Technological advances are providing us with prove of the particular brain activity produced by a hypnotic state. Here is an article that talks about the use of Magnetic Ressonance Imaging (MRI) and the effect of hypnosis in inducing colour hallucinations.
“How do you feel about being able to control one’s own perception and experiences at will? Neuroscientists at U.K’s Hull University hint at this possibility when they performed an experiment asking prescreened people to look at gray patterns and asked to visualize color. What is interesting about this experiment is that it was done in part with hypnosis.” Extract of article from
The Psych Life . Articles are written by junior and senior level psychology students who attend California State University, Stanislaus.