Consequently, induction of the suggestion that the left leg is numb, if it reaches the right hemisphere unchallenged and is referred to the appropriate area of the sensory cortex, will result in an electrical reaction being generated that will induce the feeling of numbness.
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).