After having attracted the sensational attention so common with any novel observation and having been exaggerated out of all proportion to its due significance, the phenomenon is now settling down to its proper place—a rather obscure neurotic phenomenon of memory in hysteric individuals.
Other Neurotic Symptoms .—Janet's studies at the Salpetriêre seem to show that the alterations of memory which bring about what we call secondary personality (the forgetting of certain phases of existence and the maintenance for a time of a small portion of consciousness and memory quite apart from the rest) correspond with alterations in the physical basis of memory, that is, in the circulation to certain portions of the brain, and probably also in the modes of association of brain cells. They occur, particularly, in connection with certain phenomena of hystero-epilepsy so-called, or with the deeper forms of epilepsy in which there are various paresthesias, hyperesthesias and anesthesias as a consequence of a disturbance of the circulation in the central nervous system; and probably also of the connections made by neurons and the movements of neuroglia cells in making and breaking these connections. These alterations of memory are represented physically by such cases as those in which patients so lose their consciousness of sensation that they are unable to tell even where their feet are. As they themselves say, "they have lost their legs." In these cases, patients are often very deaf or have a limited auditory power, and their fields of vision are extremely narrowed. In most of these cases, recovery of the original personality takes place after hypnosis. This probably represents a relaxation of that short-circuiting, within the nervous system, which brought about the curious phenomenon studied as secondary personality.
Dual Dispositions.—The studies of secondary personality that we have had seem to show us persons under the influence of some strong suggestion, in what is practically a hypnotic condition. There are many similarities between the actions and the mentality of hypnotics and of those in secondary-personality conditions. The individuals are, for the moment, unable to recall what happened in other states. They may be very different in disposition, gentle and tractable in one state, but morose and difficult to get along with in another. Such differences are, however, only exaggerations of the variations of normal personality. There are times when, under the stress of circumstances, even the mildest of men and women become querulous and difficult. It is often noted that people are much more gentle and careful in their relations with some people than with others. Men who are known in their business relations to be quiet, easy to get along with, are at times bears in their homes. This is a matter of the exercise of inhibition for certain mental qualities, and this inhibition is neglected for some places and persons. An American humorist said not long since that a young girl passing a weekend at the house of a friend, should remember that she is expected to be unselfish, thoughtful for others, and ready to help her hostess to make it pleasant for others, so that the party may be successful. He adds that, of course, as soon as she returns home she should be perfectly natural again.
At least in a limited sense, all of us have buried in us secondary personalities that are due to a lack of control of ourselves, or occasionally to a lack of such initiative as makes possible the best that is in us. The secondary personality of some people, that side of their characters that their friends see only rarely, is the best side of them. Many people, under the demand of some great purpose, rise up to be really heroic in quality, yet in the commonplace relations of life they are quite ordinary. The secondary personality in either of these cases is not something abnormal. It is due to a tapping of deeper levels in personality than most people realize that they possess. When taken in connection with hypnotism and the power of suggestion over susceptible individuals, these adumbrations of the deeper problem of secondary personality as the psychologists have discussed it, furnish the best data for its fuller explanation. Excuses for actions founded on secondary personality must either rest ultimately on insanity, or else on that lack of inhibition which constitutes the source of so many of our actions that we regret.
People who are susceptible to hypnotism may remember absolutely nothing of what occurs to them in the hypnotic condition, though they will recall it without any difficulty if during hypnosis it is suggested to them that they should remember it. This represents the most prominent feature of secondary personality; the individuals who are affected by it do not recall in one state of personality what happens to them in the other. In the two states they are very different in character. These differences have been much emphasized with regard to a few cases that are especially abnormal and have not attracted much attention in cases where the differences are slight. Indeed, in a number of the cases where secondary personality asserted itself, the differences in the character of the individual in the two states were practically nil. The only difference was a lapse of memory for certain important events. Considerations such as these help in the understanding and psychotherapy of what are sometimes puzzling cases of apparent dualism of disposition.
What we have to do with here are the suggestions of secondary personality which neurotic patients have been inclined to make to themselves as a consequence of the interest in the subject in recent years. The investigations of Head and of Gordon Holmes have undoubtedly shown, however, that there are true pathological conditions associated with certain definite and very marked manifestations of dualism of disposition consequent upon lesions in the optic thalamus. These cases so far as can be judged at the present time, at least, are quite rare and at most would account for duality and not for the plurality of personality that has come to be discussed by certain enthusiastic neurologists in recent years. The magnificent work done on this shows how much may yet be accomplished in the elucidation of nervous diseases by faithful study and investigation of selected cases.
CHAPTER IX
HYPNOTISM
Hypnotism is popularly supposed to be a mysterious psychological process by which susceptible subjects are brought under the influence of a person possessing some marvelous power over others' minds and wills. According to this supposition, during the periods in which the subjects are under this influence, they either have some new source of energy transferred to them from the operator's strong personality, or else they share to some extent in the will power possessed by him. In the midst of the sub-consciousness which characterizes the hypnotic condition, then, they are in some way endowed with new strength, which enables them to overcome obstacles to physical or mental health, some of which seemed at least quite insurmountable under their normal condition.
As a matter of fact, hypnotism is much simpler than this, consisting merely of a state of mental absorption in which all distracting thoughts are for the moment warded off, and only such thoughts as are suggested by the hypnotist reach the consciousness of the patient. The essence of hypnotism is the concentration of mind on one idea or only a few ideas dictated by the hypnotist. This mental concentration produces the effect of greater strength, whether apparent or real, to carry out the purposes connected with those thoughts. It is usually considered that hypnotism involves sleep, and in some cases it does. This is often undesirable. True, therapeutic hypnosis leaves at least certain senses of the subject open to perceive such things as are presented by the hypnotist's suggestion though these senses may be, and usually are, quite closed to all other perceptions. In a great many cases, though there is a real hypnotic condition, a state resembling true sleep does not occur. There is only a more or less complete concentration of attention on the suggestions of the operator, and a complete cessation of all spontaneous thought, or of all suggestions that might come in ordinary ways from the subject's own senses.
Effects of Hypnotism.—Most people have a very erroneous notion with regard to the effects of hypnotism. Some expect that the hypnotic sleep will work miracles. Nothing is more common in the experience of one who is known to employ hypnotism, even occasionally, than to have a patient who is addicted to some habit, alcoholic, drug, or sexual, ask, "Do you hypnotize?" If an affirmative answer is given, the patient proceeds to say that he has heard that one can be hypnotized, and then all the tendency to fall back into the old habit is immediately lost,