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Catatonic Signs in Medical and Psychiatric Catatonias

Abstract Patients with psychiatric catatonias vs those with medical catatonias may differ in catatonic phenomenology. To determine if these could be distinguished, the following methods were used: 1) a review of the literature; 2) a chart review; and 3) a prospective series. The literature review of 467 report of medical catatonias yielded 240 cases that met research criteria. A chart review of 47 episodes of catatonia revealed a higher frequency of negativism in patients with medical catatonias. Prospective data obtained from rating scales revealed an increased frequency of echophenomena in patients with medical catatonias; however, no discriminate pattern of catatonic signs for medical catatonias arose. Overall, catatonic signs appear to share a similar distribution. These findings suggest that psychiatric and medical catatonias are indistinguishable based upon catatonic signs.