19972021
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Personal profile

Biography

Sleep is increasingly recognised as the third pillar of good health, along side diet and exercise. Poor sleep quality and sleep deficiency are linked to a number of serious health problems, including depression and cardiovascular disease, as well as impaired alertness and neurocognitive functioning, reduced productivity and increased accident risk.

Our research program aims to investigate the role of the internal biological clock in the regulation of the sleep-wake cycle, and how disruption of the clock leads to sleep disorders and other physiological consequences (for example, in shift workers). We are developing novel treatment approaches for sleep disorders that are caused by biological clock disruption. These include light and melatonin treatments. We are also investigating the contribution of sleep disturbances and fatigue to mood disorders and impaired cognition in clinical populations.

Sleep loss and impaired alertness adversely affect occupational safety, health and productivity, and also road safety. About 20 percent of serious car crash injuries are associated with driver sleepiness. Our research is examining innovative technologies to monitor alertness in occupational and transportations settings, and is developing and testing intervention strategies aimed at reducing the burden associated with impaired alertness in these contexts.

Community service

2011-present President, Australasian Sleep Association

http://www.sleep.org.au/

Research interests

  • Circadian regulation of sleep and wakefulness
  • Effects of melatonin and melatonin agonists on sleep and circadian rhythms
  • Effects of light on the human circadian system
  • Consequences of sleep loss and sleep disruption in neuropsychiatric disorders
  • Development of interventions for sleep loss and sleepiness in transport and occupational settings
  • Legal issues relating to sleep loss and sleepiness

Monash teaching commitment

2011-present Director of Undergraduate Programs, School of Psychology and Psychiatry

Keywords

  • Circadian rhythms
  • Insomnia
  • Light
  • Melatonin
  • Shift work
  • Sleep
  • Sleep Loss
  • Sleep disorders
  • Sleepiness-related crashes

Network Recent external collaboration on country level. Dive into details by clicking on the dots.

Projects 2003 2021

Research Output 1997 2018

Chronotype and environmental light exposure in a student population

Porcheret, K., Wald, L., Fritschi, L., Gerkema, M., Gordijn, M., Merrrow, M., Rajaratnam, S. M. W., Rock, D., Sletten, T. L., Warman, G., Wulff, K., Roenneberg, T. & Foster, R. G. 15 Jun 2018 (Accepted/In press) In : Chronobiology International. 10 p.

Research output: Contribution to journalArticleResearchpeer-review

Open Access
File

Efficacy of melatonin for sleep disturbance following traumatic brain injury: A randomised controlled trial

Grima, N. A., Rajaratnam, S. M. W., Mansfield, D., Sletten, T. L., Spitz, G. & Ponsford, J. L. 19 Jan 2018 In : BMC Medicine. 16, 1, 10 p., 8

Research output: Contribution to journalArticleResearchpeer-review

Open Access
File

Efficacy of melatonin with behavioural sleep-wake scheduling for delayed sleep-wake phase disorder: A double-blind, randomised clinical trial

Sletten, T. L., Magee, M., Murray, J. M., Gordon, C. J., Lovato, N., Kennaway, D. J., Gwini, S. M., Bartlett, D. J., Lockley, S. W., Lack, L. C., Grunstein, R. R., Rajaratnam, S. M. W. & for the Delayed Sleep on Melatonin (DelSoM) Study Group 18 Jun 2018 In : PLoS Medicine. 15, 6, 24 p., e1002587

Research output: Contribution to journalArticleResearchpeer-review

Open Access
File

Increased sensitivity of the circadian system to light in delayed sleep-wake phase disorder

Watson, L. A., Phillips, A. J. K., Hosken, I. T., McGlashan, E. M., Anderson, C., Lack, L. C., Lockley, S. W., Rajaratnam, S. M. W. & Cain, S. W. 2018 (Accepted/In press) In : The Journal of Physiology.

Research output: Contribution to journalArticleResearchpeer-review

Increased vulnerability to attentional failure during acute sleep deprivation in women depends on menstrual phase

Vidafar, P., Gooley, J., Burns, A. C., Rajaratnam, S. M. W., Rueger, M., Van Reen, E., Czeisler, C. A., Lockley, S. W. & Cain, S. W. Aug 2018 In : Sleep. 41, 8, 9 p., zsy098

Research output: Contribution to journalArticleResearchpeer-review

Open Access
File

Press / Media

CREATORS: 'Immersive Installation Explores Sleep Culture and Insomnia'

Matthew Bird, Marcus McMahon, Shanthakumar Madhan Wilson Rajaratnam, Sean Patrick Andrews Drummond, Caitlyn Parry, J David Franke & Phillip Adams

7/07/17

1 item of media coverage

Press/Media: Other

ART ALMANAC: 'Matthew Bird: Dormitorium'

Matthew Bird, Marcus McMahon, Shanthakumar Madhan Wilson Rajaratnam, Sean Patrick Andrews Drummond, Caitlyn Parry, J David Franke & Phillip Adams

10/06/17

1 item of media coverage

Press/Media: Other

SMH: 'Trouble sleeping? Designers might have the answer (here's a clue: lose the blue)'

Matthew Bird, Marcus McMahon, Shanthakumar Madhan Wilson Rajaratnam, Sean Patrick Andrews Drummond, Caitlyn Parry, J David Franke & Phillip Adams

28/03/17

1 item of media coverage

Press/Media: Other

ABC RADIO NATIONAL: 'An invitation to sleep'

Matthew Bird, Marcus McMahon, Shanthakumar Madhan Wilson Rajaratnam, Sean Patrick Andrews Drummond, Caitlyn Parry, J David Franke & Phillip Adams

20/03/17

1 item of media coverage

Press/Media: Other

ARTSHUB: 'An exhibition that wants to send you to sleep'

Matthew Bird, Marcus McMahon, Shanthakumar Madhan Wilson Rajaratnam, Sean Patrick Andrews Drummond, Caitlyn Parry, J David Franke & Phillip Adams

14/03/17

1 item of media coverage

Press/Media: Other