It is only natural for someone in pain to attend to the body part that hurts. Yet this book tells the story of persistent pain having negative effects on brain function. The contributors, all leading experts in their respective fields of pain electrophysiology, brain imaging, and animal models of pain, strive to synthesize compelling and, in some ways, connected hypotheses with regard to pain-related changes in the brain. Together, they contribute their clinical, academic, and theoretical expertise in a comprehensive overview that attempts to define the broader philosophical context of pain (disentangling sensical from nonsensical claims), list the changes known to take place in the brains of individuals with chronic pain and animal models of pain, address the possible causes and mechanisms underlying these changes, and detail the techniques and analytical methods at our disposal to visualize and study these changes.