Is Insomnia a Disease of Slow-Wave Sleep?

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Abstract
Whetter a disturbance of slow-wave sleep [SWS] may partly account for the imbalance between waking and sleep observed in insomnia was studied in subjects and 40 insomniacs. No direct interregulation appeared between total sleep and REM [rapid eye movement] sleep on one hand, and between SWS and REM sleep on the other. SWS was linked to the waking-sleep imbalance, as low values of stages 3 and 4 were statistically associated with low total sleep duration. The reduction of SWS could not merely be attributed to an increased pressure of wakefulness. A disturbance in itself is indicated, perhaps related in some cases to a precocious senescence of sleep, but this does not account alone for all sleep disturbances.

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