Hidden Treasure, Page 111
Schizophrenia (dementia praecox) is the most prevalent of mental disorders. About one percent of the population eventually develop it.
It is essentially a chronic disease of unknown origin, characterized by marked personality disintegration.
In general appearance schizophrenics resemble normal individuals. All body types are represented. Distinction lies in their mental content and behavior.
Schizophrenics are divided into four clinical groups: simple, paranoid, catatonic and hebephrenic.
Delusions and hallucinations occur in most hebephrenic, catatonic and paranoid patients. The latter often give evidence of these symptoms by conversing or arguing with imaginary individuals.