Circadian and homeostatic factors in arousal

被引:29
|
作者
Silver, Rae [1 ,2 ,3 ]
LeSauter, Joseph [1 ]
机构
[1] Columbia Univ Barnard Coll, Dept Psychol, New York, NY 10027 USA
[2] Columbia Univ, Dept Psychol, Neurobiol & Behav Lab, New York, NY 10027 USA
[3] Columbia Univ, Med Ctr, Dept Pathol & Cell Biol, New York, NY USA
来源
MOLECULAR AND BIOPHYSICAL MECHANISMS OF AROUSAL, ALERTNESS, AND ATTENTION | 2008年 / 1129卷
关键词
suprachiasmatic nucleus; hypothalamus; feeding; reproduction; sleep/wake;
D O I
10.1196/annals.1417.032
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
In the course of evolution, mechanisms have evolved to anticipate the timing of regularly occurring events. These mechanisms are encompassed in a circadian timing system that include a master clock localized to the suprachiasmatic nucleus of the hypothalamus and "slave" oscillators distributed throughout the body. This system serves multiple functions so as to ensure that various physiological processes occur at optimal and nonoverlapping times, to synchronize our activities to local environmental time, and to permit changes required to respond to new environmental circumstances. We suggest that a generalized concept of arousal (which includes alterations in responsiveness to homeostatic pressures, sensory stimuli and emotional reactivity, and to changes in motor activity) serves as a rubric in which to explore the multiple ways in which the circadian system modulates behavior.
引用
收藏
页码:263 / 274
页数:12
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