Get Up And Do Something: Blink if your brain needs a rest

Get Up And Do Something Get up and Do Something is a program of the Delaware Coalition to Promote Physical Activity and Healthy Nutrition. Your source for optimal health.

Blink if your brain needs a rest Jan 2nd 2013, 05:36 Why do we spend roughly 10% of our waking hours with our eyes closed -- blinking far more often than is actually necessary to keep our eyeballs lubricated? Scientists have pried open the answer to this mystery, finding that the human brain uses that tiny moment of shut-eye to power down. The mental break can last anywhere from a split second to a few seconds before attention is fully restored, researchers from Japan's Osaka University found. During that time, scans that track the ebb and flow of blood within the brain revealed that regions associated with paying close attention momentarily go offline. And in the brief break in attention, brain regions collectively identified as the "Default Mode Network" power up.

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