Alberto Villoldo, Ph.D., a psychologist and medical anthropologist, has studied the healing practices of the Amazon and Inka shamans for more than 25 years. While at San Francisco State University, he founded the Biological Self-Regulation Laboratory to study how the mind creates psychosomatic health and disease. Dr. Villoldo directs
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 Shaman, Healer, Sage; The Four Insights, Courageous Dreaming and Power Up Your Brain.

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