tonight we continue our study of the human brain examining one of its most devastating diseases, skets friendia. schizophrenia is a flex mental disor marked by disturbance of perception, cognition, emotions and mode of behaviours. its symptoms vary from delusions and hallucinations to disorganized thoughts or behavior. despite areas of intense study the origins and development skits februaryia remains a mess-- mystery. we cannot recognize it in physical features in the brain in the same way. for example we know plaques and tangles that show alzheimer. we also don't know exactly what causes it, though it's believed to be a combination of genetic and environmental factors. what is certain is that disease's devastating effects it is estimated that 1% of americans suffer from schizophrenia. it usually strikes in late adolescents or early adulthood without regard to class, race, gender or culture. everyone from the writer jack kerouac and brian wilson and john nash has fought the disease of schizophrenia, yet the lack of understanding about it has lead many to hide their diagnosis. more recently tho