Washington: The sight of unhealthy food during a period of sleep restriction activates reward centres in the brain that are less active when an individual gets adequate sleep, a new study has revealed.In the new study, which used brain scans to better understand the link between sleep restriction and obesity, researchers from Roosevelt Hospital Center and Columbia University in New York performed functional magnetic resonance imaging (fMRI) on 25 men and women of normal weights while they looked at images of healthy and unhealthy foods.The scans were taken after five nights in which sleep was either restricted to four hours or allowed to continue up to nine hours, and the results were then compared.“The same brain regions activated when unhealthy foods were presented were not involved when we presented healthy foods,” Marie-Pierre St-Onge, principal investigator of the study, said.
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