Using brain-imaging techniques,Staal and colleagues (2000)found that both people with schizophrenia and their otherwise-unaffected siblings had enlargement of the third ventricle as compared with healthy volunteers.What does this finding suggest?

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The finding suggests that an enlarged third ventricle may be related to susceptibility to schizophrenia. Both people with schizophrenia and their unaffected siblings had enlarged ventricles, suggesting that this could be a risk factor for the development of schizophrenia. However, it is not clear whether the enlargement is a result of the disorder or a potential risk factor for it.

Using Brain-Imaging Techniques,Staal and Colleagues (2000)found That Both People with Schizophrenia