Research paper
Greer SM, Goldstein AN, Walker MP. The impact of sleep deprivation on food desire in the human brain. Nature Communications. 2013;4:2259. doi:10.1038/ncomms3259. PMID: 23922121. PMCID: PMC3763921.
Why we cite it
The fMRI study proposing a neural mechanism for how sleep deprivation shifts food choice — not willpower failure but a measurable ”double hit.” Scope: 23 healthy participants (13 female, mean age 20.5), repeated-measures counterbalanced design — strong for the acute effect it manipulated, and young. Published in Nature Communications, Greer, Goldstein, and Walker used functional brain imaging to show that sleep deprivation simultaneously impairs frontal cortex regions responsible for rational food evaluation (anterior cingulate, lateral orbital frontal, anterior insula — all significantly reduced) while amplifying amygdala reactivity to food desirability (significantly increased). The behavioral result: sleep-deprived participants desired an additional 600 ± 289 s.d. calories (T = 2.07, p = 0.05), specifically from high-calorie foods. Critically, hunger levels didn’t differ between conditions — participants weren’t eating more because they were hungrier, but because their brain’s evaluation system was compromised while its desire system was amplified. This completes the sleep–eating evidence triangle: csw06 (Nedeltcheva 2009) showed the behavioral outcome (more snacking), csh06 (Markwald 2013) showed the hormonal paradox (satiety signals overridden), and this paper shows the neural mechanism (impaired control + amplified desire).