Titlebook: Circadian Clocks; Joseph S. Takahashi,Fred W. Turek,Robert Y. Moore Book 2001 Springer Science+Business Media New York 2001 behavior.evol

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Circadian Rhythms in Unicellular Organismsle unicellular systems have told us about clocks that are particularly relevant to clock studies in higher organisms. This chapter does not pretend to review the literature exhaustively; rather, we discuss a few salient points. Other chapters in this volume specifically address clock studies about .

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Circadian Systems of Invertebrates traced to the work of Janet Harker in the 1950s, who initiated efforts to localize pacemakers and photoreceptors of the circadian system of the cockroach via lesion and transplantation studies. Ultimately, Harker was not successful, but the questions and approaches she pioneered set the stage for s

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Suprachiasmatic Nucleuseurons dorsal to the optic chiasm along most of its length and just lateral to the periventricular nucleus and third ventricle (Figure 1). The SCN was recognized in early cytoarchitectonic studies (Brockhaus, 1942; Gurdjian, 1927), but its function remained obscure until the early 1970s. Perhaps the

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Food-Entrainable Oscillators in Mammalsressures must have shaped efficient feeding strategies. For foraging omnivores and carnivores, some food sources may be available only during temporal windows within the day and these may change during seasons. For herbivores, food sources are more constant on a daily basis, but it may be advantageo

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Development of Mammalian Circadian Rhythmslopment often begin with describing how normal development proceeds, then ask how the observed processes or events are regulated. At the level of the whole organism, the most fundamental of such questions (even if oversimplified) is to ask whether the behavior, structure, or physiologic process of i

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Cellular and Molecular Mechanisms of Circadian Regulation in the Unicellular Dinoflagellate ,i (SCN) in the mammalian brain, robust circadian rhythms also occur in unicellular organisms, including prokaryotes (Golden, Ishiura, Johnson, & Kondo, 1997; Hastings, Boulos, & Rusak, 1991; Johnson, Golden, Ishiura, & Kondo, 1996; Kondo.1994; Sweeney, 1987). Such rhythms, for example in motility, r