Hypnosis is a natural state, one that we experience daily. So, while people are often wary of hypnosis, thinking that it is an altered state and one is out of control, quite the opposite is true. You are in control, in fact it it is an intense state of focus. Driving a familiar route to work is a common example of operating on autopilot, without thinking about it.
Although heart rate and respiration may slow down, this is due to the relaxation involved in the “induction”process,often used progressive relaxation. Those symptoms are not the hypnotic state itself. Research into the hypnotic state has shown that there are different brainwave levels that are involved.
According to science.howstuffworks.com, “The most notable data comes from electroencephalographs (EEGs), measurements of the electrical activity of the brain. Extensive EEG research has demonstrated that brains produce different brain waves, rhythms of electrical voltage, depending on their mental state. Deep sleep has a different rhythm than dreaming, for example, and full alertness has a different rhythm than relaxation.”