Application of Photic Feedback System to Psychosomatic Medicine :

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We applied the photic feedback system, which we had previously developed, for the medical treatment of the patients of neurosis, depressive disorders and psychosomatic disorders. We evaluated the system's effects to verify it's efficiency in promoting relaxation. The measurement of the physiological index of the autonomic nervous system for the patients of the neurosis indicated more relaxation according to the nervous index of electromyogram and skin conductance level than the control group of simple rest with eyes closed. The index of the cardiovascular system indicated conversely a tendency toward activation. In the psychological test, the photic feedback group's mood became more relaxed than the control group. We assume that photic feedback leads people to a kind of altered state of consciousness and psycho-physiological reaction which differs from ordinary rest with eyes closed, and therefore is efficient for relaxation. Moreover, according to the medical diagnosis, the photic feedback treatment was significantly effective for patients of depressive disorders and eating disorders who are normally difficult to treat. It appears that the photic feedback is efficient for rhythm disorders peculiar to these illness. However, we don't know yet how the mechanism works.

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