Physicality: What is It?

There is a lot of talk these days about the brain: even the magazine of the Sunday NY Times of Jan. 11 shows stylized "neurons" spelling something like "your brain."  A lot of this is talk unattached to actual experience.  In fact, people experience their own mental activity differently.  It is a personal affair.

Yesterday I received an email linked to an article about Beethovian rhythms showing a marked resemblance to a heart experiencing arhythmia.  Why not?  As he did not hear what almost everyone else hears is it not possible, even probable, that he could pick up bodily signals of which most people are unaware, and that these would become primary sources of insight for him?