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1 .This is Scientific American 60-Second Mind, I'm Christie Nicholson. Got a minute?
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2 .Conventional wisdom once had it that each brain region is responsible for a specific task.
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3 .And so we have the motor cortex for handling movements, and the visual cortex, for processing sight.
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4 .And scientists thought that such regions remained fixed for those tasks beyond the age of three.
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5 .But within the past decade researchers have realized that some brain regions can pinch hit for other regions, for example, after a damaging stroke.
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6 .And now new research finds that the visual cortex is constantly doing double duty, it has a role in processing not just sight, but sound.
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7 .When we hear, we see a siren.
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8 .In the study, scientists scanned the brains of blindfolded participants as the subjects listened to three sounds:
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9 .And scientist could tell what specific sounds the subjects were hearing just by analyzing the brain activity in the visual cortex.
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10 .The next step is to determine why the visual cortex is horning in on the audio action.
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11 .The researchers think the additional role conferred an evolutionary advantage: having a visual system primed by sound to see the source of that sound could have given humans an extra step in the race for survival.
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12 .Thanks for the minute, for Scientific American 60-Second Mind.I'm Christie Nicholson.
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