Hypobaric hypoxia (decreased oxygen supply to body tissues due to low atmospheric pressure) caused by exposure to high altitude disrupts sleep. Sleep deprivation is associated with degraded post-sleep performance of neurobehavioral tasks. The lowest altitude at which sleep and/or post-sleep performance are affected is not known. The study hypothesis is that sleep and/or post-sleep performance of neurobehavioral tasks will occur due to hypobaric hypoxia at altitudes of 8,000 or less.
Age range
30 Years – 60 Years
Sex
MALE
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Quality and quantity of sleep measured by actigraphy and polysomnography Neurobehavioral performance measured by Psychomotor Vigilance Test (PVT) and Automated Neurophysiologic Assessment Metrics Battery (ANAM)
Timeframe: 7 hours; 4 hours