Sleep irregularity negatively affects the brain and overall health
Multiple clinical and review studies demonstrate that sleep irregularity and circadian rhythm disruptions negatively impact cognitive function, emotional well-being, cardiovascular health, and overall physiological homeostasis.
The retrieved papers consistently support the claim that sleep irregularity and circadian disruption negatively affect brain function (cognition, mood, delirium) and overall health (cardiovascular, metabolic, and systemic health). No papers refute the claim.
Hongjie Zong, Yifei Fei, Ningang Liu. Circadian Disruption and Sleep Disorders in Astronauts: A Review of Multi-Disciplinary Interventions for Long-Duration Space Missions. 2025. https://doi.org/10.3390/ijms26115179
Paper 0 finds that circadian and sleep disruptions impair physiological health, psychological health, and cognitive function.
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Young-Im Kim, Eunbi Kim, Youngjun Lee, Jonghoon Park. Role of late-night eating in circadian disruption and depression: a review of emotional health impacts. 2025. https://doi.org/10.20463/pan.2025.0003
Paper 1 links irregular schedules and late-night eating to circadian disruption and emotional or metabolic health disturbances.
Shea SA, Scheer FAJL, Gumz ML, Eikenberry SA, Qian J, Thosar SS, Sole MJ, Martino TA. Unlocking the potential of circadian biology for cardiovascular health.. 2026. https://doi.org/10.1152/physrev.00015.2025
Paper 2 demonstrates that chronic circadian misalignment and irregular sleep-wake cycles increase cardiovascular risk.
Aggarwal B, Gao Y, Alfini A, Azarbarzin A, Anafi RC, Glazer Baron K, Bautch VL, Bowles N, Broussard JL, Brown M, Cheng P, Cook SH, Cortese R, Fernandez FX, Galis Z, Johnson DA, Jelic S, Lipton JO, Lutsey PL, Miao Q, Ordovas JM, Prather AA, Swirski FK, Tasali E, Vargas I, Grandner MA, Lloyd-Jones D. Sleep and circadian rhythms in cardiovascular resilience: mechanisms, implications, and a Roadmap for research and interventions.. 2026. https://doi.org/10.1038/s41569-025-01188-1
Paper 3 notes that sleep and circadian rhythm disruptions exacerbate conditions like hypertension, diabetes, and obesity.
Katie L Stone. INTERPRETING ASSOCIATIONS OF SLEEP/CIRCADIAN RHYTHMS WITH COGNITIVE OUTCOMES: CHALLENGES AND FUTURE DIRECTIONS. 2024. https://doi.org/10.1093/geroni/igae098.0850
Paper 4 identifies sleep fragmentation and irregular sleep timing as potential risk factors for cognitive decline and dementia.
Melone MA, Gehlbach BK. Sleep, circadian rhythms and outcomes in intensive care unit.. 2026. https://doi.org/10.3389/fneur.2026.1790266
Paper 6 links disrupted sleep architecture and circadian dysrhythmias to acute brain dysfunction, delirium, and inflammation.
Blank L, Khorsandi J, England-Kennedy E, Banerjee S, Kopera-Frye K, Sagaribay R, Khubchandani J, Batra K. When the Clock Shifts: A Comprehensive Review of Daylight-Saving Time (DST), Circadian Disruption, and Neuropsychological Risk in Chronic Mental Illness.. 2026. https://doi.org/10.3390/brainsci16050522
Paper 8 shows that abrupt circadian disruptions impair sleep regulation, cognitive performance, and emotional stability.
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