It is commonly quoted in popular literature that 10% of people are "highly hypnotizable". Given a set of 10 suggestions, such people would have 7 or more suggestions become active. On the other end of the spectrum, there are people who are very hard to hypnotize and will have 0 out of 10 suggestions become active. Everyone else falls somewhere in between.
I'm interested if the person's susceptibility to hypnosis can be altered? Can a person who would previously respond to 7/10 suggestions be made to respond to 1/10, thus becoming hard to hypnotize (or vice versa)?
If so, what is the mechanism behind such change - is it localized to some brain area?