With susceptible subjects relatively insignificant stimuli suffice to bring about the somnambulic state. Thus a sensitive lady had to have a splinter cut out of her finger. Without any kind of bodily change she suddenly saw herself sitting by the side of a brook in a beautiful meadow, plucking flowers. This condition lasted as long as the slight operation and then disappeared spontaneously.[88]

Loewenfeld[89] has noticed unintentional inducement of hysterical lethargy through hypnosis.

Our case has certain resemblances to hysterical lethargy[90] as described by Loewenfeld, viz. the shallow breathing, the diminution of the pulse, the corpse-like pallor of the face, and further the peculiar feeling of dying and the thoughts of death.[91]

The retention of one sense is not inconsistent with lethargy: thus in certain cases of trance the sense of hearing remains.[92]

In Bonamaison's[93] case not only was the sense of touch retained, but the senses of hearing and smell were quickened. The hallucinatory content and loud speaking is also met with in persons with hallucinations in lethargy.[94] Usually there prevails total amnesia for the lethargic interval. Loewenfeld's[95] case D. had, however, a fleeting recollection; in Bonamaison's case there was no amnesia. Lethargic patients do not prove susceptible to the usual waking stimuli, but Loewenfeld succeeded with his patient St. in turning the lethargy into hypnosis by means of mesmeric passes, thus combining it with the rest of consciousness during the attack.[96] Our patient showed herself absolutely insusceptible in the beginning of the lethargy, but later on she began to speak spontaneously, was incapable of giving any attention when her somnambulic ego was speaking, but could attend when it was one of her automatic personalities. In this last case it is probable that the hypnotic effect of the automatisms succeeded in achieving a partial transformation of the lethargy into hypnosis. When we consider that, according to Loewenfeld's view, the lethargic disposition must not be "too readily identified with the peculiar condition of the nervous apparatus in hysteria," then the idea of the family heredity of this disposition in our case becomes not a little probable. The disease is much complicated by these attacks.

So far we have seen that the patient's consciousness of her ego is identical in all the states. We have discussed two secondary complexes of consciousness and have followed them into the somnambulic attack, where they appear as the patient's vision when she had lost her motor activity during the attack. During the next attacks she was impervious to any external incidents, but on the other hand developed, within the twilight state, all the more intense activity, in the form of visions. It seems that many secondary series of ideas must have split off quite early from the primary unconscious personality, for already, after the first two séances, "spirits" appeared by the dozen. The names were inexhaustible in variety, but the differences between the personalities were soon exhausted and it became apparent that they could all be subsumed under two types, the serio-religious type and the gay-hilarious. So far it was really only a matter of two different unconscious personalities, which appeared under different names but had no essential differences. The older type, the grandfather, who had initiated the automatisms, also first began to make use of the twilight state. I am not able to remember any suggestion which might have given rise to the automatic speaking. According to the preceding view, the attack in such circumstances might be regarded as a partial auto-hypnosis. The ego-consciousness which remains and, as a result of its isolation from the external world, occupies itself entirely with its hallucinations, is what is left over of the waking consciousness. Thus the automatism has a wide field for its activity. The independence of the individual central spheres which we have proved at the beginning to be present in the patient, makes the automatic act of speaking appear intelligible. Just as the dreamer on occasion speaks in his sleep, so, too, a man in his waking hours may accompany intensive thought with an unconscious whisper.[97] The peculiar movements of the speech-musculature are to be noted. They have also been observed in other somnambulists.[98]

These clumsy attempts must be directly paralleled with the unintelligent and clumsy movements of the table or glass, and most probably correspond to the preliminary activity of the motor portion of the presentation; that is to say, a stimulus limited to the motor-centre which has not previously been subordinated to any higher system. Whether the like occurs in persons who talk in their dreams, I do not know. But it has been observed in hypnotised persons.[99]

Since the convenient medium of speech was used as the means of communication, the study of the subconscious personalities was considerably lightened. Their intellectual compass is a relatively mediocre one. Their knowledge is greater than that of the waking patient, including also a few occasional details, such as the birthdays of dead strangers and the like. The source of these is more or less obscure, since the patient does not know whence in the ordinary way she could have procured the knowledge of these facts. These are cases of so-called cryptomnesia, which are too unimportant to deserve more extended notice. The intelligence of the two subconscious persons is very slight; they produce banalities almost exclusively, but their relation to the conscious ego of the patient when in the somnambulic state is interesting. They are invariably aware of everything that takes place during ecstasy and occasionally they render an exact report from minute to minute.[100]

The subconscious persons only know the patient's phantastic changes of thought very superficially; they do not understand these and cannot answer a single question concerning the situation. Their stereotyped reference to Ivenes is: "Ask Ivenes." This observation reveals a dualism in the character of the subconscious personalities difficult to explain; for the grandfather, who gives information by automatic speech, also appears to Ivenes and, according to her account, teaches her about the objects in question. How is it that, when the grandfather speaks through the patient's mouth, he knows nothing of the very things which he himself teaches her in the ecstasies?