From a review of Musicophilia:

Tales of Music and the Brain
by Oliver Sacks


"Sacks open his book with a striking case, rather literally striking.  Tony Cicoria, a 42-year old orthopedic surgeon, was making a phone call to his mother when he was struck in the face by lightning. 

He thought he was dead immediately following the event, but sustained no serious injuries and went back to work a few weeks later.  But then, quite unexpectedly, he experienced an intense craving to listen to piano music - something he had never felt before. 

He started listening to piano music all the time - couldn't get enough of it.  Then, a little later, he started hearing piano music in his head, insistently and powerfully; he felt the need to write it down, though he had no training in musical notation. 

Soon he was teaching himself to play the piano ... He had become, in effect, a completely new person, evidently because of his brain electrically rewired."

Source:  Colin McGinn in The New York Review of Books