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CNS arousal and neurobehavioral performance in a short-term sleep restriction paradigm
Journal of Sleep Research, 08/20/09

Cote KA et al. – Short-term sleep restriction leads to deficits in performance as well as electroencephalogram (EEG) slowing that correspond to the amount and duration of sleep loss. High-frequency EEG may be a marker of effort or compensation.

Methods

Study of waking electrophysiological measures of arousal during sleep restriction
Assessment of EEG activity and performance during 96-hr laboratory protocol
After baseline night of 8-hr sleep, randomization to 3-, 5-, or 8-hr sleep groups for next 2 nights sleep restriction (SR1, SR2), and then 8-hr recovery night

Results

Dose-dependent deficits on measures of mood, sleepiness, and reaction time during this short-term sleep restriction
Ratio of alpha to theta EEG recorded at rest indicated dose-dependent changes in CNS arousal
At 9:00 hrs, EEG slowing (sleepiness) during restriction for both 3- and 5-hr groups; greater deficits for 3-hr group
At 13:00 hrs, 5-hr group no longer had EEG slowing; extent of slowing more widespread across scalp for 3-hr group
Greater high-frequency EEG (measure of effort) on mornings after sleep restriction
Increased beta EEG at central-parietal sites after both nights of restriction for 5-hr group
Increased beta and gamma EEG at occipital regions after first night only for 3-hr group

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