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. 1994;71(2):115-21.
doi: 10.1007/BF00197314.

Simulation of daytime vigilance by the additive interaction of a homeostatic and a circadian process

P Achermann  1 , A A Borbély
Affiliations

Simulation of daytime vigilance by the additive interaction of a homeostatic and a circadian process

P Achermann et al. Biol Cybern. 1994.

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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