Historical Background:

“Schizophrenia” was first identified as a discrete mental illness by Dr. Emile Kraepelin in the 1887 AD  and differentiated psychiatric illness into 2 major groups.

Dementia Precox
Mani depressive illness( psychosis)

Eugen Bleuer’s Fundamental Symptoms of Schizophrenia: 4 A’s
The Swiss psychiatrist, Eugen Bleuler, coined the term, “schizophrenia” in 1911. He first  described the symptoms as “positive” or “negative.”. Bleuler changed the name …

According to the revised fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR), to be diagnosed with schizophrenia, three diagnostic criteria must be met:
Characteristic symptoms: Two or more of the following, each present for much of the time during a one-month period (or less, if symptoms remitted with treatment).

Delusions
Hallucinations
Disorganized speech, which is a manifestation of formal …