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profileJeanne Frances Duffy, PH.D.

TitleAssociate Professor of Medicine
InstitutionBrigham and Women's Hospital
DepartmentMedicine
AddressBrigham & Women's Hospital
Sleep Medicine
221 Longwood Ave
Boston MA 02115
Phone617/732-7995
Fax617/732-4015
vCardDownload vCard (login for email)

Collapse Research 
Collapse research activities and funding
The research activities and funding listed below are automatically derived from NIH ExPORTER and other sources, which might result in incorrect or missing items. Faculty can login to make corrections and additions.
R01AG044416     (DUFFY, JEANNE F)Jun 15, 2013 - May 31, 2018
NIH/NIA
Treatment of Circadian Disruption from Shiftwork in Older Adults
Role: Principal Investigator

R01HL080978     (DUFFY, JEANNE F)Apr 14, 2006 - Mar 31, 2011
NIH/NHLBI
Circadian &Genetic Evaluation of Extreme Sleep Timing
Role: Principal Investigator

R21AT002571     (DUFFY, JEANNE F)Feb 1, 2005 - Jan 31, 2009
NIH/NCCIH
Effect of Vitamin B12 on the Human Circadian Pacemaker
Role: Principal Investigator

R01HL077453     (DUFFY, JEANNE F)Jul 15, 2004 - Jun 30, 2012
NIH/NHLBI
Adaptation of Circadian Responses to Light Treatment
Role: Principal Investigator

R03AG018578     (DUFFY, JEANNE F)Sep 30, 2000 - Sep 29, 2002
NIH/NIA
LIGHT, SLEEP TIMING AND CIRCADIAN PHASE IN OLDER PEOPLE
Role: Principal Investigator

Collapse Bibliographic 
Collapse selected publications
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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  1. Rachmin I, O'Meara CC, Ricci-Blair EM, Feng Y, Christensen EM, Duffy JF, Zitting KM, Czeisler CA, Pancoast JR, Cannon CP, O'Donoghue ML, Morrow DA, Lee RT. Soluble Interleukin-13ra1: A Circulating Regulator of Glucose. Am J Physiol Endocrinol Metab. 2017 Sep 05; ajpendo.00168.2017. PMID: 28874358.
    View in: PubMed
  2. Zhang Y, Duffy JF, De Castillero ER. Do sleep disturbances mediate the association between work-family conflict and depressive symptoms among nurses? A cross-sectional study. J Psychiatr Ment Health Nurs. 2017 Oct; 24(8):620-628. PMID: 28635074.
    View in: PubMed
  3. Rahman SA, St Hilaire MA, Chang AM, Santhi N, Duffy JF, Kronauer RE, Czeisler CA, Lockley SW, Klerman EB. Circadian phase resetting by a single short-duration light exposure. JCI Insight. 2017 Apr 06; 2(7):e89494. PMID: 28405608.
    View in: PubMed
  4. Walsh L, McLoone S, Ronda J, Duffy JF, Czeisler CA. Noncontact Pressure-Based Sleep/Wake Discrimination. IEEE Trans Biomed Eng. 2017 Aug; 64(8):1750-1760. PMID: 27845651.
    View in: PubMed
  5. Walsh L, McLoone S, Ronda J, Duffy JF, Czeisler CA. Non-contact Pressure-based Sleep/Wake Discrimination. IEEE Trans Biomed Eng. 2016 Oct 25. PMID: 28113254.
    View in: PubMed
  6. Chinoy ED, Harris MP, Kim MJ, Wang W, Duffy JF. Scheduled evening sleep and enhanced lighting improve adaptation to night shift work in older adults. Occup Environ Med. 2016 Dec; 73(12):869-876. PMID: 27566781.
    View in: PubMed
  7. Chang AM, Bjonnes AC, Aeschbach D, Buxton OM, Gooley JJ, Anderson C, Van Reen E, Cain SW, Czeisler CA, Duffy JF, Lockley SW, Shea SA, Scheer FA, Saxena R. Circadian gene variants influence sleep and the sleep electroencephalogram in humans. Chronobiol Int. 2016; 33(5):561-73. PMID: 27089043.
    View in: PubMed
  8. de la Iglesia HO, Moreno C, Lowden A, Louzada F, Marqueze E, Levandovski R, Pilz LK, Valeggia C, Fernandez-Duque E, Golombek DA, Czeisler CA, Skene DJ, Duffy JF, Roenneberg T. Ancestral sleep. Curr Biol. 2016 Apr 04; 26(7):R271-2. PMID: 27046809.
    View in: PubMed
  9. Lane JM, Chang AM, Bjonnes AC, Aeschbach D, Anderson C, Cade BE, Cain SW, Czeisler CA, Gharib SA, Gooley JJ, Gottlieb DJ, Grant SF, Klerman EB, Lauderdale DS, Lockley SW, Munch M, Patel S, Punjabi NM, Rajaratnam SM, Rueger M, St Hilaire MA, Santhi N, Scheuermaier K, Van Reen E, Zee PC, Shea SA, Duffy JF, Buxton OM, Redline S, Scheer FA, Saxena R. Impact of Common Diabetes Risk Variant in MTNR1B on Sleep, Circadian, and Melatonin Physiology. Diabetes. 2016 Jun; 65(6):1741-51. PMID: 26868293; PMCID: PMC4878414 [Available on 06/01/17].
  10. Duffy JF, Scheuermaier K, Loughlin KR. Age-Related Sleep Disruption and Reduction in the Circadian Rhythm of Urine Output: Contribution to Nocturia? Curr Aging Sci. 2016; 9(1):34-43. PMID: 26632430; PMCID: PMC4713267 [Available on 01/01/17].
  11. Maurer L, Zitting KM, Elliott K, Czeisler CA, Ronda JM, Duffy JF. A new face of sleep: The impact of post-learning sleep on recognition memory for face-name associations. Neurobiol Learn Mem. 2015 Dec; 126:31-8. PMID: 26549626; PMCID: PMC4666502 [Available on 12/01/16].
  12. Duffy JF, Zitting KM, Chinoy ED. Aging and Circadian Rhythms. Sleep Med Clin. 2015 Dec; 10(4):423-34. PMID: 26568120; PMCID: PMC4648699 [Available on 12/01/16].
  13. de la Iglesia HO, Fernández-Duque E, Golombek DA, Lanza N, Duffy JF, Czeisler CA, Valeggia CR. Access to Electric Light Is Associated with Shorter Sleep Duration in a Traditionally Hunter-Gatherer Community. J Biol Rhythms. 2015 Aug; 30(4):342-50. PMID: 26092820.
    View in: PubMed
  14. Duffy JF, Zitting KM, Czeisler CA. The Case for Addressing Operator Fatigue. Rev Hum Factors Ergon. 2015 Jun; 10(1):29-78. PMID: 26056516.
    View in: PubMed
  15. Chang AM, Aeschbach D, Duffy JF, Czeisler CA. Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proc Natl Acad Sci U S A. 2015 Jan 27; 112(4):1232-7. PMID: 25535358; PMCID: PMC4313820.
  16. Devore EE, Grodstein F, Duffy JF, Stampfer MJ, Czeisler CA, Schernhammer ES. Sleep duration in midlife and later life in relation to cognition. J Am Geriatr Soc. 2014 Jun; 62(6):1073-81. PMID: 24786726; PMCID: PMC4188530.
  17. Lee JH, Kim SJ, Lee SY, Jang KH, Kim IS, Duffy JF. Reliability and validity of the Korean version of Morningness-Eveningness Questionnaire in adults aged 20-39 years. Chronobiol Int. 2014 May; 31(4):479-86. PMID: 24467306; PMCID: PMC4031040.
  18. Kabrita CS, Hajjar-Muça TA, Duffy JF. Predictors of poor sleep quality among Lebanese university students: association between evening typology, lifestyle behaviors, and sleep habits. Nat Sci Sleep. 2014; 6:11-8. PMID: 24470782; PMCID: PMC3894960.
  19. Rovers J, Smits M, Duffy JF. Headache and sleep: also assess circadian rhythm sleep disorders. Headache. 2014 Jan; 54(1):175-7. PMID: 24400764.
    View in: PubMed
  20. Keijzer H, Smits MG, Duffy JF, Curfs LM. Why the dim light melatonin onset (DLMO) should be measured before treatment of patients with circadian rhythm sleep disorders. Sleep Med Rev. 2014 Aug; 18(4):333-9. PMID: 24388969.
    View in: PubMed
  21. Kim MJ, Lee JH, Duffy JF. Circadian Rhythm Sleep Disorders. J Clin Outcomes Manag. 2013 Nov 01; 20(11):513-528. PMID: 25368503.
    View in: PubMed
  22. Ramin C, Devore EE, Pierre-Paul J, Duffy JF, Hankinson SE, Schernhammer ES. Chronotype and breast cancer risk in a cohort of US nurses. Chronobiol Int. 2013 Nov; 30(9):1181-6. PMID: 23961712; PMCID: PMC4007068.
  23. Lim AS, Myers AJ, Yu L, Buchman AS, Duffy JF, De Jager PL, Bennett DA. Sex difference in daily rhythms of clock gene expression in the aged human cerebral cortex. J Biol Rhythms. 2013 Apr; 28(2):117-29. PMID: 23606611; PMCID: PMC3774838.
  24. Lim AS, Chang AM, Shulman JM, Raj T, Chibnik LB, Cain SW, Rothamel K, Benoist C, Myers AJ, Czeisler CA, Buchman AS, Bennett DA, Duffy JF, Saper CB, De Jager PL. A common polymorphism near PER1 and the timing of human behavioral rhythms. Ann Neurol. 2012 Sep; 72(3):324-34. PMID: 23034908; PMCID: PMC3464954.
  25. Pomplun M, Silva EJ, Ronda JM, Cain SW, Münch MY, Czeisler CA, Duffy JF. The effects of circadian phase, time awake, and imposed sleep restriction on performing complex visual tasks: evidence from comparative visual search. J Vis. 2012 Jul 26; 12(7). PMID: 22836655; PMCID: PMC4503214.
  26. Klerman EB, Wang W, Duffy JF, Dijk DJ, Czeisler CA, Kronauer RE. Survival analysis indicates that age-related decline in sleep continuity occurs exclusively during NREM sleep. Neurobiol Aging. 2013 Jan; 34(1):309-18. PMID: 22727943; PMCID: PMC3469724.
  27. Chang AM, Santhi N, St Hilaire M, Gronfier C, Bradstreet DS, Duffy JF, Lockley SW, Kronauer RE, Czeisler CA. Human responses to bright light of different durations. J Physiol. 2012 Jul 01; 590(13):3103-12. PMID: 22526883; PMCID: PMC3406393.
  28. Buxton OM, Cain SW, O'Connor SP, Porter JH, Duffy JF, Wang W, Czeisler CA, Shea SA. Adverse metabolic consequences in humans of prolonged sleep restriction combined with circadian disruption. Sci Transl Med. 2012 Apr 11; 4(129):129ra43. PMID: 22496545; PMCID: PMC3678519.
  29. Pullman RE, Roepke SE, Duffy JF. Laboratory validation of an in-home method for assessing circadian phase using dim light melatonin onset (DLMO). Sleep Med. 2012 Jun; 13(6):703-6. PMID: 22445311; PMCID: PMC3372704.
  30. Dijk DJ, Duffy JF, Silva EJ, Shanahan TL, Boivin DB, Czeisler CA. Amplitude reduction and phase shifts of melatonin, cortisol and other circadian rhythms after a gradual advance of sleep and light exposure in humans. PLoS One. 2012; 7(2):e30037. PMID: 22363414; PMCID: PMC3281823.
  31. Chang AM, Buch AM, Bradstreet DS, Klements DJ, Duffy JF. Human diurnal preference and circadian rhythmicity are not associated with the CLOCK 3111C/T gene polymorphism. J Biol Rhythms. 2011 Jun; 26(3):276-9. PMID: 21628555; PMCID: PMC3689429.
  32. Münch M, Scheuermaier KD, Zhang R, Dunne SP, Guzik AM, Silva EJ, Ronda JM, Duffy JF. Effects on subjective and objective alertness and sleep in response to evening light exposure in older subjects. Behav Brain Res. 2011 Oct 31; 224(2):272-8. PMID: 21664380; PMCID: PMC3169848.
  33. Duffy JF, Cain SW, Chang AM, Phillips AJ, Münch MY, Gronfier C, Wyatt JK, Dijk DJ, Wright KP, Czeisler CA. Sex difference in the near-24-hour intrinsic period of the human circadian timing system. Proc Natl Acad Sci U S A. 2011 Sep 13; 108 Suppl 3:15602-8. PMID: 21536890; PMCID: PMC3176605.
  34. Cain SW, Silva EJ, Chang AM, Ronda JM, Duffy JF. One night of sleep deprivation affects reaction time, but not interference or facilitation in a Stroop task. Brain Cogn. 2011 Jun; 76(1):37-42. PMID: 21477910; PMCID: PMC3310176.
  35. Scheuermaier K, Meyers M, Surprise M, Loughlin KR, Duffy JF. Reciprocal relationship between age-related sleep disruption and urological symptoms. BJU Int. 2011 Mar; 107(6):871-3. PMID: 21392205; PMCID: PMC3127240.
  36. Duffy JF, Lowe AS, Silva EJ, Winkelman JW. Periodic limb movements in sleep exhibit a circadian rhythm that is maximal in the late evening/early night. Sleep Med. 2011 Jan; 12(1):83-8. PMID: 21093364; PMCID: PMC3052966.
  37. Roepke SE, Duffy JF. Differential impact of chronotype on weekday and weekend sleep timing and duration. Nat Sci Sleep. 2010 Sep 01; 2010(2):213-220. PMID: 20890372.
    View in: PubMed
  38. Cain SW, Dennison CF, Zeitzer JM, Guzik AM, Khalsa SB, Santhi N, Schoen MW, Czeisler CA, Duffy JF. Sex differences in phase angle of entrainment and melatonin amplitude in humans. J Biol Rhythms. 2010 Aug; 25(4):288-96. PMID: 20679498; PMCID: PMC3792014.
  39. Silva EJ, Wang W, Ronda JM, Wyatt JK, Duffy JF. Circadian and wake-dependent influences on subjective sleepiness, cognitive throughput, and reaction time performance in older and young adults. Sleep. 2010 Apr; 33(4):481-90. PMID: 20394317; PMCID: PMC2849787.
  40. Scheuermaier K, Laffan AM, Duffy JF. Light exposure patterns in healthy older and young adults. J Biol Rhythms. 2010 Apr; 25(2):113-22. PMID: 20348462; PMCID: PMC2847788.
  41. Münch M, Silva EJ, Ronda JM, Czeisler CA, Duffy JF. EEG sleep spectra in older adults across all circadian phases during NREM sleep. Sleep. 2010 Mar; 33(3):389-401. PMID: 20337198; PMCID: PMC2831434.
  42. Lee JH, Wang W, Silva EJ, Chang AM, Scheuermaier KD, Cain SW, Duffy JF. Neurobehavioral performance in young adults living on a 28-h day for 6 weeks. Sleep. 2009 Jul; 32(7):905-13. PMID: 19639753; PMCID: PMC2706904.
  43. O'Donnell D, Silva EJ, Münch M, Ronda JM, Wang W, Duffy JF. Comparison of subjective and objective assessments of sleep in healthy older subjects without sleep complaints. J Sleep Res. 2009 Jun; 18(2):254-63. PMID: 19645969; PMCID: PMC2975570.
  44. Duffy JF, Czeisler CA. Effect of Light on Human Circadian Physiology. Sleep Med Clin. 2009 Jun; 4(2):165-177. PMID: 20161220.
    View in: PubMed
  45. Duffy JF, Willson HJ, Wang W, Czeisler CA. Healthy older adults better tolerate sleep deprivation than young adults. J Am Geriatr Soc. 2009 Jul; 57(7):1245-51. PMID: 19460089; PMCID: PMC3122254.
  46. Silva EJ, Duffy JF. Sleep inertia varies with circadian phase and sleep stage in older adults. Behav Neurosci. 2008 Aug; 122(4):928-35. PMID: 18729646.
    View in: PubMed
  47. Pavlova MK, Duffy JF, Shea SA. Polysomnographic respiratory abnormalities in asymptomatic individuals. Sleep. 2008 Feb; 31(2):241-8. PMID: 18274272; PMCID: PMC2225571.
  48. Cain SW, Rimmer DW, Duffy JF, Czeisler CA. Exercise distributed across day and night does not alter circadian period in humans. J Biol Rhythms. 2007 Dec; 22(6):534-41. PMID: 18057328.
    View in: PubMed
  49. Santhi N, Horowitz TS, Duffy JF, Czeisler CA. Acute sleep deprivation and circadian misalignment associated with transition onto the first night of work impairs visual selective attention. PLoS One. 2007 Nov 28; 2(11):e1233. PMID: 18043740; PMCID: PMC2077929.
  50. Zeitzer JM, Duffy JF, Lockley SW, Dijk DJ, Czeisler CA. Plasma melatonin rhythms in young and older humans during sleep, sleep deprivation, and wake. Sleep. 2007 Nov; 30(11):1437-43. PMID: 18041478; PMCID: PMC2082092.
  51. Willson HJ, Ellis J, Guzik AM, Czeisler CA, Duffy JF. Healthy older adults have fewer attentional failures than young adults during extended wakefulness. Sleep. 2007; 30:in press.
  52. Scheuermaier K, Guzik AM, Row J, Munch M, Loughlin KR, Duffy JF. Urinary symptoms are related with sleep complaints and daytime sleepiness in healthy older people. Sleep. 2007; 30:in press.
  53. Silva EJ, Czeisler CA, Duffy JF. Effects of sleep inertia on subjective sleepiness and performance in older subjects. Sleep. 2007; 30:in press.
  54. Cain SW, Duffy JF, Czeisler CA. Exercise distributed across day and night does not alter circadian period. Sleep. 2007; 30:in press.
  55. Münch MY, Cain SW, Duffy JF. Biological Rhythms Workshop IC: sleep and rhythms. Cold Spring Harb Symp Quant Biol. 2007; 72:35-46. PMID: 18419261.
    View in: PubMed
  56. Kuhlman SJ, Mackey SR, Duffy JF. Biological Rhythms Workshop I: introduction to chronobiology. Cold Spring Harb Symp Quant Biol. 2007; 72:1-6. PMID: 18419258.
    View in: PubMed
  57. Duffy JF, Zeitzer JM, Czeisler CA. Decreased sensitivity to phase-delaying effects of moderate intensity light in older subjects. Neurobiol Aging. 2007 May; 28(5):799-807. PMID: 16621166; PMCID: PMC1855248.
  58. Scheuermaier K, Laffan AM, Duffy JF. Light exposure patterns in healthy older people living in New England, USA. J Sleep Res. 2006; 15:94.
  59. Santhi N, Duffy JF, Gronfier C, Lockley SW, Czeisler CA. Moderate intensity room light can entrain the circadian pacemaker to a non-24-h day. J Sleep Res. 2006; 15:54.
  60. Hares J, Nguyen VT, Wright Jr. KP, Czeisler CA, Loughlin KR, Duffy JF. Age-related difference in circadian rhythm of urine output under constant conditions. J Sleep Res. 2006; 15:182-183.
  61. Duffy JF. Increased sleep disruption, reduced sleepiness in older subjects? Sleep. 2005 Nov; 28(11):1358-9. PMID: 16335324.
    View in: PubMed
  62. Santhi N, Duffy JF, Horowitz TS, Czeisler CA. Scheduling of sleep/darkness affects the circadian phase of night shift workers. Neurosci Lett. 2005 Aug 26; 384(3):316-20. PMID: 15919151.
    View in: PubMed
  63. Duffy JF, Wright KP. Entrainment of the human circadian system by light. J Biol Rhythms. 2005 Aug; 20(4):326-38. PMID: 16077152.
    View in: PubMed
  64. Zeitzer JM, Khalsa SB, Boivin DB, Duffy JF, Shanahan TL, Kronauer RE, Czeisler CA. Temporal dynamics of late-night photic stimulation of the human circadian timing system. Am J Physiol Regul Integr Comp Physiol. 2005 Sep; 289(3):R839-44. PMID: 15890792.
    View in: PubMed
  65. Wright KP, Gronfier C, Duffy JF, Czeisler CA. Intrinsic period and light intensity determine the phase relationship between melatonin and sleep in humans. J Biol Rhythms. 2005 Apr; 20(2):168-77. PMID: 15834113; PMCID: PMC2714089.
  66. Duffy JF, Lowe ASW, Winkelman JW, Czeisler CA. Peak circadian occurrence of PLMS during the biological nighttime. Sleep. 2005; 28:A275.
  67. Klerman EB, Davis JB, Duffy JF, Dijk DJ, Kronauer RE. Older people awaken more frequently but fall back asleep at the same rate as younger people. Sleep. 2004 Jun 15; 27(4):793-8. PMID: 15283016.
    View in: PubMed
  68. Duffy JF. Shift work and aging: Roles of sleep and circadian rhythms. Clinics in Occupational and Environmental Medicine. 2003; 3:311-332.
  69. Klerman EB, Gershengorn HB, Duffy JF, Kronauer RE. Comparisons of the variability of three markers of the human circadian pacemaker. J Biol Rhythms. 2002 Apr; 17(2):181-93. PMID: 12002165.
    View in: PubMed
  70. Khalsa SB, Conroy DA, Duffy JF, Czeisler CA, Dijk DJ. Sleep- and circadian-dependent modulation of REM density. J Sleep Res. 2002 Mar; 11(1):53-9. PMID: 11869427.
    View in: PubMed
  71. Duffy JF, Zeitzer JM, Rimmer DW, Klerman EB, Dijk DJ, Czeisler CA. Peak of circadian melatonin rhythm occurs later within the sleep of older subjects. Am J Physiol Endocrinol Metab. 2002 Feb; 282(2):E297-303. PMID: 11788360.
    View in: PubMed
  72. Duffy JF, Dijk DJ. Getting through to circadian oscillators: why use constant routines? J Biol Rhythms. 2002 Feb; 17(1):4-13. PMID: 11837947.
    View in: PubMed
  73. Duffy JF, Czeisler CA. Age-related change in the relationship between circadian period, circadian phase, and diurnal preference in humans. Neurosci Lett. 2002 Feb 01; 318(3):117-20. PMID: 11803113.
    View in: PubMed
  74. Duffy JF, Czeisler CA. Circadian rhythms. Ekerdt DJ, editors. Macmillan Encyclopedia of Aging. 2002.
  75. Grundleger CS, Rogacz S, Duffy JF. Circadian rhythms of core body temperature and plasma cortisol in anovulatory women. Sleep. 2002; 25:A309-310.
  76. Dijk DJ, Duffy JF, Czeisler CA. Age-related increase in awakenings: impaired consolidation of nonREM sleep at all circadian phases. Sleep. 2001 Aug 01; 24(5):565-77. PMID: 11480654.
    View in: PubMed
  77. Duffy JF, Rimmer DW, Czeisler CA. Association of intrinsic circadian period with morningness-eveningness, usual wake time, and circadian phase. Behav Neurosci. 2001 Aug; 115(4):895-9. PMID: 11508728.
    View in: PubMed
  78. Klerman EB, Zeitzer JM, Duffy JF, Khalsa SB, Czeisler CA. Absence of an increase in the duration of the circadian melatonin secretory episode in totally blind human subjects. J Clin Endocrinol Metab. 2001 Jul; 86(7):3166-70. PMID: 11443183.
    View in: PubMed
  79. Klerman EB, Duffy JF, Dijk DJ, Czeisler CA. Circadian phase resetting in older people by ocular bright light exposure. J Investig Med. 2001 Jan; 49(1):30-40. PMID: 11217145.
    View in: PubMed
  80. Jewett ME, Duffy JF, Czeisler CA. The timing of the human circadian clock is accurately represented by the core body temperature rhythm following phase shifts to a three-cycle light stimulus near the critical zone. J Biol Rhythms. 2000 Dec; 15(6):524-30. PMID: 11106069.
    View in: PubMed
  81. Rimmer DW, Boivin DB, Shanahan TL, Kronauer RE, Duffy JF, Czeisler CA. Dynamic resetting of the human circadian pacemaker by intermittent bright light. Am J Physiol Regul Integr Comp Physiol. 2000 Nov; 279(5):R1574-9. PMID: 11049838.
    View in: PubMed
  82. Czeisler CA, Dijk DJ, Kronauer RE, Brown EN, Duffy JF, Allan JS, Shanahan TL, Rimmer DW, Ronda JM, Mitchell JF, Silva EJ, Emens JS. Is there an intrinsic period of the circadian clock? Response. Science. 2000 May 19; 288(5469):1174-5. PMID: 11536927.
    View in: PubMed
  83. Dijk DJ, Duffy JF, Czeisler CA. Contribution of circadian physiology and sleep homeostasis to age-related changes in human sleep. Chronobiol Int. 2000 May; 17(3):285-311. PMID: 10841208.
    View in: PubMed
  84. Duffy JF. The early bird vs. the night owl. Do differences in circadian timing define our sleep preferences?. ADVANCE for Managers of Respiratory Care. 2000; 9:10-11.
  85. Zeitzer JM, Daniels JE, Duffy JF, Klerman EB, Shanahan TL, Dijk DJ, Czeisler CA. Do plasma melatonin concentrations decline with age? Am J Med. 1999 Nov; 107(5):432-6. PMID: 10569297.
    View in: PubMed
  86. Duffy JF, Viswanathan N, Davis FC. Free-running circadian period does not shorten with age in female Syrian hamsters. Neurosci Lett. 1999 Aug 20; 271(2):77-80. PMID: 10477106.
    View in: PubMed
  87. Czeisler CA, Duffy JF, Shanahan TL, Brown EN, Mitchell JF, Rimmer DW, Ronda JM, Silva EJ, Allan JS, Emens JS, Dijk DJ, Kronauer RE. Stability, precision, and near-24-hour period of the human circadian pacemaker. Science. 1999 Jun 25; 284(5423):2177-81. PMID: 10381883.
    View in: PubMed
  88. Shanahan TL, Kronauer RE, Duffy JF, Williams GH, Czeisler CA. Melatonin rhythm observed throughout a three-cycle bright-light stimulus designed to reset the human circadian pacemaker. J Biol Rhythms. 1999 Jun; 14(3):237-53. PMID: 10452336.
    View in: PubMed
  89. Dijk DJ, Duffy JF, Riel E, Shanahan TL, Czeisler CA. Ageing and the circadian and homeostatic regulation of human sleep during forced desynchrony of rest, melatonin and temperature rhythms. J Physiol. 1999 Apr 15; 516 ( Pt 2):611-27. PMID: 10087357; PMCID: PMC2269279.
  90. Dijk DJ, Duffy JF. Circadian regulation of human sleep and age-related changes in its timing, consolidation and EEG characteristics. Ann Med. 1999 Apr; 31(2):130-40. PMID: 10344586.
    View in: PubMed
  91. Duffy JF, Dijk DJ, Hall EF, Czeisler CA. Relationship of endogenous circadian melatonin and temperature rhythms to self-reported preference for morning or evening activity in young and older people. J Investig Med. 1999 Mar; 47(3):141-50. PMID: 10198570.
    View in: PubMed
  92. Duffy JF, Dijk DJ, Klerman EB, Czeisler CA. Later endogenous circadian temperature nadir relative to an earlier wake time in older people. Am J Physiol. 1998 Nov; 275(5 Pt 2):R1478-87. PMID: 9791064.
    View in: PubMed
  93. Duffy JF. Age-related changes in circadian rhythms in the Syrian hamster (Mesocricetus auratus) and the human. 1998.
  94. Dijk DJ, Shanahan TL, Duffy JF, Ronda JM, Czeisler CA. Variation of electroencephalographic activity during non-rapid eye movement and rapid eye movement sleep with phase of circadian melatonin rhythm in humans. J Physiol. 1997 Dec 15; 505 ( Pt 3):851-8. PMID: 9457658; PMCID: PMC1160058.
  95. Jewett ME, Rimmer DW, Duffy JF, Klerman EB, Kronauer RE, Czeisler CA. Human circadian pacemaker is sensitive to light throughout subjective day without evidence of transients. Am J Physiol. 1997 Nov; 273(5 Pt 2):R1800-9. PMID: 9374826.
    View in: PubMed
  96. Boivin DB, Czeisler CA, Dijk DJ, Duffy JF, Folkard S, Minors DS, Totterdell P, Waterhouse JM. Complex interaction of the sleep-wake cycle and circadian phase modulates mood in healthy subjects. Arch Gen Psychiatry. 1997 Feb; 54(2):145-52. PMID: 9040282.
    View in: PubMed
  97. Duffy JF, Kronauer RE, Czeisler CA. Phase-shifting human circadian rhythms: influence of sleep timing, social contact and light exposure. J Physiol. 1996 Aug 15; 495 ( Pt 1):289-97. PMID: 8866371; PMCID: PMC1160744.
  98. Waldstreicher J, Duffy JF, Brown EN, Rogacz S, Allan JS, Czeisler CA. Gender differences in the temporal organization of proclactin (PRL) secretion: evidence for a sleep-independent circadian rhythm of circulating PRL levels- a clinical research center study. J Clin Endocrinol Metab. 1996 Apr; 81(4):1483-7. PMID: 8636355.
    View in: PubMed
  99. Boivin DB, Duffy JF, Kronauer RE, Czeisler CA. Dose-response relationships for resetting of human circadian clock by light. Nature. 1996 Feb 08; 379(6565):540-2. PMID: 8596632.
    View in: PubMed
  100. Boivin DB, Duffy JF, Kronauer RE, Czeisler CA. Sensitivity of the human circadian pacemaker to moderately bright light. J Biol Rhythms. 1994; 9(3-4):315-31. PMID: 7772798.
    View in: PubMed
  101. Czeisler CA, Dijk DJ, Duffy JF. Entrained phase of the circadian pacemaker serves to stabilize alertness and performance throughout the habitual waking day. Ogilvie RD, Harsh JR, editors. Sleep Onset. Normal and Abnormal Processes. 1994; 134-136.
  102. Duffy JF, Czeisler CA. Assessment of endogenous circadian period in an individual whose temperature phase is delayed with respect to his habitual sleep-wake schedule. J Sleep Res. 1994; 23:490.
  103. Duffy JF. Constant routine. Carskadon M, Rechtschaffen A, Richardson G, Roth T, Siegel J, editors. Encyclopedia of Sleep and Dreaming. 1993; 134-136.
  104. Czeisler CA, Dumont M, Duffy JF, Steinberg JD, Richardson GS, Brown EN, Sánchez R, Ríos CD, Ronda JM. Association of sleep-wake habits in older people with changes in output of circadian pacemaker. Lancet. 1992 Oct 17; 340(8825):933-6. PMID: 1357348.
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  105. Dijk DJ, Duffy JF, Czeisler CA. Circadian and sleep/wake dependent aspects of subjective alertness and cognitive performance. J Sleep Res. 1992 Jun; 1(2):112-7. PMID: 10607036.
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  106. Johnson MP, Duffy JF, Dijk DJ, Ronda JM, Dyal CM, Czeisler CA. Short-term memory, alertness and performance: a reappraisal of their relationship to body temperature. J Sleep Res. 1992 Mar; 1(1):24-9. PMID: 10607021.
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  107. Czeisler CA, Chiasera AJ, Duffy JF. Research on sleep, circadian rhythms and aging: applications to manned spaceflight. Exp Gerontol. 1991; 26(2-3):217-32. PMID: 1915692.
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  108. Czeisler CA, Johnson MP, Duffy JF, Brown EN, Ronda JM, Kronauer RE. Exposure to bright light and darkness to treat physiologic maladaptation to night work. N Engl J Med. 1990 May 03; 322(18):1253-9. PMID: 2325721.
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  109. Czeisler CA, Rogacz S, Duffy JF. Reproductive function in women: Circadian interaction. Naftolin F, Gurmann JN, DeCheney AH, Sarrel PM, editors. Cardiovascular and Neurologic Function and Ovarian Secretions. 1990; 239-247.
  110. Czeisler CA, Duffy JF, Kronauer RE. Treatment of physiologic maladaptation to night work. Response. N Engl J Med. 1990; 323:918-919.
  111. Duffy JF, Shanahan TL, Czeisler CA. Phase-shifting effect of indirect (ceiling-mounted) bright light exposure on the human circadian pacemaker. Abstracts, 2nd Meeting of the Society for Research on Biological Rhythms. 1990; 38.
  112. Czeisler CA, Kronauer RE, Allan JS, Duffy JF, Jewett ME, Brown EN, Ronda JM. Bright light induction of strong (type 0) resetting of the human circadian pacemaker. Science. 1989 Jun 16; 244(4910):1328-33. PMID: 2734611.
    View in: PubMed
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