Between science and mystery, the placebo effect is one of the strangest phenomena of medicine.

Between science and mistery, the placebo effect is one of the strangest phenomena in medicine. It is some kind of prodigy, situated at the border of science, between psychology and physiology, and which is paradoxally very important in the development of new drugs. Slowly, scientists are starting to understand its mechanisms. For the first time, American scientists have discovered what goes on in our brain during a placebo effect, using the latest imaging technologies. And what about homeopathy ? Find out in Matiere Grise...