Neuroanatomist Jill Bolte Taylor thinks she knows.
The most fascinating part of this talk for me was listening to Taylor describe the experience of her stroke in amazing detail. She's also a highly engaging, and engaged speaker.
While I can't advocate for the amount of lateralization she seems to believe in, her portrayals of the right and left brain are interesting.
From TED Talks: My stroke of insight.
Video length < 19 min.