Myocardial infarctions, injuries, infections, metabolic disorders, and the like are also disease processes that rob patients of their freedom. In the medical model, psychiatric illnesses such as schizophrenia, depression, obsessive-compulsive disorder, bipolar disorder, panic disorder, and alcohol or other substance use disorders are regarded similarly, except that in psychotic illnesses, and other illnesses, the disease process can subvert a patient's thinking process so that the disease-driven symptoms may be rationalized and not seen as ego-alien. The patient's self has been completely taken over by the disease.