Autism spectrum disorders are compared to Alzheimer's disease in terms of the major DSM-5 categories of mental disorders, and childhood disintegrative disorders are compared to pervasive developmental disorders.
A mental disorder is a condition that manifests as a clinically significant disturbance in a person's thinking, regulating emotions, or acting in a way that is inconsistent with the biological, and psychological processes that underlie mental functioning. Anxiety disorders, bipolar and associated disorders, feeding and eating disorders, depressive disorders, obsessive-compulsive and related disorders, and personality disorders are a few examples of categories in the DSM-5. The DSM-5 lists around 300 different mental illnesses. This manual is used by medical practitioners to recognize and classify mental disorders.
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