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Continue to ChatIf we could look through the skull into the brain of a consciously thinking person, and if the place of optimal excitability were luminous, then we should see playing over the cerebral surface, a bright spot with fantastic, waving borders constantly fluctuating in size and form, surrounded by a darkness more or less deep, covering the rest of the hemisphere. - Ivan Pavlov from https://whatsmyquote.com/quote/if-we-could-look-through-the-skull-into-the-brain-of-a-consciously-thinking-person-and-if-the-place-of-optimal