In 1893 Emil Kraepelin borrowed the term from Schule and Pick and in 1899 introduced a broad new distinction in the classification of mental disorders between "dementia praecox" and mood disorder (termed manic depression and including both unipolar and bipolar depression).
Latiniziran izraz »dementia praecox« je prvi uporabil nemški alienist Heinrich Schule leta 1886, nato pa ga je 1891 uporabil Arnold Pick v poročilu o osebi s psihotično motnjo (hebefrenija).