Abstract
The two-process model of sleep regulation postulates that a homeostatic and a circadian process underlie sleep regulation. The timing of sleep and waking is accounted for by the interaction of these two processes. The assumptions of two separate processes or of a single process resulting from their additive interaction are mathematically equivalent but conceptually different. Based on an additive interaction, subjective alertness ratings in a forced desynchrony protocol and subjective sleepiness ratings in a photoperiod experiment were simulated. The correspondence between empirical and simulated data supports the basic assumption of the model.
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Achermann, P., Borbély, A.A. Simulation of daytime vigilance by the additive interaction of a homeostatic and a circadian process. Biol. Cybern. 71, 115–121 (1994). https://doi.org/10.1007/BF00197314
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DOI: https://doi.org/10.1007/BF00197314