The psycho-historians: a psychiatrist's skepticism.
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Biomedical subjects
Publications and source records attributed to M Shepherd.
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The epidemiological method is indispensable to the clinical investigator, the practising clinician and the public health worker. In the field of mood disorders epidemiological inquiry has been hampered by the subjective nature of the phenomena under study, the problems of assessment and diagnosis, observer bias and the unrepresentative nature of small population samples. Nontheless, it is argued that the difficulties are similar to those encountered elsewhere in medicine and examples are given of epidemiological contributions to an understanding of depression.
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Evidence from a controlled, comparative trial indicates that oral pimozide is clinically at least as effective as depot injections of fluphenazine decanoate in the continuation therapy of a group of schizophrenic patients discharged from hospital. The administration of pimozide was associated with fewer unwanted effects. The implications of the findings are discussed.
A blind social assessment at home carried out twice during a year's follow-up of 41 patients on continuation therapy, 21 randomly allocated to pimozide tablets and 20 to fluphenazine decanoate injections. Patients on pimozide were significantly more favourably rated on aspects of sociability, use of leisure, warmth of personal relationships, household tasks and child-rearing. The mode of production of this result is discussed.
The hypothesis that schizophrenia is caused by the release of prostaglandin E into the hypothalamus and may sometimes be accompanied by an elevation of temperature was examined by a clinical trial of the prostaglandin E suppressant N-acetyl-p-amino-phenol (paracetamol, acetaminophen). Ten acute schizophrenic patients were included in a double-blind, crossover trial of paracetamol and a placebo, in which each treatment was given for a week. Regular 4-hourly temperatures were recorded in all these cases and in 5 non-schizophrenic patients for comparison. The findings provided no evidence that paracetamol mitigated the symptoms of schizophrenia. The temperatures of the schizophrenics were not elevated more than those of the controls, but the number of cases used was probably too small for this finding to be conclusive.
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Dopamine, glutamic acid decarboxylase (G.A.D.) and choline acetyltransferase (C.A.T.) were measured in four regions of post-mortem brains. 41 patients with the hospital diagnosis of schizophrenia (psychotic group) were compared with a control grout normal in the putamen. G.A.D. activity was significantly reduced in the psychotic group, by about 50% in the nucleus accumbens, amygdala and hippocampus, and by about 30% in the putamen. C.A.T. activity was significantly lower in nucleus accumbens from the psychotic group, but normal in other brain regions. From an assessment of case notes, "schizophrenia" was distinguished from "schizophrenia-like psychosis". The biochemical findings for these subgroups were essentially similar, although C.A.T. activity in nucleus accumbens and hippocampus from the schizophrenic group was significantly lower than in controls. It is of brain are associated with schizophrenia and schizophrenia-like psychoses, although whether such neurochemical abnormalities are related to the illness or are a consequence of prolonged treatment with neuroleptic drugs remains unclear.
On the basis of data derived from a long-term follow-up of 12 cases and a 2-year follow-up of the International Pilot Study of Schizophrenia it is suggested that some patients with remitting schizophrenic illnesses can subsequently present clear-cut affective disorders. The implications of these findings are discussed.
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The life and the ideas of a mentally aberrant figure in mid-seventeenth century England are presented in relation to the sociocultural background of the time and the available clinical information. The material illustrates the need to draw on both sources when applying psychiatric concepts to particular historical epochs.
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