It's nice that the paper is freely accessable to boot.

to be convenient: http://www.nature.com/srep/2013/130228/srep01319/full/srep01...

One observation, that the bbc didn't note, is that the decoder brain in the end had a representation of the encoder's whiskers.

To be a bit hyperbolic, the rat started to think it had two bodies. Or maybe it thought it had an extra set of whisker's some where. I can't quite imagine what the rat's body image would be.