The multiplicity of etiological moments in other cases is not accidental, one of them has brought the other into activity. Thus a woman, with whom her husband practices coitus reservatus without regard to her gratification, finds herself forced to finish the tormenting excitement following such an act with masturbation, as a result of which she shows an anxiety neurosis with symptoms of neurasthenia. Under the same noxiousness another woman has to contend with lewd pictures against which she wishes to defend herself, and in this way the coitus interruptus will cause her to acquire obsessions along with the anxiety neurosis. Finally a third woman, as a result of coitus interruptus loses her affection for her husband and forms another which she secretly guards, and as a result she evinces a mixture of hysteria and anxiety neurosis. In a third category of mixed neuroses the connection of the symptoms is of a still more intimate nature, as the same etiological determinants regularly and simultaneously evoke both neuroses. Thus, for example, the sudden sexual explanation which we have found in virginal fear always produces hysteria, too; most causes of intentional abstinence connect themselves in the beginning with actual obsessions; and it seems to me that the coitus interruptus of men can never provoke a pure anxiety neurosis, but always a mixture of the same with neurasthenia, etc. It follows from this discussion that the etiological determinants of the occurrence must moreover be distinguished from the specific etiological moments of neurasthenia. The first moments, as for example the coitus interruptus, masturbation, and abstinence, are still ambiguous, and can each produce different neuroses; and it is only the etiological moments abstracted from them, like the inadequate unburdening, psychic insufficiency, and defense with substitution, that have an unambiguous and specific relation to the etiology of the individual great neuroses. In its intrinsic property, anxiety neurosis shows the most interesting agreements and differences when compared with the other great neuroses, particularly when compared with neurasthenia and hysteria. With neurasthenia it shares one main character, namely, that the source of excitement, the cause of the disturbance, lies in the somatic rather than in the psychic sphere as in the case of hysteria and compulsion neurosis. For the rest we can recognize a kind of contrast between the symptoms of neurasthenia and anxiety neurosis, which can be expressed in the catchwords, accumulation and impoverishment of excitement. This contrast does not hinder the two neuroses from combining with each other, but shows itself in the fact that the most extreme forms in both cases are also the purest.