It is significant that, in many instances of amnesia, when the patient is, as it seems, completely unable to recall his experiences since, or prior to, the onset of the symptom, hypnosis often helps to revive his memory. The dependence of recall on suggestion, and through it on the autonomic nervous system, is thereby confirmed. In order to appreciate fully the importance of these phenomena, however, we must get acquainted with the disease called hysteria. The symptoms of this malady resemble in many respects the subject's behavior in a hypnotic trance. The parallelism is so remarkably close that it is reasonable to. suspect that the bodily mechanism underlying hysteria and hypnosis is essentially the same.
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