Jill Taylor gave this talk at the TED2008 (Technology, Entertainment, Design)--she is a neuro-anatomist studying the structures of the brain, and this is her description of the stroke she suffered.
It's tremendously fascinating in the way it gets into the way the brain works and the ordeal she went through brought tears to my eyes.
Set aside 18 minutes of your day and watch this. It truly is amazing. If you can't watch it now, try to watch it later. Seriously. Don't miss out.