. In the patient’s response to the hallucinations, negative adaptations were more frequently seen in organic brain syndromes (42. 9%)» schizophrenia (45.8%), major affective disorders (40.0%), other psychoses (50.0%), personality disorders and certain other non-psychotic mental disorders (33. 3%). Positive adaptations were more frequently seen in major affective disorders (40.0%) and neurosis (25.0%). No obvious adaptive responses were more frequently seen in the neurosis (50.0%), personality disorders and certain other non-psychotic mental disorders (33.3%). 8. The incidence of positive insight toward the hallucination is 81.0% in organic brain syndromes, 40.6% in schizophrenia, 70.0% in major affective disorders, 25.0% in other psychosis, 87.5% in neurosis, 83.3% in personality disorders and certain other non-psychotic mental disorders
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