The mind is divided into four areas; all of which must be affected to enter the state of hypnosis. The four areas are;
The Primitive Area
Part of the subconscious and established from birth. It contains the fight/flight response and the fears of falling and loud noises.
The Modern Memory Area
Also a part of the subconscious and contains all of a person's memories (Knowns).
The Conscious Area
Formed around the age of 8 or 9, and is the logical, reasoning, decision making part of the mind.
The Critical Area
Also formed around the age of 8 or 9, filters message units and accepts or rejects them from entering into the Modern Memory. If the Critical Area is overwhelmed, it breaks down, activating fight/flight, causing a hypersuggestible state, that is, hypnosis.