What was the patient's intention in her longer walks under the moon's influence, that she, for instance, climbed to the first story, reflected for a moment and then started to go out at the gate? That becomes comprehensible when it is remembered that she once opened the door in her sleep for her lover in the country and furthermore in her first complicated sleep walking. The purpose of the latter has been stated, to climb into her mother's bed in order to obtain the greatest sexual pleasure. I do not believe I am far astray when I assume that this erotic desire of the child lies also essentially at the basis of her more extensive wandering in the moonlight. She simply wishes each time to go to the bed of some beloved one, which, as we shall hear later, is accepted by poets and the folk mind as a chief motive, and a fundamental one for many instances of sleep walking, especially with maidens.
It becomes clear now, likewise, why the patient climbs into the first story, then recollects herself and seeks to go out at the gate. In her seventh year she and her family had changed their abode and this had been before in the first story but was now on an upper floor. She is trying yet to climb into the mother's bed, this still remaining as a fundamental motive. Only she is not seeking the bed where it stands at the present time but where it stood in childhood, in the first story and in another house. She goes, therefore, downstairs but remembers, unconsciously of course, that this is not the right floor and wants now to go out at the gate to find the home of her childhood. Later in the country when she so thoroughly frightens her landlady and her daughter, there she is also going to a woman she loves and she leaves the house for this purpose and goes at least into the room that lies in the direction of the house where the beloved lies. Later still she opens the door wide in her sleep so that her lover can have free entrance.
We might also explain now in great part the sleep walking of the mother. As far as I can discover, the mother also as a very small child lived in another home than the one in which her sleep walking began. She ran about her room at night and could not find her bed and felt around in distress without coming upon the chamber, both of which stood in the usual places. This may be explained by the fact that in phantasy she was seeking the bed and chamber of her earliest childhood, which of course stood elsewhere. Moreover she attained by her moaning the fulfilment of her unconscious wish to be set by her mother upon the chamber and then lifted into bed. The wanderings in the moonlight, after which likewise she could not find her way back to bed, may be similarly explained, though I learned only this much about her dancing in the moonlight, that in her childhood she was very fond of dancing, which is also the case with our patient. Perhaps she wished also to play elves in the moonlight, according to poems or fairy tales or had, like her daughter, earned the special love of her parents through her skill in dancing.
We are now at the chief problem. How is it then that the night's rest, the guarding of which is always the goal of the dream, is motorially broken through in sleep walking? There is first a special organic disposition, which is absent from no sleep walker, a heightened motor stimulability[11]. This appears clearly with children, and so for example with our patient as a tendency to convulsive attacks, pavor nocturnus and terrifying dreams, from which she starts up.
As far as my observations go, it seems to me that there is a special disposition to sleep walking in the descendants of alcoholics and epileptics, of individuals with a distinctively sadistic character, finally of hysterics, whose motor activity is strongly affected, who also suffer with convulsions, tremor, paralyses or contractures. It should be merely briefly mentioned that the heightened motor excitability also establishes a disposition to a special muscle erotic, which in fact was easily demonstrable in every one of the cases of sleep walking and moon walking which have become known to me. The disturbance of the night's rest was made desirable through the satisfaction of the muscle erotic to every one for whom the excessive muscular activity offered an entirely specialized pleasure, even sexual enjoyment.
Moreover in our case a series of features besides those already mentioned bear undoubted testimony to the abnormally increased muscle erotic. I have already elsewhere discussed them in detail[12] and will here merely name briefly the chief factors. The patient had an epileptic alcoholic grandfather on the mother's side, who was notorious when under the influence of alcohol for his cruelty and pleasure in whipping. She had, besides a strongly sadistic mother, two older brothers, of whom the elder was frightfully violent and brutal, often choking his brothers and sisters, while the other found an actually diabolical pleasure in destroying and demolishing everything. Our patient exhibited already at two years old as well as through her whole life a pleasure in striking blows, and also conversely a special pleasure in receiving them, further at four years old an intensive delight in dancing, an enjoyment that was unmistakably sexual. We have learned above how she delighted to press herself upon her mother's body or twine herself about her legs. Moreover, finally, one of her very earliest hysterical symptoms was a paralysis of the arm.
More difficult seems to me the answer to the second main question: What influence does the moon exercise upon the sleeper? It was earlier discussed, along with the various psychical overdeterminations, that the moonlight awoke first the infantile pleasure memories, among other things that that light shining everywhere lighted the way which led to the house and the dwelling of the earliest childhood. Mention was made of the infantile comparison of the moon's disk with the childish nates and perhaps the gazing upon the nightly orb, which seems besides most like a hypnotic fixation, may be also referred back to the same. Since we know today that the love transference constitutes the essential character of hypnotism, that symptom brings us once more to the eroticism. Beside there was not wanting with our patient a grossly sensual relationship. Finally there is also the infantile desire to climb over the houses into the moon, realizing itself in part at least in the moon-inspired climbing upon the roof.
Yet the second leading problem appears to me, in spite of all this, not completely exhausted. It might not thus be absolutely ruled out that more than a mere superstition lurks behind the folk belief which conceives of a “magnetic” influence by which the moon attracts the sleeper. Such a relationship is indeed conceivable when we consider the motor overexcitability of all sleep walkers and the effecting of ebb and flow through the influence of the moon. Furthermore no one, in an epoch which brings fresh knowledge each year of known and unknown rays, can deny without question any influence to the rays of moonlight. Perhaps in time the physicist and the astronomer will clear up the matter for us. Meanwhile the question is raised and can be answered only with an hypothesis.
In conclusion I have in mind a last final connection which the spell of the moon bears to belief in spirits and ghosts. It is established through many analyses that the visits of the mother by night form the basis of the latter, when she comes with the light in her hand and scantily clothed in white garments, nightgown, or chemise and petticoat, to see if the children are asleep or, if they are, to set a child upon the chamber. The so often mentioned “woman in white” may also be the maiden in her nightgown, who thus exhibits herself in her night garment to her parents as she climbs into their bed, later also eventually to her lover. The choice of the hour between twelve and one, which came to be called the ghostly hour, may perhaps be referred to the fact that at this time sleep was most profound and therefore there was least danger of discovery.
Case 2. I introduce here a second case, in which to be sure the influence of the moon represented only an episode and therefore received also but a brief analysis. It is that of a twenty-eight year old forester, who came under psychoanalytic treatment on account of severe hysterical cardiac distress. The cause of this was a damming up of his feelings toward his mother, for whom he longed in the unconscious. His condition of anxiety broke out when he went to live with his mother after the death of his father and slept in the next room. He admitted that his father drank. Every Sunday he was somewhat drunk. Likewise the mother, who kept a public house, was in no way disinclined toward alcohol. He himself had consumed more beer especially in his high school days than was good for him. I would emphasize in his sexual life, as belonging to our theme, his strong urethral erotic, which made him a bed wetter in childhood, led in later years to frequent micturition at night and caused a serious dysuria psychica. His muscle erotic finally drove him to the calling of a forester.