Abstract
Delayed sleep and meal times promote metabolic dysregulation and obesity. Altered coordination of sleeping and eating times may impact food-reward valuation and interoception in the brain, yet the independent and collective contributions of sleep and meal times are unknown. This randomized, in-patient crossover study experimentally manipulates sleep and meal times while preserving sleep duration (7.05±0.44 h for 5 nights). Resting-state functional magnetic resonance imaging scans (2 × 5-minute runs) were obtained for four participants (three males; 25.3±4.6 years), each completing all study phases (normal sleep/normal meal; late sleep/normal meal; normal sleep/late meal; and late sleep/late meal). Normal mealtimes were 1, 5, 11 and 12.5 h after awakening; late mealtimes were 4.5, 8.5, 14.5 and 16 h after awakening. Seed-based resting-state functional connectivity (RSFC) was computed for a priori regions-of-interest (seeds) and contrasted across conditions. Statistically significant (P<0.05, whole-brain corrected) regionally specific effects were found for multiple seeds. The strongest effects were linked to the amygdala: increased RSFC for late versus normal mealtimes (equivalent to skipping breakfast). A main effect of sleep and interaction with meal time were also observed. Preliminary findings support the feasibility of examining the effects of sleep and meal-time misalignment, independent of sleep duration, on RSFC in regions relevant to food reward and interoception.
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Acknowledgements
We thank Clare Kelly, PhD and Mariana Lazar, PhD for helpful discussions of scan sequence selection and analysis approaches, and Krishna Somandepalli, MS for assistance in data processing. NIH grant R56HL119945, New York Obesity Nutrition Research Center DK26687, and National Center for Advancing Translational Sciences UL1 TR000040 (formerly the National Center for Research Resources, UL1 RR024156).
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Yoncheva, Y., Castellanos, F., Pizinger, T. et al. Sleep and meal-time misalignment alters functional connectivity: a pilot resting-state study. Int J Obes 40, 1813–1816 (2016). https://doi.org/10.1038/ijo.2016.132
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DOI: https://doi.org/10.1038/ijo.2016.132
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