Perlis and colleagues · 2001
Fast-frequency activity measured during sleep.
What the study found
Quantitative analysis of sleep EEG found more beta and gamma activity during non-REM sleep in people with primary insomnia than in the secondary-insomnia and good-sleeper comparison groups.
What this tells us
The findings support studying persistent fast-frequency activity during sleep as a feature of insomnia-related arousal. These measurements came from sleep recordings, rather than a routine awake resting map.
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