"As the third group of dementia praecox I should like to group together, under the designation of simple depressive or stuporous dementia, those cases in which, after an initial depression, with or without the appearance of stupor, a terminal mental deterioration gradually develops."
"Those cases which progress to the marked development of phantastic delusions we group together in the fourth form of dementia praecox—depressive delusional dementia."
"The next large group includes those cases in which severe and protracted excitements develop."
"The first sub group which on account of its course we may designate as the circular form shows the nearest relationship to the disease picture just described in that it also begins with a depression and usually manifests active delusions."
"As a second sub group, the agitated form, we bring together those cases in which the disease begins with an excitement and then immediately or after more or less frequent remissions and relapse passes into the terminal stage."
"In close relation to the cases brought together here we have to consider a small group which either in the initial stages of the disease or throughout its entire duration follows an outspoken periodic course; these amount to less than 2 per cent of all cases."
"The excitements of dementia praecox constitute an important part of the clinical form—Katatonia—which we must now consider. Under this designation Kahlbaum described a disease picture which in turn presents the symptoms of melancholia, mania and stupor, the unfavorable cases being accompanied by confusion and deterioration and is furthermore characterized by the appearance of certain motor seizures and inhibitions—in other words, the catatonic disorders."
"In many respects a dissimilar picture is shown by those cases in which the essential symptoms are delusions and hallucinations; these we characterize as paranoid forms. The justification for including them with dementia praecox I get from the fact that in them sooner or later the delusion formation is invariably associated with a series of disturbances which we find everywhere in the other forms of dementia praecox."
Cases "which do begin with a simple delusion formation but which in the further course exhibit still more clearly the peculiar destruction of the mental life and particularly the emotional and volitional disturbances which characterize dementia praecox may be grouped together under the name 'dementia paranoides gravis'."
"As a fourth form of paranoid dementia praecox, I believe still another group should be added, those which on the one hand show a similar development and the same delusion formation as the paranoid disorders just described but which on the other hand terminate in a characteristic mental enfeeblement." These he would call 'dementia paranoides mitis'."