[Eugen Bleuler's warning of "autistic undisciplined thinking in medicine" as a contribution to the scientific critique of medical research. A Zurich concept on "ratio et experientia" in medical thinking].

Bleuler, well known for introducing psychoanalysis into university psychiatry, is less known for his more important achievement: his introduction of results of brain research into scientific thinking, especially epistemology. His short tract on "autistic and undisciplined thinking" summarises these themes, culminating in his critical rejection of a science which denies the "natural unity" of the brain, and insists on the separation of emotions from thinking despite the evidence to the contrary gained from studying associations and their physical substrate.