Evolution of schizophrenia
- The evolution of schizophrenia refers to the theory of natural selection working in favor of selecting traits that are characteristic of the disorder.
- Positive symptoms are features that are not present in healthy individuals but appear as a result of the disease process.
- These include visual and/or auditory hallucinations, delusions, paranoia, and major thought disorders.
- Negative symptoms refer to features that are normally present but are reduced or absent as a result of the disease process, including social withdrawal, apathy, anhedonia, alogia, and behavioral perseveration.
- Cognitive symptoms of schizophrenia involve disturbances in executive functions, working memory impairment, and inability to sustain attention.
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Contributors: Prab R. Tumpati, MD
