It all started with a headache -- pounding pain behind the left eye -- that wouldn't go away.
A healthy 37-year-old at the time, Jill Bolte Taylor tried to shake the pain with a cardioworkout. But that didn't work.
Feeling rocky, Taylor headed for her shower. She noticed herself losing coordination and struggling with balance -- she had to lean against her shower wall.
The shower's roar startled her, and her sense of where her body began and ended was fading. "My perception of myself was that...