![]() The illusion's effectiveness was influenced by the perceived difficulty of moving the hidden hand to the position viewed in the mirror. "All of a sudden during our experiments, you'd hear a little laugh of surprise when people experienced this neat sensation of feeling like their hand flipped, even though it did not move," Medina said. It's the sense that allows you to touch your nose with confidence even with your eyes closed.Īfter synchronous opening and closing of the two hands, the study participants felt that the hand behind the mirror rotated or completely flipped to match the hand reflection. Proprioception is your so-called "sixth sense," the sense of where your body is in space, that comes from your muscles and joints. In their novel illusion, study participants placed their hands in opposite postures (one hand palm-up, the other palm-down), creating a conflict between visual and proprioceptive feedback for the hand behind the mirror. Their study, which is supported by the National Science Foundation, appears in Scientific Reports, a multidisciplinary, open access journal from the publishers of Nature. Now, a new version of the mirror box illusion, developed by University of Delaware brain scientist Jared Medina and doctoral student Yuqi Liu, is pulling back more of the curtain on how the brain processes multiple sensory inputs to perceive our bodies and the world around us. This classic "mirror box" illusion has been used in a number of neuroscience studies, including with amputees as a possible therapy to alleviate phantom limb pain, where it may help the brain re-map and adapt to a missing limb. ![]() Within a minute, you'll feel as though the hand you see reflected in the mirror is your right hand and it's right next to the mirror - even though the hidden hand did not move. ![]() Now tap the table surface with both hands while looking at your reflection. Place your left hand on the table in front of the mirror's reflective surface and your right hand behind the mirror, about six inches away, where you can't see it. Here's one you can try using a tabletop mirror. ![]()
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