Faculty Profile

Jeanne F. Duffy, MBA, PhD

Jeanne F. Duffy, MBA, PhD
Associate Professor of Medicine, Harvard Medical School
Neuroscientist, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital

See publications


221 Longwood Avenue, BLI - 438
Boston, MA 02115

Inter-office Mail Address

BWH Division of Sleep Medicine, BLI438

Phone 617-732-7995
Fax 617-732-4015

Email jduffy@hms.harvard.edu

Society Memberships

Society for Neuroscience
Society for Research on Biological Rhythms
European Sleep Research Society
Sleep Research Society
Sleep Research Network

Research Unit(s)

Division of Sleep Medicine, Brigham and Women's Hospital
Chronobiology Core, Division of Sleep Medicine, Brigham and Women's Hospital

Research Interests

My research interests include both basic and applied aspects of sleep research and circadian physiology. My recent work has focused on understanding individual differences in sleep timing, duration, need, and response to acute and chronic sleep loss. My group has examined how different aspects of cognitive performance respond to sleep loss, and how those responses differ between groups. Our other work has focused on how features of circadian physiology differ between individuals and groups, and how those circadian rhythm differences contribute to individual differences in sleep. 

In addition to those areas described above, my research interests include understanding the underlying factors contributing to circadian rhythm sleep disorders such as shift-work dyssomnia, advanced and delayed sleep phase syndromes and jet lag, and pursuing novel treatments for those disorders.


Jason Rodriguez, 2001
Marie Cadet, 2001
Alison M. Laffan, 2001-2002
Alex S.W. Lowe, 2003-2004
Hannah Willson, 2005-2007
John Hares, 2005-2006
Stephanie Romiszewsk, 2005-2007
Fanuel Muindi, 2007
Rachel Zhang, 2007-2009
Kieran Elliott 2010- 2012
Jarrett Bruno 2010- 2012

Medical Students:
Rashad J. Harris, 2005
Van T. Nguyen, 2005

Graduate Students:
Seán P. Dunne, 2009-2010
Rebecca E. Pullman 2008-2011
Lorcan C. Walsh 2011-2012
Hong Chai (Brian) Park 2012-2013

Post-doctoral Fellows:
Nayantara Santhi, PhD, 2002-2005
Karine D. Scheuermaier, MD, 2006-2010
Mirjam Y. Münch, PhD, 2006-2009
Sean W. Cain, PhD, 2006-2009
Anne-Marie Chang, PhD, 2003-2011
Joseph T. Hull, PhD, 2010

Other Trainees:
Deirdre O’Donnell, 2007-2008
Darren W. Kearney, 2008-2009
Stephanie E. Roepke, 2008-2010
Alison M. Buch, 2009-2010
Rebecca Pullman, 2008-2011

Research Funding

Efficacy of Melatonin Treatment in a Phase Advance Model of Insomnia
PI: Charles A. Czeisler, PhD, MD.
The goal of this project is to test the chronobiotic and sleep promoting effects of melatonin in a phase advance model of insomnia.

Sensitization of Circadian Responses to Light
PI: Charles A. Czeisler, PhD, MD.
The goal of this project is to study the dynamics of dim light sensitization on circadian responses to subsequent exposure to light, by testing four different durations of dim light sensitization.  

BRI Fund to Sustain Research Excellence PI: Jeanne F. Duffy, MBA, PhD.
William F. Milton Fund
Understanding Drowsy-Driving Motor Vehicle Crashes Using hdEEG
PI: Jeanne F. Duffy, MBA, PhD.
This study is designed to understand what occurs physiologically during drowsy driving, to test whether drowsy drivers exhibit “local sleep”, and to test whether local sleep is associated with adverse driving events.

Treatment of Circadian Disruption from Shiftwork in Older Adults
Disrupted Sleep in the Elderly: Circadian Etiology
PI: Jeanne F. Duffy, MBA, PhD.
The goal of this project is to test in older workers a sleep timing and enhanced lighting regimen that has been successful in allowing young workers to maintain optimal performance at night.

NIH/NIA Program Project
Sleep Aging and Circadian Rhythm Disorders
PI:  Charles A. Czeisler, PhD, MD.
The goals of the Program Project are to understand how older people respond to chronic circadian disruption vs. chronic sleep restriction. The program will investigate changes in sleep, waking neurobehavioral performance, and metabolism, at the behavioral and electrophysical levels as well as at the neuro-anatomical level.

Training in sleep, circadian and respiratory neurobiology
PI: Charles A. Czeisler, PhD.
The goal of this institutional training program is to provide a structured, comprehensive program to train outstanding individuals for academic positions in the broad field of sleep disorders medicine with specific expertise in basic science, patient-oriented or applied research.
Role: Faculty Preceptor


HMS Explorations for Middle School Students Program, Laboratory Host
HMS Division of Sleep Medicine Institutional NRSA "Sleep, Aging and Circadian Rhythm Disorders", Preceptor
HMS Division on Aging Geriatric Psychiatry Seminars, Lecturer

Selected Publications

Ramin C, Devore E, Pierre-Paul J, Duffy JF, Hankinson SE, Schernhammer ES. Chronotype and breast cancer risk in a cohort of U.S. nurses.
Chronobiology International 2013; in press.

Lee JH, Kim SJ, Kim IS, Jang KH, Duffy JF. Self-reported sleep duration, daytime sleepiness, and caffeine use in male and female morning and evening types.
Sleep Medicine Research 2013; in press.

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. Journal of Biological Rhythms 2013; 28(2):117-29.

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]

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]

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]

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]

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 1;590(Pt 13):3103-12. [PMID: 22526883]

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]

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]

Lee JH, Kim IS, Kim SJ, Wang W, Duffy JF.  Change in individual chronotype over a lifetime: A retrospective study. 
Sleep Medicine Research 2011; 2:48-53.

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; 2011;224:272-278. [PMID: 21664380]

Lee JH, Kim IS, Kim SJ, Wang W, Duffy JF.  Change in individual chronotype over a lifetime: A retrospective study. 
Sleep Med Res. 2011; 2:48-53.

Duffy JF, Cain SW, Chang A-M, Phillips AJK, Munch MY, Gronfier C, Wyatt JK, Dijk D-J, Wright Jr, KP, Czeisler, CA.  Sex difference in the near-24-hour intrinsic period of the human circadian timing system. 
Proc Natl Acad Sci USA. 2011; 108 Suppl 3:15602-15608. [PMID: 21536890]

Cain SW, Silva EJ, Chang A-M, Ronda JM, Duffy JF. One night of sleep deprivation affects reaction time, but not interference or facilitation in a Stroop task. 
Brain Cog. 2011;  76:37-42. [PMID: 21477910]

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]

Chang AM, Buch AM, Bradstreet DE, Klements DJ, Duffy JF.  Human diurnal preference and circadian rhythmicity are not associated with the Clock 3111T/C gene polymorphism. 
J Biol Rhythms. 2011 Jun;26(3):276-9. [PMID: 21628555]

Cain SW, Dennison C, Zeitzer JM, Guzik AM, Khalsa SBS, 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]

Roepke S, Duffy JF.  Differential impact of chronotype on weekday and weekend sleep timing and duration. 
Nat Sci Sleep. 2010 Sep 1;2010(2):213-220. [PMID: 20890372]

Duffy JF, Lowe ASW, Silva EJ, Winkelman JW.  Periodic limb movements of sleep exhibit a circadian rhythm that is maximal in the late evening / early night.  Sleep Med 2011 Jan;12(1):83-8. Epub 2010 Nov 18. [PMID: 21093364]

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 1;33(4):481-90. [PMID: 20394317]

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 1;33(3):389-401. [PMID: 20337198]

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]

Duffy JF, Czeisler CA.  Effect of light on human circadian physiology. 
Sleep Med Clin. 2009; 4:165-177. [PMID: 20161220]

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 ;32:905-13. [PMID: 19639753]

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;18:254-63. [PMID: 19645969]

Duffy JF, Willson HJ, Wang W, Czeisler CA. Healthy older adults better tolerate sleep deprivation than young adults.
J Am Geriatr Soc. 2009l;57:1245-51. Epub 2009 Apr 30. [PMID: 19460089]

Silva EJ, Duffy JF. Sleep inertia varies with circadian phase and sleep stage in older adults.
Behav Neurosci. 2008;122:928-35. [PMID: 18729646]

Pavlova MK, Duffy JF, Shea SA.
Polysomnographic respiratory abnormalities in asymptomatic individuals.
Sleep. 2008;31:241-8. [PMID: 18274272]

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]

Münch MY, Cain SW, Duffy JF. Biological Rhythms Workshop IC: sleep and
Cold Spring Harb Symp Quant Biol. 2007;72:35-46. [PMID: 18419261]

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. Epub 2006 Apr 18. [PMID: 16621166]

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].

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]

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; 30:1437-1443. [PMID: [18041478]

Duffy JF. Increased sleep disruption, reduced sleepiness in older subjects? Commentary on Circadian patterns of sleep, sleepiness, and performance in older and younger adults.
Sleep. 2005 Nov 1;28(11):1358-9. [PMID: 16335324]

Zeitzer JM, Khalsa SBS, Boivin DB, Duffy JF, et al.  Temporal dynamics of late night photic stimulation of the human circadian timing system. 
Am J Physiol 2005; 289:R839-R844. [PMID: 15890792]

Santhi N, Duffy JF, 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]

Wright Jr. 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; 20:168-177. [PMID: 15834113]

Duffy JF, Wright KP Jr. Entrainment of human circadian rhythms by light.
J Biol Rhythms. 2005 Aug;20(4):326-38. [PMID: 16077152]

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; 27:793-798. [PMID: 15283016]

Duffy JF. Shift work and aging: Roles of sleep and circadian rhythms.
Clinics in Occupational and Environmental Medicine. 2003; 3:311-332.

Klerman EB, Gershengorn HB, Duffy JF, Kronauer RE.  Comparisons of the variability of three markers of the human circadian pacemaker. 
J Biol Rhythms 2002; 17:181-193. [PMID: 12002165]

Duffy JF, Dijk DJ. Getting through to circadian oscillators: Why use constant routines?
J Biol Rhythms. 2002 Feb;17(1):4-13. [PMID: 11837947]

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]

Khalsa SBS, Conroy DA, Duffy JF, Czeisler CA, Dijk DJ.  Sleep and circadian-dependent modulation of REM density. 
J Sleep Res. 2002; 11:53-59. PMID: [11869427]

Duffy JF, Czeisler CA. Age-related change in the relationship between circadian period, circadian phase, and diurnal preference in humans.
Neurosci Lett. 2002 Feb 1;318(3):117-20. [PMID: 11803113]

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]

Dijk DJ, Duffy JF, Czeisler CA. Age-related increase in awakenings: impaired consolidation of nonREM sleep at all circadian phases.
Sleep. 2001 Aug 1;24(5):565-77. [PMID: 11480654]

Klerman EB, Zeitzer JM, Duffy JF, et al.  Absence of an increase in the duration of the circadian melatonin secretory episode in totally blind human subjects. 
J Clin Endocrinol Metab 2001; 86:3166-3170. [PMID: 11443183]

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]

Khalsa SBS, 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; 15:524-530. [PMID: 11106069]

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. 2000; 279:R1574-R1579. [PMID: 11049838]

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]

Duffy JF, Viswanathan N, Davis FC.  Free-running circadian period does not shorten with age in female Syrian hamsters. 
Neurosci Lett. 1999; 271:77-80. [PMID: 10477106]

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]

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]

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]

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]

Boivin DB, Duffy JF, Kronauer RE, Czeisler CA. Dose-response relationships for resetting of human circadian clock by light.
Nature. 1996 Feb 8;379(6565):540-2. [PMID: 8596632]

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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