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Clinical Trial Summary

This study aims to assess whether slow wave sleep enhancement using SmartSleep technology benefits daytime cognitive performance during periods of chronic sleep restriction.


Clinical Trial Description

Adequate healthy sleep is essential in spaceflight to ensure that astronauts maintain a high level of cognitive performance capability and do so without undue stress. There is a need for a technology that can improve sleep quality in space and biologically maximize the performance benefits of limited sleep duration, without unduly affecting the ability of astronauts to awaken abruptly and respond to an in-flight emergency. Sleep slow waves support system and synaptic consolidation by promoting specific patterns of neuromodulatory and electric activities, and subjective sleep quality is related to the size and number of slow waves that occur nightly. This study will use SmartSleep (Philips) technology to determine what effect the device has on daytime cognitive performance after emergent awakenings from sleep in a chronic sleep restriction paradigm. The SmartSleep technology uses two small sensors in the headband to continuously detect the brain's slow wave sleep (delta/theta frequency) in real time, and a closed-loop algorithm customizes the timing and volume of tones to optimize the sleep pattern. Thus, the device uses "quiet audio tones" (sub-awareness) to increase slow waves, which can enhance sleep quality/depth, thereby enhancing subsequent waking cognitive performance without the unwanted sedating effects of medications on cognitive functions during emergency awakenings. Subjects will be in the laboratory for 7 days/6 nights. Night 1 will be an adaptation night with 8-hours time in bed. Nights 2-5 will consist of 5 hours time in bed, followed by night 6 of a recovery 10 hours time in bed. During nights 2-5, subjects will receive one of four stimulation modalities using the SmartSleep wearable device. Subjects will receive all four modalities in a randomized order: 1. Continuous Fixed Interval 2. Block 3. In-Phase Adjustable 4. Sham: No auditory stimulation while wearing the SmartSleep headband Cognitive performance testing and self-report surveys will be completed on a daily basis. A total of 12 healthy astronaut-like adults will be studied. Subjects will complete the 7-day study in groups of 4. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03911154
Study type Interventional
Source University of Pennsylvania
Contact
Status Completed
Phase N/A
Start date April 29, 2019
Completion date June 30, 2021

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