Introduction Not Otherwise Specified (NOS) is a term used in the medical and psychological fields. It is used to describe a disorder or diagnosis that does not meet the criteria for a specific diagnosis, yet still deserves recognition due to its severity and clinical implications. NOS is a very common diagnosis and is seen in […]
Historical Context and Nomenclature: The Shift from Atypical Pervasive to PDD-NOS The conceptualization and categorization of developmental disorders characterized by severe and pervasive impairments in multiple areas of functioning have undergone significant revisions within the various editions of the Diagnostic and Statistical Manual of Mental Disorders. Historically, the term Atypical Pervasive Developmental Disorder was employed, […]
Introduction and Definition of Atypical Psychosis The term Atypical Psychosis refers historically to a diagnostic category used primarily within the classification system of the third edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-III). This designation served as a crucial placeholder for clinical presentations that clearly involved a disruption in reality testing—manifesting through […]