TED Talk by Jill Bolte Taylor, brain scientist
In the video, she experienced in hallucination when the memory of left brain is dysfunctional by blood pressure.
One morning, she realized she was having a massive stroke.
As it happened -- as she felt her brain functions slip away one by one, speech, movement, understanding -- she studied and remembered every moment. This is a powerful story about how our brains define us and connect us to the world and to one another.