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Cognitive impairment in schizophrenia: a life span perspective
1Department oF Psychology, Indiana University, Bloomington, IN 47405, USA. bodonnel@indiana.edu
American Journal of Alzheimer'S Disease and Other Dementias
|October 26, 2007
Summary
Schizophrenia
Area of Science:
- Neuroscience
- Psychiatry
- Cognitive Science
Background:
- Cognitive impairment is a central feature of schizophrenia.
- Understanding cognitive changes across the lifespan is crucial for classifying schizophrenia's nature.
Purpose of the Study:
- To investigate the developmental trajectory of cognitive impairment in schizophrenia.
- To determine if schizophrenia is primarily a neurodevelopmental or neurodegenerative disorder based on cognitive evolution.
Main Methods:
- Longitudinal analysis of cognitive function in individuals at risk for and diagnosed with schizophrenia.
- Review of existing literature on cognitive deficits from childhood through old age.
Main Results:
- Children who develop schizophrenia exhibit premorbid cognitive deficits (e.g., language, academic performance).
- Cognitive impairment is pervasive at first episode but does not significantly worsen through middle age.
- A subset of chronic, institutionalized patients may experience further decline in old age.
Conclusions:
- Schizophrenia is best conceptualized as a neurodevelopmental disorder with prenatal origins.
- Early-life factors contribute to premorbid cognitive deficits and later neural disturbances in schizophrenia.
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