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Sarah Laxhmi Chellappa, Ph.D., M.D.

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Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
  1. Prayag A., Münch M., Aeschbach D., Chellappa S.L., Gronfier C. Light modulation of human clocks, wake, and sleep. Clocks and Sleep. 2019; 1(1):193-208. View Publication.
  2. Gaggioni G, Ly JQM, Muto V, Chellappa SL, Jaspar M, Meyer C, Delfosse T, Vanvinckenroye A, Dumont R, Coppieters 't Wallant D, Berthomier C, Narbutas J, Van Egroo M, Luxen A, Salmon E, Collette F, Phillips C, Schmidt C, Vandewalle G. Age-related decrease in cortical excitability circadian variations during sleep loss and its links with cognition. Neurobiol Aging. 2019 Feb 13; 78:52-63. PMID: 30877839.
    Citations:    
  3. Chellappa SL, Morris CJ, Scheer FAJL. Effects of circadian misalignment on cognition in chronic shift workers. Sci Rep. 2019 Jan 24; 9(1):699. PMID: 30679522.
    Citations:    Fields:    
  4. Scheer FAJL, Chellappa SL, Hu K, Shea SA. Impact of mental stress, the circadian system and their interaction on human cardiovascular function. Psychoneuroendocrinology. 2019 Jan 16; 103:125-129. PMID: 30682628.
    Citations:    Fields:    
  5. Steinemann A, Bromundt V, Chellappa SL, Frey S, Schmidt C, Schlote T, Goldblum D, Cajochen C. Evaluation of Visual Comfort and Mental Effort Under Different Light Conditions for Ultraviolet-Absorbing and Additional Blue-Filtering Intraocular Lenses for Cataract Surgery. Klin Monbl Augenheilkd. 2019 Jan 07. PMID: 30616288.
    Citations:    Fields:    
  6. Gaggioni G, Ly JQM, Chellappa SL, Coppieters 't Wallant D, Rosanova M, Sarasso S, Luxen A, Salmon E, Middleton B, Massimini M, Schmidt C, Casali A, Phillips C, Vandewalle G. Human fronto-parietal response scattering subserves vigilance at night. Neuroimage. 2018 07 15; 175:354-364. PMID: 29604455.
    Citations:    Fields:    Translation:Humans
  7. Chellappa SL, Morris CJ, Scheer FAJL. Daily circadian misalignment impairs human cognitive performance task-dependently. Sci Rep. 2018 Feb 14; 8(1):3041. PMID: 29445188.
    Citations: 2     Fields:    
  8. Chellappa SL, Steiner R, Oelhafen P, Cajochen C. Sex differences in light sensitivity impact on brightness perception, vigilant attention and sleep in humans. Sci Rep. 2017 Oct 27; 7(1):14215. PMID: 29079823.
    Citations: 2     Fields:    
  9. Chellappa SL, Lasauskaite R, Cajochen C. In a Heartbeat: Light and Cardiovascular Physiology. Front Neurol. 2017; 8:541. PMID: 29104560.
    Citations:    
  10. Birchler-Pedross A, Frey S, Götz T, Brunner P, Knoblauch V, Wirz-Justice A, Chellappa SL, Cajochen C. Subjective Mood in Young Unmedicated Depressed Women under High and Low Sleep Pressure Conditions. Biology (Basel). 2016 Dec 09; 5(4). PMID: 27941666.
    Citations:    
  11. Cajochen C, Chellappa SL. Commentary: Melanopsin Regulates Both Sleep-Promoting and Arousal-Promoting Responses to Light. Front Neural Circuits. 2016; 10:94. PMID: 27899883.
    Citations: 1     Fields:    Translation:Humans
  12. Chellappa SL, Gaggioni G, Ly JQ, Papachilleos S, Borsu C, Brzozowski A, Rosanova M, Sarasso S, Luxen A, Middleton B, Archer SN, Dijk DJ, Massimini M, Maquet P, Phillips C, Moran RJ, Vandewalle G. Circadian dynamics in measures of cortical excitation and inhibition balance. Sci Rep. 2016 09 21; 6:33661. PMID: 27651114.
    Citations: 5     Fields:    Translation:Humans
  13. Muto V, Jaspar M, Meyer C, Kussé C, Chellappa SL, Degueldre C, Balteau E, Shaffii-Le Bourdiec A, Luxen A, Middleton B, Archer SN, Phillips C, Collette F, Vandewalle G, Dijk DJ, Maquet P. Local modulation of human brain responses by circadian rhythmicity and sleep debt. Science. 2016 Aug 12; 353(6300):687-90. PMID: 27516598.
    Citations: 19     Fields:    Translation:Humans
  14. Ly JQ, Gaggioni G, Chellappa SL, Papachilleos S, Brzozowski A, Borsu C, Rosanova M, Sarasso S, Middleton B, Luxen A, Archer SN, Phillips C, Dijk DJ, Maquet P, Massimini M, Vandewalle G. Circadian regulation of human cortical excitability. Nat Commun. 2016 06 24; 7:11828. PMID: 27339884.
    Citations: 10     Fields:    Translation:Humans
  15. Meyer C, Muto V, Jaspar M, Kussé C, Lambot E, Chellappa SL, Degueldre C, Balteau E, Luxen A, Middleton B, Archer SN, Collette F, Dijk DJ, Phillips C, Maquet P, Vandewalle G. Seasonality in human cognitive brain responses. Proc Natl Acad Sci U S A. 2016 Mar 15; 113(11):3066-71. PMID: 26858432; PMCID: PMC4801294.
    Citations: 9     Fields:    Translation:Humans
  16. Vanvinckenroye A, Vandewalle G, Phillips C, Chellappa SL. Eyes Open on Sleep and Wake: In Vivo to In Silico Neural Networks. Neural Plast. 2016; 2016:1478684. PMID: 26885400; PMCID: PMC4738930.
    Citations: 1     Fields:    Translation:Humans
  17. 't Wallant DC, Muto V, Gaggioni G, Jaspar M, Chellappa SL, Meyer C, Vandewalle G, Maquet P, Phillips C. Automatic artifacts and arousals detection in whole-night sleep EEG recordings. J Neurosci Methods. 2016 Jan 30; 258:124-33. PMID: 26589687.
    Citations: 1     Fields:    Translation:Humans
  18. Viola AU, Gabel V, Chellappa SL, Schmidt C, Hommes V, Tobaldini E, Montano N, Cajochen C. Dawn simulation light: a potential cardiac events protector. Sleep Med. 2015 Apr; 16(4):457-61. PMID: 25813092.
    Citations: 1     Fields:    Translation:Humans
  19. Gabel V, Maire M, Reichert CF, Chellappa SL, Schmidt C, Hommes V, Cajochen C, Viola AU. Dawn simulation light impacts on different cognitive domains under sleep restriction. Behav Brain Res. 2015 Mar 15; 281:258-66. PMID: 25549858.
    Citations: 3     Fields:    Translation:Humans
  20. Ziegler E, Chellappa SL, Gaggioni G, Ly JQM, Vandewalle G, André E, Geuzaine C, Phillips C. A finite-element reciprocity solution for EEG forward modeling with realistic individual head models. Neuroimage. 2014 Dec; 103:542-551. PMID: 25204867.
    Citations: 1     Fields:    Translation:Humans
  21. Chellappa SL, Viola AU, Schmidt C, Bachmann V, Gabel V, Maire M, Reichert CF, Valomon A, Landolt HP, Cajochen C. Light modulation of human sleep depends on a polymorphism in the clock gene Period3. Behav Brain Res. 2014 Sep 01; 271:23-9. PMID: 24893318.
    Citations: 10     Fields:    Translation:Humans
  22. Chellappa SL, Ly JQ, Meyer C, Balteau E, Degueldre C, Luxen A, Phillips C, Cooper HM, Vandewalle G. Photic memory for executive brain responses. Proc Natl Acad Sci U S A. 2014 Apr 22; 111(16):6087-91. PMID: 24616488; PMCID: PMC4000819.
    Citations: 14     Fields:    Translation:Humans
  23. Gabel V, Maire M, Reichert CF, Chellappa SL, Schmidt C, Hommes V, Viola AU, Cajochen C. Effects of artificial dawn and morning blue light on daytime cognitive performance, well-being, cortisol and melatonin levels. Chronobiol Int. 2013 Oct; 30(8):988-97. PMID: 23841684.
    Citations: 16     Fields:    Translation:HumansCTClinical Trials
  24. Chellappa SL, Steiner R, Oelhafen P, Lang D, Götz T, Krebs J, Cajochen C. Acute exposure to evening blue-enriched light impacts on human sleep. J Sleep Res. 2013 Oct; 22(5):573-80. PMID: 23509952.
    Citations: 19     Fields:    Translation:HumansCTClinical Trials
  25. Chellappa SL, Cajochen C. Ultradian and circadian modulation of dream recall: EEG correlates and age effects. Int J Psychophysiol. 2013 Aug; 89(2):165-70. PMID: 23524011.
    Citations: 3     Fields:    Translation:Humans
  26. Chellappa SL, Viola AU, Schmidt C, Bachmann V, Gabel V, Maire M, Reichert CF, Valomon A, Götz T, Landolt HP, Cajochen C. Human melatonin and alerting response to blue-enriched light depend on a polymorphism in the clock gene PER3. J Clin Endocrinol Metab. 2012 Mar; 97(3):E433-7. PMID: 22188742.
    Citations: 24     Fields:    Translation:HumansCells
  27. Viola AU, Chellappa SL, Archer SN, Pugin F, Götz T, Dijk DJ, Cajochen C. Interindividual differences in circadian rhythmicity and sleep homeostasis in older people: effect of a PER3 polymorphism. Neurobiol Aging. 2012 May; 33(5):1010.e17-27. PMID: 22169200.
    Citations: 16     Fields:    Translation:Humans
  28. Birchler-Pedross A, Frey S, Chellappa SL, Götz T, Brunner P, Knoblauch V, Wirz-Justice A, Cajochen C. Higher frontal EEG synchronization in young women with major depression: a marker for increased homeostatic sleep pressure? Sleep. 2011 Dec 01; 34(12):1699-706. PMID: 22131608; PMCID: PMC3208848.
    Citations: 4     Fields:    Translation:Humans
  29. Chellappa SL, Münch M, Knoblauch V, Cajochen C. Age effects on spectral electroencephalogram activity prior to dream recall. J Sleep Res. 2012 Jun; 21(3):247-56. PMID: 21851439.
    Citations: 2     Fields:    Translation:Humans
  30. Viola AU, Tobaldini E, Chellappa SL, Casali KR, Porta A, Montano N. Short-term complexity of cardiac autonomic control during sleep: REM as a potential risk factor for cardiovascular system in aging. PLoS One. 2011 Apr 22; 6(4):e19002. PMID: 21544202; PMCID: PMC3081328.
    Citations: 12     Fields:    Translation:Humans
  31. Chellappa SL, Frey S, Knoblauch V, Cajochen C. Cortical activation patterns herald successful dream recall after NREM and REM sleep. Biol Psychol. 2011 May; 87(2):251-6. PMID: 21419827.
    Citations: 10     Fields:    Translation:Humans
  32. Chellappa SL, Steiner R, Blattner P, Oelhafen P, Götz T, Cajochen C. Non-visual effects of light on melatonin, alertness and cognitive performance: can blue-enriched light keep us alert? PLoS One. 2011 Jan 26; 6(1):e16429. PMID: 21298068; PMCID: PMC3027693.
    Citations: 51     Fields:    Translation:Humans
  33. Chellappa SL, Gordijn MC, Cajochen C. Can light make us bright? Effects of light on cognition and sleep. Prog Brain Res. 2011; 190:119-33. PMID: 21531248.
    Citations: 15     Fields:    Translation:HumansAnimals
  34. Cajochen C, Chellappa S, Schmidt C. What keeps us awake? The role of clocks and hourglasses, light, and melatonin. Int Rev Neurobiol. 2010; 93:57-90. PMID: 20970001.
    Citations: 11     Fields:    Translation:HumansAnimals
  35. Chellappa SL, Münch M, Blatter K, Knoblauch V, Cajochen C. Does the circadian modulation of dream recall modify with age? Sleep. 2009 Sep; 32(9):1201-9. PMID: 19750925; PMCID: PMC2737578.
    Citations: 4     Fields:    Translation:Humans
  36. Chellappa SL, Schröder C, Cajochen C. Chronobiology, excessive daytime sleepiness and depression: Is there a link? Sleep Med. 2009 May; 10(5):505-14. PMID: 18824409.
    Citations: 6     Fields:    Translation:Humans
  37. Chellappa SL, Araújo JF. Sleep disorders and suicidal ideation in patients with depressive disorder. Psychiatry Res. 2007 Oct 31; 153(2):131-6. PMID: 17658614.
    Citations: 24     Fields:    Translation:Humans
  38. Chellappa SL, Araújo JF. Excessive daytime sleepiness in patients with depressive disorder. Braz J Psychiatry. 2006 Jun; 28(2):126-9. PMID: 16810396.
    Citations: 17     Translation:Humans
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Funded by the NIH/NCATS Clinical and Translational Science Award (CTSA) program, grant number UL1TR001102, and through institutional support from Harvard University, Harvard Medical School, Harvard T.H. Chan School of Public Health, Beth Israel Deaconess Medical Center, Boston Children's Hospital, Brigham and Women's Hospital, Massachusetts General Hospital and the Dana Farber Cancer Institute.