Mirror Box

Mirror Box takes its cue from a simple device employed in the treatment of phantom‐limb pain. Invented
 by Vilayanur S. Ramachandran, the mirror 
box consists of an open‐topped box with 
two compartments divided by a mirror. Each 
of the compartments is accessible through a circular hole in the box. The intact limb is passed through one of the holes and viewed by way of the mirror, resulting in the visual impression that there are two intact limbs. The box “tricks” the brain into perceiving an amputated body part as still extant, enabling the cognitive apparatus to release, for example, a perceived painful cramp in the phantom limb.