The parasympathetic nervous system is a part of the autonomic nervous system that controls bodily functions. It is responsible for the regeneration of the body and the buildup of energy reserves. Under the work of the parasympathetic nervous system the internal balance of the organism is restored. It is considered as an antagonist to the sympathetic nervous system. The autonomic nervous system plays a central role in hypnosis. It describes the autonomic nervous system, the part that escapes will control. The autonomic nervous system controls the internal organs, such as the heart, breathing and digestion. Hypnosis activates the parasympathetic nervous system, the calming part of the nervous system, and at the same time decreases the effect of the sympathetic nervous system, which is active under stress. The parasympathetic nervous system makes the heart beat more calmly and activates the regenerative When the parasympathetic nervous system is active, energy reserves are replenished and people recover.