The term "schizophrenia" is not univocal in terms of diagnosis and therapy, and brings a variety of erroneous generalizations and myths. It was created by Eugen Bleuer, a Swiss psychiatrist, who combined two Greek words - schizis "split" and phren "the mind". It was then a psychosis which was to reveal by "mind split" and has nothing in common with the "split of personality", which is a non-psychotic symptom from the group of dissociative disorders.
On the other hand, the American Psychological Association defines schizophrenia as a "serious mental illness", which is not true, either, as it conveys information about irreversibility of changes, and we know already that patients with schizophrenia have periods of remission and that 15% of them may be mentally healthy till the end of their life after the first psychotic episode.
The reason for the occurrence of schizophrenia symptoms are abnormalities in brain functionality, what will be discussed in a more detail in the subsequent article.
ICD 10, the International Classification of Diseases, specifies the following types of schizophrenia:
F20.1 Paranoid schizophrenia
F20.2 Hebephrenic schizophrenia
F20.3 Catatonic schizophrenia
F20.4 Undifferentiated schizophrenia
F20.5 Post-schizophrenic depression
F20.6 Residual schizophrenia
F20.7 Simple schizophrenia
F20.8 Other schizophrenia
F20.9 Unspecified schizophrenia
The particular types of schizophrenia differ among one another with the intensity of symptoms and the course of diseases, however, this division does not significantly affect the way how the disease is diagnosed or treated, so, from the perspective of the patient or his/her caregiver, it has no major practical relevance. The American Psychiatric Society, in their recent DSM-V classification, departs from the identification of types, moving towards "area identification", what will be discussed in the chapter "The symptoms of schizophrenia".