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1 .This is Scientific American's 60-Second Mind, I'm Karen Hopkin. Got a minute?
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2 .Consciousness is one of the biggest mysteries of the brain.
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3 .But maybe even more intriguing is what goes on when we lose consciousness and how do we find our way back?
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4 .Now, researchers studying anesthetized rats have discovered a handful of activity patterns that may help mark the path to consciousness.
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5 .The findings are in the Proceedings of the National Academy of Sciences.
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6 .The anesthetized brain is not actually quiet.
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7 .It shows patterns of spontaneous activity that can change over time.
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8 .But as the brain wakes, how do these random splashes of activity morph into the vigorous chatter of the conscious mind?
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9 .To find out, researchers looked for common patterns in the brain activity of rats as they were put under anesthesia and brought back.
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10 .And they discovered a number of patterns that took place consistently.
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11 .A few seemed to serve as stepping stones from deep anesthesia to waking,
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12 .as if the brain were finding its way through a maze of possible activity states on the way back to consciousness.
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13 .Knowing how the brain reboots itself may help physicians better predict recovery from brain injury or even coma,
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14 .and should lead to a better understanding of how to keep us under.
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15 .Thanks for the minute, for Scientific American's 60-Second Mind.I'm Karen Hopkin.
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