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Formal thought disorder is a hallmark feature of schizophrenia in which disorganized thoughts manifest as disordered speech. A dysfunctional semantic system and a disruption in executive functioning have been proposed as possible mechanisms for formal thought disorder and verbal fluency impairment. Traditional rating scales and neuropsychological test scores might not be sensitive enough to distinguish...
Objective: To assess changes in cognitive function in stable outpatients with schizophrenia switched to ziprasidone from conventional antipsychotics (n=108), olanzapine (n=104), or risperidone (n=58) because of suboptimal efficacy or poor tolerability. Methods: In three separate 6-week trials, patients received ziprasidone 40 mg b.i.d. for 2 days, followed by 20-80 mg b.i.d. for the next 40 days....
Previous studies have demonstrated that negative symptoms are regulated by frontal brain regions. We were interested in the relationship between psychiatric symptoms and performance on a verbal fluency (VF) battery in a population of elderly schizophrenic subjects. Thirty-five elderly schizophrenic subjects were administered a neuropsychological battery which included verbal fluency performance and...
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