The science of using your expectations to relieve pain

Traditional healing is used around the world, from acupuncture to laying of hands to yoga. How do these alternative remedies work to heal the body and the brain? As part of our series ScienceScope and in cooperation with the Pulitzer Center on Crisis Reporting, the NewsHour’s Nsikan Akpan ventures to Oaxaca, Mexico to dive into the neuroscience of expectation.