Schizophrenia and Other Psychotic Disorders
Patients with schizophrenia experience three categories of symptoms: positive (delusions and hallucinations); negative (blunting of affective expression, loss of volition, and apathy); and disorganized (as reflected by a formal thought disorder). A diagnosis of schizophrenia requires that continuous signs of illness, which may include prodromal and residual symptoms, be present for at least 6 months. Research indicates that schizophrenia is likely a neurodevelopmental illness with clear heritable risk factors. Patients with schizophrenia tend to have an illness onset by young adulthood and a generally debilitating and long-term course, but the degree of disability and functional impairment is widely variable. Other illnesses characterized by prominent psychotic symptoms include schizoaffective disorder and delusional disorder. Treatment for psychotic illnesses includes antipsychotic medication and recovery-oriented psychosocial interventions aimed at “psychiatric rehabilitation” wherein patients can learn or relearn skills necessary to live independently and work competitively.