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Lasers help prove parts of the brain 'sleep' while you're awake
Have you ever spaced out in the middle of a conversation without dozing off completely? MIT scientists now have a better idea why: only part of your brain is sleeping while the rest stays awake. Neuroscientists always suspected that, but the MIT team proved it in mice by using "optogenetics" to stimulate a part of the brain associated with sleep. They showed that the "thalamic reticular nucleus" (TRN) not only triggers slow sleep waves across the brain, but controls individual regions as well. The research could lead to safer anesthetic techniques and improved drugs for insomniacs.
