Scitzophranic Psychosis - What's the Anatomical Reason?

With sleeping, right before you fall asleep and when you're dreaming, the default mon network part of the brain is most disabled. With psychosis and scitzophrenia, however, the depalt monevic, instead of being off, is actually over active. Imwas just going to ask a question about something i've been thinking about, i revolving scitz penion psychosis. Why do you think the scitzophenian psychosis specifically has such a different reaction in the brain?