He raves; his words are loose as heaps of sand, and scattered from sense. So high he’s mounted on his airy throne, that now the wind has got into his head, and turns his brain to frenzy.
— John Dryden
Schizophrenic disorders are severe disorders characterised by distorted thoughts and perceptions, odd communication, inappropriate emotion, abnormal motor behaviour and social withdrawal. Schizophrenia is not the same as multiple personality. Schizophrenia involves the split of the personality from reality, and not the coexistence of several personalities within one individual.
Disorganised schizophrenia is the state in which an individual has delusions and hallucinations that have little or no recognisable meaning – hence the label disorganised.
Catatonic schizophrenia is characterised by bizarre motor behaviour that sometimes takes the form of a completely immobile stupor.
Paranoid schizophrenia is characterised by delusions of reference, grandeur and persecution.
Undifferentiated schizophrenia is characterised by disorganised behaviour, hallucinations, delusions and incoherence and is the more generalised case.