would do brain scans on people and it was fun and entertaining and amusing to bring in practiced booedist, a person who would speak in tongues. in laboratory in university of pennsylvania hospital, hook them up a machine to see what is going on with their brain and go ahead and do your practice. see what happens. it was exciting a little later on i have opportunity to talk to you more specifically about actually some of the things we've seen and found in the brain. what i realized was that is just one part of the discussion because it is great to know what happens in the brain when we're doing something but how does that change your brain over time if you keep doing it? that of course is really a big question because we see some people around us like loch and maybe perhaps a number of you have done practices for many, many years and the question is, if you're able it change your brain in the moment, are you also changing your brain over time? that is really what a lot of our new research is looking at because one of the things we started out was, is the brain of somebody who is deeply spi