Page:Jung - The psychology of dementia praecox.djvu/30

6 is only possible because no other interesting conscious process occurs. Hence it must be assumed that there is a certain narrowing of consciousness. From this we can also understand the resemblance between the hypnotic and the catatonic states. The impulsive acts of catatonia are likewise explained by the narrowing of consciousness, thus preventing the intervention of any inhibition. Vogt is apparently under the influence of Pierre Janet, to whom the "narrowing of consciousness" and diminution of attention is the same as abaissement du niveau mental. Here then we again meet the already mentioned view, though in a somewhat more modern and generalized form, namely, that in catatonia there is a disturbance of attention, or as I prefer to express it in a more general term, there is a disturbance of positive psychic function. The reference to the similarity of hypnotic conditions is very interesting, but unfortunately Vogt gave us only a mere outline.

Kindred views are advanced by Evensen. He draws a skilful parallel between catatonia and absent-mindedness. Lack of ideas in a narrowed consciousness is the foundation of catalepsy, etc.

A painstaking and detailed examination of the psychology of catatonia is the thesis of René Masselon. The author first affirms that diminution of attention (distraction perpétuelle) is the main characteristic. He conceives attention in a very general and comprehensive sense corresponding to his French training in psychology. He says, "The perception of external objects, the perception of our own personality, judgment, the ideas of