منابع مشابه
[Sleep-wake cycle mechanisms].
Neurochemically distinct systems interact regulating sleep and wakefulness. Wakefulness is promoted by aminergic, acetylcholinergic brainstem and hypothalamic systems. Each of these arousal systems supports wakefulness and coordinated activity is required for alertness and EEG activation. Neurons in the pons and preoptic area control rapid eye movement and non-rapid eye movement sleep. Mutual i...
متن کاملCircadian control of the sleep-wake cycle.
It is beyond doubt that the timing of sleep is under control of the circadian pacemaker. Humans are a diurnal species; they sleep mostly at night, and they do so at approximately 24-h intervals. If they do not adhere to this general pattern, for instance when working night shifts or when travelling across time zones, they experience the stubborn influence of their circadian clock. In recent yea...
متن کاملSleep–Wake Cycle in Rural Populations
The light/dark cycle is the main zeitgeber acting on the mammalian circadian system; nevertheless, distinct environments, such as those with and without electricity may provoke important resetting effects on the clock. The aim of this study was to describe sleep/wake patterns of adolescents living in two Brazilian rural regions. In the first population, 120 adolescents participated in the study...
متن کاملOrexins, energy balance, temperature, sleep-wake cycle.
THE LAST DECADES HAVE WITNESSED an upsurge of neuropeptide research. These substances regulate or influence various functions like appetite, water intake, learning and memory, adaptive responses to environmental stress, thermoregulation and fever, social behavior, and sleep. One function may be affected by several peptides, and a single peptide can be involved in different functions—a general a...
متن کاملBrain Energetics During the Sleep-Wake Cycle
Brain activity during wakefulness is associated with high metabolic rates that are believed to support information processing and memory encoding. In spite of loss of consciousness, sleep still carries a substantial energy cost. Experimental evidence supports a cerebral metabolic shift taking place during sleep that suppresses aerobic glycolysis, a hallmark of environment-oriented waking behavi...
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ژورنال
عنوان ژورنال: Journal of Applied Biomedicine
سال: 2008
ISSN: 1214-021X,1214-0287
DOI: 10.32725/jab.2008.016