Neuroanatomist Jill Bolte Taylor had an opportunity few brain scientists would wish for: 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.
(The following Urantia Book section is a discussion of our two-brain types, and aligns well with this article. ed.)
Brain Type p566:1 49:5.6 2. Brain-type series. The one physical uniformity of mortals is the brain and nervous system; nevertheless, there are three basic organizations of the brain mechanism: the one-, the two-, and the three-brained types. Urantians are of the two-brained type, somewhat more imaginative, adventurous, and philosophical than the one-brained mortals but somewhat less spiritual, ethical, and worshipful than the three-brained orders. These brain differences characterize even the prehuman animal existences.
p566:2 49:5.14 From the two-hemisphere type of the Urantian cerebral cortex you can, by analogy, grasp something of the one-brained type. The third brain of the three-brained orders is best conceived as an evolvement of your lower or rudimentary form of brain, which is developed to the point where it functions chiefly in control of physical activities, leaving the two superior brains free for higher engagements: one for intellectual functions and the other for the spiritual-counterparting activities of the Thought Adjuster.