One sleepless night weakens resolve in the face of doughnuts

One sleepless night weakens resolve in the face of doughnuts

Sleep loss changes brain activity, food preferences

By Laura Sanders, 15:56 PM August 9, 2013

An all-nighter tweaks the brain, weakening people’s willpower and making them more likely to succumb to double bacon cheeseburgers, a new study suggests. The results help explain the link researchers have noted between sleep loss and obesity.

After staying awake through the night in a sleep lab, 23 people looked at pictures of food while undergoing brain scans. When calorie-laden foods such as doughnuts and potato chips appeared, brain activity changed in two ways: People showed a diminished r...

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