MRI scans of schizophrenic patients have indicated that:
Correct answer: D. schizophrenic subjects have larger ventricles than nonschizophrenic subjects
- A. schizophrenic subjects have lower levels of catecholamines than nonschizophrenic subjects
- B. schizophrenic subjects have higher levels of dopamine than nonschizophrenic subjects
- C. schizophrenic subjects have higher levels of serotonin than nonschizphrenic subjects
- D. schizophrenic subjects have larger ventricles than nonschizophrenic subjects
Explanation
MRI studies have commonly found enlarged brain ventricles in some people with schizophrenia, suggesting reduced surrounding brain tissue. Dopamine differences concern neurotransmitter activity, not the direct structural finding shown by MRI.
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