Schizophrenia Hallucinations (IMAGE) University of Washington Caption Gene variants that affect brain signal receptors may be one of several causes of schizophrenia symptoms, which can include terrifying hallucinations. Credit Alice C. Gray Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.