Came across this article about a most interesting study. In some subtle ways (well, perhaps not so subtle depending on one's point of view) the study touches on some of the issues frequently and hotly debated on this thread.
[URL]http://www.hopkinsmedicine.org/news/media/releases/the_musical_brain_novel_study_of_jazz_players_sho...[/URL]
[URL]http://www.hopkinsmedicine.org/news/media/releases/the_musical_brain_novel_study_of_jazz_players_sho...[/URL]