ush your teeth, the toothbrush may actually become part of your arm – at least as far as your brain is concerned. That’s the conclusion of a study showing perceptions of arm length change after people handle a mechanical tool. The brain maintains a physical map of the body, with different areas in charge of different body parts. Researchers have suggested that when we use tools, our brains incorporate them into this map.
« Grey hair may be protecting us from cancer Email patterns can predict impending doom »
