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2001, Number 2

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Rev Fac Med UNAM 2001; 44 (2)

Feeding as a bio-rhythm synchronizer

Escobar C, Martínez MMT , Ángeles M, Mendoza JY

Language: Spanish
References: 20
Page: 58-62
PDF size: 66.06 Kb.


ABSTRACT

Besides the adaptation to cyclic variations such as day-night, seasons or temperature and humidity changes, living beings have developed adjusting mechanisms of their physiology and conduct to other changes. In the process of evolution there appear biological clocks, whose prototype is the suprachiasmatic nucleus of the hypothalamus which reacts to afferent signals from the retina and informs the central nervous system.
There are others local pace-makers in organs like the liver or the lung that show circadian oscillations and represent synchronizers of different rythms. Through experiments in rats the AA demonstrate that the act of feeding is one of those synchronizers and that food restriction or changes in the time of feeding affects energy balance, anabolism or catabolism periods reflected in fat-acids and cetonic bodys levels in blood as well as those of glucose, insuline and leptin. The liver can be considered a circadian oscillator by means of a system capable of computing time.


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