Or there and back again: Dr. Jill Bolte Taylor got a research opportunity few neuroscientists would wish for: she had a stroke and witnessed the boundaries, set by the left cerebral cortex of the brain ..disappear. She experienced the âenormous and expansive universeâ where we live through the parallel portals of the right cerebral cortex, which was unaffected by the stroke. She returns to tell an astonishing tale.