Why can neurosurgeons operate directly on brain tissue during awake surgery without causing pain?
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While the brain processes pain signals from the rest of the body, the brain tissue itself completely lacks nociceptors (pain receptors). This unique trait allows surgeons to map vital brain functions in real-time by talking to patients while operating on their cerebral cortex. Photo: Shigeru23, Wikimedia Commons, CC BY-SA 3.0.
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Source: Wikipedia (CC BY-SA)
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