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Alexander A. Borbély (born 1939 in Budapest) is a Hungarian-Swiss pharmacologist known for his sleep research.. Borbély proposed the two-process model of sleep regulation in 1982 which postulates there are two complementary processes (S and C, which stands for Sleep and Circadian, respectively) which together account for one's sleep schedule. [1]
This two process model was first proposed in 1982 by Borbely, [97] who called them Process S (homeostatic) and Process C (Circadian) respectively. He showed how the slow wave density increases through the night and then drops off at the beginning of the day while the circadian rhythm is like a sinusoid.
It was called the two-process model of sleep regulation and explained human sleep regulation in terms of two key processes: a circadian pacemaker, and a homeostatic drive to sleep that increases during wake and decreases during sleep. [4] Today, the two process model is used as the basis for most predictive models of sleep and performance.
To describe the temporal course of the sleep-wake cycle, a two-process model of sleep regulation can be mentioned. [69] This model proposes a homeostatic process (Process S) and a circadian process (Process C) that interact to define the time and intensity of sleep. [71]
1987: Demonstrated that sleep timing can be shifted by bright light [9] 1988: Identified gender differences in human sleep [11] 1994/5: Characterized the circadian process regulating human sleep [12] 1999: Discovered how circadian regulation of sleep changes with ageing [13] 2004: Discovered melatonin's effects on human sleep timing [9]
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According to the dual-process hypothesis of sleep and memory, the two major phases of sleep correspond to different types of memory. "Night half" studies have tested this hypothesis with memory tasks either begun before sleep and assessed in the middle of the night, or begun in the middle of the night and assessed in the morning.
Rocket-Firing Boba Fett Prototypes (1979): Only two dozen or so were made and this action figure had a different utility than other models. This would be why it sold for $204,435 at auction. This ...