What are some of the causes of mental disorders?
genetic influences on complex brain functions that control a person’s thoughts and emotions
physiological disruptions in hormones such as testosterone and vasopressin
intrauterine infections and malnutrition, maladaptive family functioning, or stress
-2/3 of mental retardation cases are traceable to environmental factors such as prenatal care, poor maternal nutrition, or maternal exposure to alcohol, tobacco or other drugs
Mental disorders can also occur from postnatal exposure to physical, chemical and biological agents (including secondhand cigarette smoke)