T.J.Crow
Coined the term "Dementia Praecox"
Gave 11 First rank symptoms
Divided Schizophrenia into 2 subtypes , Type I & Type II
Gave 4 'A's of Schizophrenia.
Type I
Type II


Positive Symptoms
Negative Symptoms


CT and MRI normal
CT and MRI shows enlarged ventricles


Good Prognosis
Bad Prognosis