Circadian rhythms of early morning awakening insomniacs.


It has been suggested that two types of insomnia, sleep onset insomnia and early morning awakening insomnia, may be caused by delays and advances respectively of circadian rhythms. Evidence supports the circadian rhythm phase delay of sleep onset insomniacs. The present study investigated the phase timing of circadian rhythms of early morning awakening… (More)


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@article{Lack1996CircadianRO, title={Circadian rhythms of early morning awakening insomniacs.}, author={Leon C. Lack and Jeremy D Mercer and Helen R Wright}, journal={Journal of sleep research}, year={1996}, volume={5 4}, pages={211-9} }