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Sleep-Wake Actigraphy and Light Exposure During Spaceflight
DSO 634


Overview
Disruption of sleep during spaceflight, both short and long duration, is associated with inappropriately timed (non-24 hour) or insufficiently intense light exposure. Sleep disruption and circadian misalignment can lead to subjective dissatisfaction with self-reported sleep quality and daytime alertness. Both of these conditions are associated with insomnia and associated impairment of alertness and cognitive performance, which could impair mission success.
History/Background
This experiment will use state-of-the-art ambulatory technology to monitor sleep-wake activity and light exposure patterns obtained in flight. These data should help researchers better understand the effects of spaceflight on sleep, as well as aid in the development of effective countermeasures for both short- and long-duration spaceflight.


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Updated: 06/22/2001

Boeing NASA United Space Alliance

Editorial/Technical Comments: ShuttlePresskit