MRI scans of schizophrenic patients have indicated that
A) schizophrenic subjects have higher levels of dopamine than nonschizophrenic subjects.
B) schizophrenic subjects have larger ventricles than nonschizophrenic subjects.
C) schizophrenic subjects have lower levels of catecholamines than nonschizophrenic subjects.
D) the amygdala of schizophrenic subjects is structurally defective relative to nonschizophrenic subjects.

Question

Quizplus · Accepted Answer

MRI scans of schizophrenic patients have consistently shown larger ventricles than in nonschizophrenic subjects. This is thought to be due to a loss of brain tissue in the frontal and temporal lobes, which leads to a decrease in brain volume overall and an increase in the size of the ventricles. Higher levels of dopamine are also associated with schizophrenia, but this is typically not assessed through MRI scans. Lower levels of catecholamines and structural defects in the amygdala are not consistently found in schizophrenia.

MRI Scans of Schizophrenic Patients Have Indicated That