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- W2022152471 endingPage "328" @default.
- W2022152471 startingPage "312" @default.
- W2022152471 abstract "Behavioral deficits suffered by patients with schizophrenia in a wide array of cognitive domains can be conceptualized as failures of cognitive control, due to an impaired ability to internally represent, maintain, and update context information. A theory is described that postulates a single neurobiological mechanism for these disturbances, involving dysfunctional interactions between the dopamine neurotransmitter system and the prefrontal cortex. Specifically, it is hypothesized that in schizophrenia, there is increased noise in the activity of the dopamine system, leading to abnormal gating of information into prefrontal cortex. The theory is implemented as an explicit connectionist computational model that incorporates the roles of both dopamine and prefrontal cortex in cognitive control. A simulation is presented of behavioral performance in a version of the Continuous Performance Test specifically adapted to measure critical aspects of cognitive control function. Schizophrenia patients exhibit clear behavioral deficits on this task that reflect impairments in both the maintenance and updating of context information. The simulation results suggest that the model can successfully account for these impairments in terms of abnormal dopamine activity. This theory provides a potential point of contact between research on the neurobiological and psychological aspects of schizophrenia, by illustrating how a particular physiological disturbance might lead to precise and quantifiable consequences for behavior." @default.
- W2022152471 created "2016-06-24" @default.
- W2022152471 creator A5032374884 @default.
- W2022152471 creator A5033965347 @default.
- W2022152471 creator A5088141761 @default.
- W2022152471 date "1999-08-01" @default.
- W2022152471 modified "2023-10-15" @default.
- W2022152471 title "Cognition and control in schizophrenia: a computational model of dopamine and prefrontal function" @default.
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