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Interaction of Chronic Sleep Restriction and Circadian Misalignment on Sleep and Neuro-cognitive Performance
This study has been completed.
Sponsor:
Brigham and Women's Hospital
Information provided by (Responsible Party):
Elizabeth B. Klerman, Brigham and Women's Hospital
ClinicalTrials.gov Identifier:
NCT00438438
First received: February 20, 2007
Last updated: August 31, 2011
Last verified: August 2011
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Purpose
The primary objectives of the proposed experimental and modeling efforts are to quantify the influences of acute sleep deprivation (short-term homeostatic), chronic sleep restriction (long-term homeostatic), circadian rhythmicity, and their interactions on neurocognitive performance and to develop a new model of sleep homeostasis that can predict the effects of chronic sleep restriction. This model will be based on the underlying neuroanatomy and neurophysiology. This new model will facilitate optimization of human performance in operational settings, such as are seen in military operation and other work environments.
| Condition | Intervention |
|---|---|
| Healthy | Behavioral: forced desynchrony protocol with sleep restriction |
| Study Type: | Interventional |
| Study Design: | Allocation: Randomized Intervention Model: Crossover Assignment Masking: Open Label Primary Purpose: Health Services Research |
| Official Title: | "Interaction of Chronic Sleep Restriction and Circadian Misalignment on Sleep and Neuro-cognitive Performance" |
Resource links provided by NLM:
Further study details as provided by Elizabeth B. Klerman, Brigham and Women's Hospital:
Primary Outcome Measures:
- Sleep Stage [ Time Frame: 38 days ]
- Circadian Phase (melatonin rhythm) [ Time Frame: 38 days ]
- Psychomotor Vigilance Task [ Time Frame: 38 days ]
- Digit Symbol Substitution Task [ Time Frame: 38 days ]
- Addition Task [ Time Frame: 38 days ]
- Karolinska Sleepiness Scale [ Time Frame: 38 days ]
- Karolinska Drowsiness Test [ Time Frame: 38 days ]
- Mood Scales [ Time Frame: 38 days ]
- Flanker Task [ Time Frame: 38 days ]
- Multiple Object Tracking [ Time Frame: 38 days ]
| Estimated Enrollment: | 9 |
| Study Start Date: | April 2006 |
| Study Completion Date: | November 2008 |
| Primary Completion Date: | November 2008 (Final data collection date for primary outcome measure) |
Intervention Details:
Detailed Description:
-
Behavioral: forced desynchrony protocol with sleep restriction
Subjects are scheduled to live on a non-24 hour day. This separates the sleep-wake schedule from the near-24 hour circadian rhythm. This allows assessment of how circadian rhythms and the length-of-time awake contribute to sleepiness, alertness, and cognitive performance.
This protocol involves a baseline period consisting of 14 hours of wakefulness and 10 hour nocturnal sleep episodes each 24 hours. This is followed by a forced desynchrony regimen spanning 21 calendar days and consisting of 12 cycles ("days") of a 42.85-hour wake:bedrest schedule. In each 42.85 hour cycle, there are 32.85 hours of scheduled wakefulness and 10 hour sleep opportunities. This will allow assessment of the independent contributions of circadian phase and homeostatic sleep pressure on sleep and neurobehavioral performance. This forced desynchrony regimen is followed by 10 recovery days consisting of 14 hours of wakefulness and 10 hour nocturnal sleep episodes each 24 hours.
Eligibility| Ages Eligible for Study: | 18 Years to 35 Years (Adult) |
| Sexes Eligible for Study: | All |
| Accepts Healthy Volunteers: | Yes |
Criteria
Inclusion Criteria:
- Age 18-35 years old
- Medically healthy
Exclusion Criteria:
- Sleep disorder
- Psychiatric illness
- Chronic medical condition
- No prescription or Non-prescription medications
Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00438438
Please refer to this study by its ClinicalTrials.gov identifier: NCT00438438
Locations
| United States, Massachusetts | |
| Brigham and Woman's Hospital | |
| Boston, Massachusetts, United States, 02115 | |
Sponsors and Collaborators
Brigham and Women's Hospital
Investigators
| Principal Investigator: | Elizabeth B Klerman, M.D., Ph.D. | Brigham and Woman's Hospital |
| Principal Investigator: | Charles A Czeisler, Ph.D., M.D. | Brigham and Woman's Hospital |
More Information
| Responsible Party: | Elizabeth B. Klerman, Associate Professor, Associate Physician, Brigham and Women's Hospital |
| ClinicalTrials.gov Identifier: | NCT00438438 History of Changes |
| Other Study ID Numbers: |
2200-100792 |
| Study First Received: | February 20, 2007 |
| Last Updated: | August 31, 2011 |
Keywords provided by Elizabeth B. Klerman, Brigham and Women's Hospital:
|
forced desynchrony circadian rhythms sleep restriction sleep homeostasis neurobehavioral performance |
ClinicalTrials.gov processed this record on June 22, 2017