Hippocrates revolutionized medical thinking when he moved the seat of reason from the heart to the head and wrote: "From the brain, and from the brain only, arise our pleasures, joys, laughter and jests, as well as our sorrows, pains, griefs and tears." Since then (circa 400 B.C.), says famed Neurosurgeon Wilder Penfield, a few highly localized parts of the brain have been shown to control vision, hearing, speech, some physical sensations and most movements, but by far the greater part of the brain remains unexplored. To fill in one of the blanks on the cerebral map, Dr. Penfield has just...
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