Division of Sleep Medicine @ Harvard Medical School
Faculty Profile
Shantha M. W. Rajaratnam, PhD
Lecturer in Medicine (Academic, Part-time), Harvard Medical School
Associate Neuroscientist, Division of Sleep Medicine, Department of Medicine, Brigham and Women's Hospital
Other Affiliation(s)
School of Psychology, Psychiatry and Psychological Medicine, Monash University, Australia
Address
Division of Sleep Medicine, Brigham and Women's Hospital221 Longwood Avenue, BLI-438
Boston, MA 02115
USA
Inter-office Mail Address
BWH Division of Sleep Medicine, BLI-438Phone 617-732-4013
Fax 617-732-4015
Email swrajaratnam@rics.bwh.harvard.edu
Society Memberships
Associate Fellow and Chartered Psychologist, British Psychological SocietyRegistered Psychologist, Psychologists Registration Board of Victoria (Australia)
Sleep Research Society
Society for Research on Biological Rhythms
Australian and New Zealand Association of Psychology, Psychiatry and Law
Research Unit(s)
Division of Sleep Medicine, Brigham and Women's Hospital
Harvard Work Hours, Health and Safety Group, Harvard Medical School
Harvard Work Hours, Health and Safety Group, Harvard Medical School
Research Interests
Research interests include the role of melatonin in circadian sleep-wake regulation, effects of sleep loss on performance and cognition, shift work, alerting effects of light, legal issues relating to sleepiness and work hours.
Selected Publications
Swann CE, Yelland GW, Redman JR, Rajaratnam SM. Chronic partial sleep loss increases the facilitatory role of a masked prime in a word recognition task.
J Sleep Res. 2006 Mar: 15(1):23-9. [PMID: 16489999]
Parcell DL, Ponsford JL, Rajaratnam SM, Redman JR. Self-reported changes to nighttime sleep after traumatic brain injury.
Arch Phys Med Rehabil. 2006 Feb; 87(2):278-85. [PMID: 16442985]
Steele DL, Rajaratnam SM, Redman JR, Ponsford JL. The effect of traumatic brain injury on the timing of sleep.
Chronobiol Int. 2005; 22(1):89-105. [PMID: 15865324]
Jones CB, Dorrian J, Rajaratnam SM. Fatigue and the criminal law.
Ind Health. 2005 Jan; 43(1):63-70. Review. [PMID: 15732306]
Rajaratnam SM, Jones CB. Lessons about sleepiness and driving from the Selby rail disaster case: R v Gary Neil Hart.
Chronobiol Int. 2004; 21(6):1073-7. [PMID: 15646252]
Lenne MG, Dwyer F, Triggs TJ, Rajaratnam S, Redman JR. The effects of a nap opportunity in quiet and noisy environments on driving performance.
Chronobiol Int. 2004; 21(6):991-1001. [PMID: 15646244]
Rajaratnam SM, Middleton B, Stone BM, Arendt J, Dijk DJ. Melatonin advances the circadian timing of EEG sleep and directly facilitates sleep without altering its duration in extended sleep opportunities in humans.
J Physiol. 2004 Nov 15;561(Pt 1):339-51. Epub 2004 Sep 30. [PMID: 15459246]
Phipps-Nelson J, Redman JR, Dijk DJ, Rajaratnam SM. Daytime exposure to bright light, as compared to dim light, decreases sleepiness and improves psychomotor vigilance performance.
Sleep. 2003 Sep;26(6):695-700. [PMID: 14572122]
Rajaratnam SM. Legal issues in accidents caused by sleepiness.
J Hum Ergol (Tokyo). 2001 Dec;30(1-2):107-11. [PMID: 14564867]
Rajaratnam SM, Dijk DJ, Middleton B, Stone BM, Arendt J. Melatonin phase-shifts human circadian rhythms with no evidence of changes in the duration of endogenous melatonin secretion or the 24-hour production of reproductive hormones.
J Clin Endocrinol Metab. 2003 Sep;88(9):4303-9. Erratum in: J Clin Endocrinol Metab. 2004 Jun; 89(6):2997. [PMID: 12970302]
Rajaratnam SM, Arendt J. Health in a 24-h society.
Lancet. 2001 Sep 22; 358(9286):999-1005. Review. [PMID: 11583769]
Rajaratnam SM, Redman JR. Circadian locomotor activity rhythms of the diurnal Indian palm squirrel in constant light.
Chronobiol Int. 2001 Jan; 18(1):47-60. [PMID: 11247113]
Rajaratnam SM, Redman JR. Social contact synchronizes free-running activity rhythms of diurnal palm squirrels.
Physiol Behav. 1999 Mar; 66(1):21-6. [PMID: 10222468]
Rajaratnam SM, Redman JR. Entrainment of activity rhythms to temperature cycles in diurnal palm squirrels.
Physiol Behav. 1998 Jan;63(2):271-7. [PMID: 9423969]
Rajaratnam SM, Redman JR. Effects of daily melatonin administration on circadian activity rhythms in the diurnal Indian palm squirrel (Funambulus pennanti).
J Biol Rhythms. 1997 Aug;12(4):339-47. [PMID: 9438882]
J Sleep Res. 2006 Mar: 15(1):23-9. [PMID: 16489999]
Parcell DL, Ponsford JL, Rajaratnam SM, Redman JR. Self-reported changes to nighttime sleep after traumatic brain injury.
Arch Phys Med Rehabil. 2006 Feb; 87(2):278-85. [PMID: 16442985]
Steele DL, Rajaratnam SM, Redman JR, Ponsford JL. The effect of traumatic brain injury on the timing of sleep.
Chronobiol Int. 2005; 22(1):89-105. [PMID: 15865324]
Jones CB, Dorrian J, Rajaratnam SM. Fatigue and the criminal law.
Ind Health. 2005 Jan; 43(1):63-70. Review. [PMID: 15732306]
Rajaratnam SM, Jones CB. Lessons about sleepiness and driving from the Selby rail disaster case: R v Gary Neil Hart.
Chronobiol Int. 2004; 21(6):1073-7. [PMID: 15646252]
Lenne MG, Dwyer F, Triggs TJ, Rajaratnam S, Redman JR. The effects of a nap opportunity in quiet and noisy environments on driving performance.
Chronobiol Int. 2004; 21(6):991-1001. [PMID: 15646244]
Rajaratnam SM, Middleton B, Stone BM, Arendt J, Dijk DJ. Melatonin advances the circadian timing of EEG sleep and directly facilitates sleep without altering its duration in extended sleep opportunities in humans.
J Physiol. 2004 Nov 15;561(Pt 1):339-51. Epub 2004 Sep 30. [PMID: 15459246]
Phipps-Nelson J, Redman JR, Dijk DJ, Rajaratnam SM. Daytime exposure to bright light, as compared to dim light, decreases sleepiness and improves psychomotor vigilance performance.
Sleep. 2003 Sep;26(6):695-700. [PMID: 14572122]
Rajaratnam SM. Legal issues in accidents caused by sleepiness.
J Hum Ergol (Tokyo). 2001 Dec;30(1-2):107-11. [PMID: 14564867]
Rajaratnam SM, Dijk DJ, Middleton B, Stone BM, Arendt J. Melatonin phase-shifts human circadian rhythms with no evidence of changes in the duration of endogenous melatonin secretion or the 24-hour production of reproductive hormones.
J Clin Endocrinol Metab. 2003 Sep;88(9):4303-9. Erratum in: J Clin Endocrinol Metab. 2004 Jun; 89(6):2997. [PMID: 12970302]
Rajaratnam SM, Arendt J. Health in a 24-h society.
Lancet. 2001 Sep 22; 358(9286):999-1005. Review. [PMID: 11583769]
Rajaratnam SM, Redman JR. Circadian locomotor activity rhythms of the diurnal Indian palm squirrel in constant light.
Chronobiol Int. 2001 Jan; 18(1):47-60. [PMID: 11247113]
Rajaratnam SM, Redman JR. Social contact synchronizes free-running activity rhythms of diurnal palm squirrels.
Physiol Behav. 1999 Mar; 66(1):21-6. [PMID: 10222468]
Rajaratnam SM, Redman JR. Entrainment of activity rhythms to temperature cycles in diurnal palm squirrels.
Physiol Behav. 1998 Jan;63(2):271-7. [PMID: 9423969]
Rajaratnam SM, Redman JR. Effects of daily melatonin administration on circadian activity rhythms in the diurnal Indian palm squirrel (Funambulus pennanti).
J Biol Rhythms. 1997 Aug;12(4):339-47. [PMID: 9438882]
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