Circadian Dyschronism and Chronotypic Ecophilia as Factors in Aging and Longevity

  • Charles F. Ehret
  • Kenneth R. Groh
  • John C. Meinert
Part of the Advances in experimental medicine and biology book series (AEMB, volume 108)


By “circadian dyschronism” we mean the absence of a strong daily rhythm in an organism where normally one is found (Halberg, 1973; Ehret and Dobra, 1976). Ecophilia (from ekos, home, and philia, liking) means satisfaction with one’s immediate environment (Meinert et al., 1975). But the warm-loving thermophiles and sun-loving photophiles of this world display the constancy of fickle lovers; their affections are usually turned on and off in a temporal fashion that is circadian and chronotypic — that is to say time-of-day dependent or, more precisely (and whether they “know it” or not), dependent upon the phase of the organism’s circadian cell cycle (Bunning, 1973; Ehret, 1974; Ehret et al., 1977).


Phase Shift Circadian Rhythm Phase Advance Circadian System Circadian Regulation 
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Copyright information

© Springer Science+Business Media New York 1978

Authors and Affiliations

  • Charles F. Ehret
    • 1
  • Kenneth R. Groh
    • 1
  • John C. Meinert
    • 1
  1. 1.Division of Biological and Medical ResearchArgonne National LaboratoryArgonneUSA

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