<P> Sigmund Freud initially concentrated on the biological causes of mental illness and its relationship to evident behavioral factors . His belief in biological factors lead to the concept that certain drugs, such as cocaine, had an antidepressant functionality . In the 1950s the first modern antipsychotic and antidepressant drugs were developed: chlorpromazine (Thorazine), which was one of the first widely used antipsychotic medications to be developed, and iproniazid, which was one of the first antidepressants developed . The research on some of these drugs helped to formulate the monoamine and catecholamine theories, which alluded to the fact that chemical imbalances provide the basis for mental health disorders . New research points to the concept of neuronal plasticity, specifically mentioning that mental health disorders may involve a neurophysiological problem that inhibits neuronal plasticity . </P> <P> This field expresses the importance of accurately identifying and diagnosing mental health disorders . If not accurately diagnosed, certain treatments could only worsen the previous condition . This can be difficult since there are numerous etiologies that could reveal symptoms of mental health disorders . Some important disorders to focus on are: seasonal affective disorder, clinical depression, bipolar disorder, schizophrenia, generalized anxiety disorder, and obsessive compulsive disorder . </P>

Which factor is a biological explanation of psychopathology