‘Insanity’ and ‘Delusion’

1. The term ‘insanity’ no longer exists in recent international systems of psychiatric classification. There is, on the other hand, the concept of delusion, which can occur either (a) as a functional illusory disturbance (‘paranoia’), or (b) with diseases of the schizophrenic group, and further, (c) as an organic illusory disturbance occurring with illnesses of the brain (tumor, inflammation of the bra…