Schizophrenia
...ve symptoms, negative symptoms, and psychomotor symptoms. Positive symptoms include delusions, disorganized thinking and speech, heightened perceptions and hallucinations and inappropriate affect. Negative symptoms consist of flattened affect, social withdrawal, and avoliaton. Psychomotor symptoms consist of catatonia. There is no one known cause of schizophrenia. Some believe it’s a combination of environmental, biochemical, and genetic factors that contribute to the onset. Some theorist believe that schizophrenia is many disorders occurring at one time. Of the biological approaches genetics is the first to be looked at There have been numerous amounts of studies on the subject. One of the first began with E. Rudin in 1916. Gottesman looked at the results of 40 studies between 1920 and 1987 and was able to come up with the risk of developing schizophrenia for first, second, and third degree relations of schizophrenics. Identical twins have...