Sleep and Chronobiology Laboratory

Administrative Research Center (ARC), Room A29

3100 Marine Street
Boulder, CO 80309-0554
phone: 303-735-1923
fax: 303-735-2864

Research Interests

  • Health and safety consequences of sleep and circadian disruption.

  • Influence of sleep and circadian rhythms on human physiology (neuroendocrine, metabolic and immune function) and behavior (sleepiness, memory, learning, mood, cognitive and motor performance) with application to public health and safety.

  • Countermeasures to improve sleep and wakefulness.


  • Director: Kenneth P. Wright Jr., Ph.D.
  • Assistant Research Professor: Josiane Broussard, Ph.D.
  • Postdoctoral Fellow: Christopher Depner, Ph.D.
  • Graduate Students: Sarah Morton, Hannah Ritchie, B.S., Ellen B. Stothard, M.S.
  • Undergraduate Students: Kyle Ambler, Andres Barandiaran, Paul Bisesi, Sydney Burckhardt, Sean Fitzsimmons, Molly Guerin, Jeffrey Higdon, Oliver Knauer, Blake Kutz, Julia Lip, Emily Marbas, Katelyn O’mara, Heidi Roeber, Ruth Sanchez, Steven Sares, Kate Tara, Jessica Wu, Ethan Zerpa-Blanco.
  • Professional Research Assistants: Jake Guzzetti, B.A., Gayle Wright, MSW, LCSW.
  • Collaborators: Charles A. Czeisler, Ph.D., M.D., Harvard Medical School, Brigham and Women's Hospital; Robert H. Eckel, M.D., University of Colorado Anschutz Medical Campus; Leigh Perreault, M.D., University of Colorado Anschutz Medical Campus; Edward Melanson, Ph.D., University of Colorado Anschutz Medical Campus; John O'Neill, Ph.D. Cambridge University; Phyllis Zee, M.D., Ph.D., Northwestern University.
Back Row (L to R): Dr. Kenneth P. Wright, Steven Sares, Sarah Morton, Sean Fitzsimmons, Oliver Knauer, Dr. Christopher Depner.
Middle Row (L to R): Ellen Stothard, Heidi Roeber, Ethan Zerpa-Blanco, Erin Radtke, Andres Barandiaran, Kyle Ambler, Dr. Josie Broussard.
Front Row (L to R): Hannah Ritchie, Sydney Burckhardt, Ruth Sanchez, Molly Guerin, Emily Marbas, Sarah Neff, Gayle Wright, Steve Sainbayar.

Current Research Projects

  • Influence of sleep loss, sleep inertia and circadian disruption on cognitive function.

  • Countermeasures to improve sleep and wakefulness.

  • Physiological and behavioral mechanisms by which insufficient sleep contributes to obesity and diabetes.

  • Physiological mechanisms by which circadian misalignment contributes to metabolic dysregulation.

  • Early morning shift work and sleep disturbance.

  • Resetting the human circadian clock with photic and non-photic stimuli.

Persons interested in volunteering to participate in one of these studies should visit the sleep study participant page.

Colorado Sleep and Circadian Research Symposium, June 2016 | 2015 | 2014

Opportunities for Undergraduate Students

  • The requirements for undergraduate students who want a research experience in our Laboratory are:
    • A strong desire to obtain research experiences prior to graduate school, medical school, or advanced study in a health-related field
    • Minimum commitment: One year
    • Minimum hours/week when testing subjects: 10 hours (includes journal club)
    • Minimum experience: No prior experience required
    • Must be willing to work with a team
    • Must be able to work various hours during the day, at night, and on weekends.

  • UROP, independent study, honors thesis, and concurrent BA-MS opportunities are available.

  • For more information, contact


Camping Syncs Internal Clock with Nature (Entrainment of the Human Circadian Clock to the Natural Light-Dark Cycle). Production and Editing: Brandon R. Griffin.

Recent Publications