Alberto Villoldo, Ph.D., is a medical anthropologist, psychologist and shaman, who has studied the spiritual practices of the Amazon and the Andes for more than 30 years. While at San Francisco State University, he founded the Biological Self-Regulation Laboratory to study how the mind creates psychosomatic health and disease. Founder of The Four Winds Society, he instructs individuals throughout the world in the practice of energy medicine. Dr Villoldo has written numerous best-selling books, including Power Up Your Brain: The Neuroscience of Enlightenment (with David Perlmutter MD), Shaman, Healer, Sage; and WSJ best-seller One Spirit Medicine.