Dose Reduction/Discontinuation of Antipsychotic Drugs in Psychosis; Effect on Cognition and Functional Outcomes

What is the cause of the psychological symptoms of schizophrenia ?
The cognitive changes that has been occurred in personal knowledge concepts after the first onset of sz ,and going without stop during the life time of schizophrenia

The changes in the thoughts concept will change all types of personal behavior outputs
What kind of medication means to modifying the modified thoughts concept which has been occurred from the onset to now , and the way to stopping the current changing process which occur now /or may occur in future (the past, present and future)
modify the thoughts by medication -HOW ?