Playing with Perception

About 10 years ago, psychologists in Pennsylvania discovered an amazing illusion. They found that they could convince people that a rubber hand was their own by putting it on a table in front of them while stroking it in the same way as their real hand. 

The now-famous "rubber hand illusion" was not only a mind-blowing party trick, it was also hugely important in understanding how sight, touch and "proprioception" - the sense of body position - combine to create a convincing feeling of body ownership, one of the foundations of self-consciousness. 

In recent years that understanding has been explored further using increasingly freaky illusions. "The rubber hand illusion really inspired people," says Henrik Ehrsson, a neuroscientist at the Karolinska Institute in Stockholm, Sweden. 

He is one of many researchers who have taken the illusion and run with it, creating a whole new set of "bodily illusions" that mess with our sense of self in strange and disturbing ways. "We're doing all kinds of crazy stuff," he says.

From NewScientist.com. Click here for the full article.