Both the sensory and the motor cortices of the right cerebral portion of the brain contain a sequence of points known as the “homunculus” which corresponds to points in the body (see Exhibit 1, next page).
Consequently, if the left hemisphere can be distracted either through boredom or through reduction to a soporific, semi-sleep state, external stimuli to include hypnotic suggestions are allowed to pass unchallenged into the right hemisphere where they are accepted and acted upon directly.