<qa>  What is the symptom of schizophrenia?Clinical Relevance- The inability to experience pleasure and the inability to pursue goals is an important symptom of schizophrenia. These symptoms probably play a huge role in preventing many people with schizophrenia from leading full and fulfilling lives. A central defect in reward processing pathways in the brain may account for these symptoms. If aripiprazole can be demonstrated to improve functioning in these brain pathways, this would greatly advance our understanding of schizophrenia and could bring greater functioning to patients with schizophrenia. 