Evidence as regards the psycho-genesis rapidly accumulated. Schuster and many other observers refer to the disproportion between the trauma and its results on the nervous system. Severe neuroses arise from minimal shocks, while it is just the severe wounds accompanied by great shock that for the most part are not followed by nervous disturbances. Kurt Singer lays still greater stress on the disproportion between trauma and neurosis, and even endeavours to explain this fact psychologically: “In the kind of psychic trauma that comes on in a flash, in the terror, in the paralysing horror, we are concerned with cases of difficulty or impossibility of adaptation to the stimulus”. In a severe wound there is a discharge of the suddenly increased tension without anything further; when, however, no severe external injury exists the excessive affect is discharged “by means of a sudden abreaction through physical phenomena”. As the Freudian expression “abreaction” shows, psycho-analysis must have been in the mind of the writer when he thought out this theory. The expression sounds like a delayed response to the Breuer-Freudian conversion theory. However, it soon appears that Singer represents this process far too rationalistically; he looks upon the symptoms of the traumatic neuroses as the result of an effort on the part of the patient to find a comprehensible explanation of the (to him) inexplicable morbid process. Thus the work of this author is still far removed from the dynamic conception of the psychical processes of which psycho-analysis has taught us.

Hauptmann, Schmidt and others drew attention to the relation in time in the development of the symptoms in the war neuroses. If it is a question of a mechanical injury then the effect should be strongest immediately after the operation of the force. Instead of which one finds that the men thrown into a state of shock still make purposive endeavours to arrange for their safety the moment after the trauma, such as to get to the dressing station, etc., and only after having put themselves under safe conditions do they collapse and the symptoms develop. In some cases the symptoms appear only when the men have to return to the firing line after a period of rest. Schmidt is quite right when he refers this conduct of the patients to the psychical factors; he suggests that the neurotic symptoms develop only after the state of a transitory disturbance of consciousness has disappeared and the men who have suffered the shock re-experience in memory the dangerous situation. We would say: These injured men behave like the mother who rescues her child from a danger which threatens its life with calm imperturbability and disregard of death, but faints after the act has been accomplished. It is immaterial as regards the judgment of the psychological situation that here the person saved was not a beloved stranger, but the beloved person himself.

I place Nonne in the forefront of those authors who have laid particular stress on the psycho-genesis of the traumatic neuroses of the war. Not only because he recognised that the symptoms of the war shock neuroses were without exception hysterical, but because he was also able to cause the severest war neurotic symptoms to disappear for a time or to recall them by hypnotic and suggestive measures. This excluded the possibility even of a “molecular” disturbance in the nerve tissues; a disturbance that can be set right by means of psychic influences can itself have been nothing else than psychical.

This therapeutic argument had the greatest effect; by degrees a marked silence fell over the mechanistic school, and attempts were frequently made to explain their former utterances psycho-genetically. The quarrel from now onwards lay entirely between the supporters of the various psychological theories.

How is one to explain the method of working of psychical factors, and also the fact of the psychogenic condition being more severe than the impressive forms of disorders of organic origin?

One is reminded of the old theory of Charcot, that terror and the memory of it can produce in a similar manner physical symptoms after the nature of hypnosis and auto-hypnosis, just as they are intentionally brought about by the post-hypnotic command of the hypnotist.

This reverting to Charcot means nothing less than paving the way to fruitless speculations and the re-discovery of the sources from which finally psycho-analysis sprang; for we know that the first researches of Breuer and Freud into the psychical mechanisms of hysterical phenomena originated directly from the influence of Charcot’s clinical and experimental experiences. Hysterics suffer from reminiscences: this, the primary axiom of the germinating psycho-analysis, is really the continuation, deepening, and generalisation of the ideas of Charcot applied to the neuroses of shock; the idea of the lasting effect of a sudden affect and of the association of certain expressions of affect with the memory of the thing experienced is common to both.

Let us now compare with this the views of German neurologists on the genesis of the war neuroses. Goldscheider says: “Sudden and terrifying impressions can leave behind affects direct and also with the associative help of ideation; to these memory pictures are due the results of increased and lowered excitability. Thus it is the emotion, the terror, which bestows upon the trauma the distribution and fixation of the nervous results of the stimulus, which never occurs with the purely physical stimulus itself”. It is easy to recognise that this description is borrowed from the traumatic theory of Charcot and the Freudian conversion theory.

Gaupp’s opinion is similar: “In spite of all the methods of modern experimental psychology and of all the more precise and more delicate methods of technique for neurological and psychiatric investigation, there remains a residue, and not an insignificant one, in which we do not arrive at a diagnosis by means of the present exact neurological and psychiatric investigation of the condition at the moment present, but only through its connection with an exact anamnesis and with a laborious exploration of the pathogenesis of the existing condition”. Gaupp accepts even explicitly a Freudian postulation, in that he describes the war neuroses as a flight from psychic conflicts into illness and, alluding to psycho-analysis, he says: “Much preferable is the postulate of the effects of the unconscious on consciousness and the physical system than a psychological theory which seeks by words taken from the sciences of anatomy and physiology to gloss over the fact that the path from the physical to the mental and vice versa is entirely unknown to us”. In another place he goes still further and puts the psycho-analytical postulate of the unconscious in the centre of the whole problem. “If one only admits that mental processes can react upon the body even when they do not lie in the conscious field of vision, then most of the supposed difficulties disappear”. In this connection Hauptmann must also be mentioned. He looks upon the traumatic neuroses as mental illnesses psycho-genetically elaborated and caused through emotional factors, and their symptoms as “unconscious further elaboration of the emotional factors along paths of least resistance”.

Bonhoeffer seems to have completely accepted the psychologically complex experiences of psycho-analysis. He holds that the traumatic symptoms are “psycho-neurotic fixations, dissociation phenomena which have been rendered possible through the resultant splitting off of the affect from its ideational content under the influence of the violent emotion”.