This one is a slippery slope; but, I’ll give it a go…. The so-called “Mind–body problem” [1] is a classical philosophical issue, and of course relates to the eternal issue of “Soul” [2]. I believe that it is widely accepted today that mind is an “emergent property” [3] of brain; whereas, self as identity is very likely illusory [4], albeit very useful (like one’s hand for instance)…. So, I guess in this sense, you are not you; therefore, your brain is also not you…. Who are you? At the end of the day, you are everything…. ;^)
[1] http://en.wikipedia.org/wiki/Mind–body_problem
[2] http://en.wikipedia.org/wiki/Soul
[3] http://en.wikipedia.org/wiki/Emergent_properties
[4] http://en.wikipedia.org/wiki/Self