Search

Reactive psychosis (RP) is a trauma-induced category whose meaning has varied in relation to the role attributed to lived experiences or vulnerable personality. It has long been described in different countries, but seldom investigated under the influence of symptom-based psychiatric classifications. This article aims to examine the development of RP since the early 20th century, outline how it has been incorporated in modern diagnostic classifications, and set out empirical findings. It is likely that variations in terminology and diagnostic practice have affected estimates of the frequency and hampered the validity of RP in earlier studies. To enhance reliability, RP underwent several changes in successive Diagnostic and Statistical Manual of Mental Disorders and ICD versions and was eventually replaced with descriptive categories for short-lived psychotic disorders. Clinical observations during the COVID-19 pandemic attest the durability of RP, but the current categories prove unhelpful in identifying it and have failed to encourage research. [ABSTRACT FROM AUTHOR]

This paper deals with the history and epistemology of acute polymorphic psychosis. We undertook a comparative study of short-lived psychotic disorders used in different European countries since the late nineteenth century. The theory of degeneration offered a speculative basis to conceptualization of conditions such as bouffée délirante, cycloid psychosis and reactive psychosis, but it seems likely that different factors contributed to the profusion of clinical concepts with adverse effects on both nomenclature and classification. The resulting picture suggests that earlier nosological concepts tend to converge on common descriptive features and challenge the diagnostic categories for short-lived psychotic disorders listed in modern symptom-based psychiatric classifications. [ABSTRACT FROM AUTHOR]

Short-lived psychotic disorders as currently listed under "acute and transient psychotic disorder," ICD-11 Classification of Mental, Behavioural, and Neurodevelopmental Disorders, and "brief psychotic disorder," Diagnostic and Statistical Manual of Mental Disorders (DSM-5), constitute a point of divergence in the classification of psychotic disorders between the 2 diagnostic systems, which reveals the lack of knowledge about these conditions. Whether this is due to conceptual shortcomings inherent to the categories themselves and which spill over onto research or reflects a mismatch between the diagnostic criteria used and research techniques needs clarification. This study aimed to examine conceptual issues involved in the development of the above categories and shows that little continuity exists between earlier nosological concepts such as bouffée délirante, cycloid psychosis, and reactive psychosis and modern descriptive categories used to classify short-lived psychotic disorders. It seems likely that shortcomings in terms of symptom completeness, specificity, and heterogeneity, in addition to changes in definition and diagnostic criteria in successive DSM and ICD versions, have hampered empirical research, making it difficult to enhance the understanding of these conditions and achieve a closer concordance between the 2 classificatory systems. [ABSTRACT FROM AUTHOR]