Brains 'Always Running': Insomnia is a 24/7 Disorder

Scientists thought sound sleepers would have more alert and plastic brains. But a test showed that insomniacs brains' reacted like a light switch that is always on. Steven Errico / Getty Images

Sleeplessness may have its roots in brain wiring that affects the way our minds work. It doesn’t mean insomniacs are high strung, though.

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