Interesting. I will add your comment to my notes on the brain, which will always be incomplete. If the study in Canada, confirmed by soldiers in Iraq that lost part of their brain but were able to re-develop previous skill, using part of the brain that remained, show that the brain is able to do any function with any re-trrained neuron. This means that any part of the brain may be doing the same or a different function any day. Even how we walk or think. This means that knowing the location tells you nothing about its current function.

As simple and hard as it seems to be, all the locations of a pain source are defined by the brain. We may say "my knee hurts" but the truth is "my brain tells me that my knee hurts" is closer to the truth.