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'Sleep debts' accrue when nightly sleep totals six hours or fewer

subjects who had gone without sleep for more than three nights.

The first group of subjects experienced increasing lapses in psychomotor vigilance over days, resulting in a decline of performance that matched that of the subjects who went without sleep for 88 hours. At that level, the subjects suffered lapses in their ability to react that would put them at risk driving or flying an airplane. They were also less able to multi-task successfully.

"The physiologic expression of sleep in humans appears to have multiple functions, ranging from the metabolic to the neurocognitive," Van Dongen said.


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Contact: Ellen O'Brien
ellen.obrien@uphs.upenn.edu
215-349-5659
University of Pennsylvania School of Medicine
13-Mar-2003


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