It appears that hypnosis, under other names, has been used since the beginning of time. In fact, it has been insinuated that the earliest description of hypnosis may be portrayed in the Old Testament and in the Talmud. There is also evidence of hypnosis in ancient Egypt, some 3,000 years ago. However, the man credited with the development of what has become modern hypnosis is Friedrich Anton Mesmer, an Austrian physician. One day, Mesmer watched a magician on a street in Paris demonstrate that he could have spectators do his bidding by touching them with magnets. Fascinated by the demonstration, Mesmer believed the magnets had power of their own and from this belief developed his theory of "animal magnetism." He also believed that good health depended on having correct magnetic flow and that the direction of one's magnetic flow could be reversed easily. He further believed that he could direct this magnetic flow into inanimate objects, that could then be used for the good health of others. The term "mesmerism" came to be applied to his mystical workings. He experienced much success in helping the people of Paris as well as visitors who came from other countries, upon hearing of his powers. Later he was completely discredited by a special commission of the French Academy appointed by the King of France, causing him to leave the country. Two of the more famous members of the French Academy at the time were chairman of the commission Benjamin Franklin, American ambassador to France, and Dr. Guillotine, the inventor of the execution device.

Pierre Janet (1859–1947) reported studies on a hypnotic subject in 1882. Charcot subsequently appointed him director of the psychological laboratory at the Salpêtrière in 1889, after Janet had completed his PhD, which dealt with psychological automatism. In 1898, Janet was appointed psychology lecturer at the Sorbonne, and in 1902 he became chair of experimental and comparative psychology at the Collège de France.[60] Janet reconciled elements of his views with those of Bernheim and his followers, developing his own sophisticated hypnotic psychotherapy based upon the concept of psychological dissociation, which, at the turn of the century, rivalled Freud's attempt to provide a more comprehensive theory of psychotherapy.
Hypnosis is not a psychotherapeutic treatment or a form of psychotherapy, but rather a tool or procedure that helps facilitate various types of therapies and medical or psychological treatments. Only trained health care providers certified in clinical hypnosis can decide, with their patient, if hypnosis should be used along with other treatments. As with psychotherapy, the length of hypnosis treatment varies, depending on the complexity of the problem.
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