catatonia as a disease process has never disappeared from the literature although it was often vigorously attacked. Only a few authors accepted the concept of catatonia as a ‘disease process,’ the majority of German psychiatrists rejected it
Bleuler situates catatonia’s contested nosological history, tracing Kahlbaum’s original formulation and the widespread German resistance to accepting it as a unitary disease process rather than a symptom cluster.
, Dementia Praecox or the Group of Schizophrenias, 1911thesis