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Brain scans show specific neuronal response to junk food when sleep-restricted

Date:
June 10, 2012
Source:
American Academy of Sleep Medicine
Summary:
The sight of unhealthy food during a period of sleep restriction activated reward centers in the brain less active than with adequate sleep, a new study using fMRI scans shows. Previous research has shown restricted sleep leading to increased food consumption in healthy people and increased desires for sweet and salty food. Results from this study provides additional support for the role of inadequate sleep in appetite-modulation and obesity.

The sight of unhealthy food during a period of sleep restriction activated reward centers in the brain that were less active when participants had adequate sleep, according to a new study using brain scans to better understand the link between sleep restriction and obesity.

Researchers from St. Luke's -- 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. Results were compared.

"The same brain regions activated when unhealthy foods were presented were not involved when we presented healthy foods," said Marie-Pierre St-Onge, PhD, the study's principal investigator. "The unhealthy food response was a neuronal pattern specific to restricted sleep. This may suggest greater propensity to succumb to unhealthy foods when one is sleep restricted."

Previous research has shown that restricted sleep leads to increased food consumption in healthy people, and that a self-reported desire for sweet and salty food increases after a period of sleep deprivation. St-Onge said the new study's results provide additional support for a role of short sleep in appetite-modulation and obesity.

"The results suggest that, under restricted sleep, individuals will find unhealthy foods highly salient and rewarding, which may lead to greater consumption of those foods," St-Onge said. "Indeed, food intake data from this same study showed that participants ate more overall and consumed more fat after a period of sleep restriction compared to regular sleep. The brain imaging data provided the neurocognitive basis for those results."


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The above story is based on materials provided by American Academy of Sleep Medicine. Note: Materials may be edited for content and length.


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American Academy of Sleep Medicine. "Brain scans show specific neuronal response to junk food when sleep-restricted." ScienceDaily. ScienceDaily, 10 June 2012. <www.sciencedaily.com/releases/2012/06/120610151447.htm>.
American Academy of Sleep Medicine. (2012, June 10). Brain scans show specific neuronal response to junk food when sleep-restricted. ScienceDaily. Retrieved July 26, 2014 from www.sciencedaily.com/releases/2012/06/120610151447.htm
American Academy of Sleep Medicine. "Brain scans show specific neuronal response to junk food when sleep-restricted." ScienceDaily. www.sciencedaily.com/releases/2012/06/120610151447.htm (accessed July 26, 2014).

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