A great book on this is My Stroke of Insight, written by a neuroscientist who had a massive left-hemisphere stroke. Her experience was horrific in many ways, absolutely beautiful in others.
I just watched that talk. Wow! She's a skilled public speaker; I felt her words as she was saying them. This talk inspired me to try meditating again. Thank you.
She also has a TED talk: https://www.ted.com/talks/jill_bolte_taylor_s_powerful_strok...