Central Control of Circadian and Ultradian Neuroendocrine Rhythms

  • I. Assenmacher
Conference paper
Part of the Acta Neurochirurgica book series (NEUROCHIRURGICA, volume 47)


The very first pioneers of the concept of homeostasis, particularly Henderson, stated as long ago as the twenties that within the homeostatic range the fluctuations of physiological parameters follow a rhythmic pattern and such biological rhythms play an adaptive role. A deeper insight into the mechanisms underlying biological rhythms has only been gained in the past two decades (Krieger 1979, Aschoff 1981, Moore-Edde et al. 1982). The most ubiquitous biological oscillators appeared to be circadian rhythms, that is, rhythms with a 24 h periodicity. These were evident not only over the whole zoological scale up to humans, but also at all levels of the organism, from the basic cellular processes up to the most integrated functions. Moreover, recent studies in molecular biology have provided evidence that the circadian pattern of biological rhythms has a genetic basis (Bargiello et al. 1984, Reddy et al. 1984).


Median Eminence Suprachiasmatic Nucleus Biological Rhythm Circadian Pattern Behavioral Rhythm 
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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • I. Assenmacher
    • 1
  1. 1.Laboratory Endocrinological Neurobiology, UA 1197-CNRSUniversity of Montpellier IIMontpellierFrance

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