Andrew Huberman· PhD
Ramachandran's done beautiful experiments, showing that if you give people what's called a mirror box, this is a box in which you insert an intact limb, and there are some mirrors that give you the visual impression that the other limb is still present, and you move the intact limb and you get a mirror image of the non-existent, but nonetheless a visual image of the phantom limb moving, that you can resolve some of the pain of a limb that feels otherwise cramped up.