Not necessarily the Dementia associated with age.
Any disorder that brings about extreme confusion and aberrant behaviour .The loss of mental powers such as memory ,orientation ,intelligence.
Dementia Praecox ,is now better known as Schizophrenia.
A psychosis marked by introversion, dissociation and inability to differentiate between reality and unreality .Often called split personality as the patient can be like two different people as they suffer delusions that they are unable to see are not real.
Tragic.
Viktoria.