Experiments show that your brain accepts the tool as part of your body, and changes your spacial map to fit.
http://news.bbc.co.uk/2/hi/science/nature/8112873.stm
"More telling, however, was an experiment performed with the participants blindfolded after the tool use.
After an experimenter touched the participants' elbow and middle fingertip, they were asked to point using the other hand to those two locations.
After a session of using the tool, the participants indicated locations further apart than before tool use: they seemed to perceive the tool-using arm as longer."
Is this why I always drop the nut after changing from the ratchet to my fingers?






