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Main Title Ultradian Rhythms from Molecules to Mind A New Vision of Life / [electronic resource] :
Author Lloyd, David.
Other Authors
Author Title of a Work
Rossi, Ernest L.
Publisher Springer Netherlands,
Year Published 2008
Call Number QH301-705
ISBN 9781402083525
Subjects Life sciences ; Neurosciences ; Aesthetics ; Philosophy of mind ; Medicine
Internet Access
Description Access URL
Collation X, 450 p. online resource.
Due to license restrictions, this resource is available to EPA employees and authorized contractors only
Contents Notes
The Molecular-Genetic-Cellular Level -- The Ultradian Clock (~40 min) in Yeast (Saccharomyces cerevisiae) -- ENOX Proteins, Copper Hexahydrate-Based Ultradian Oscillators of the Cells' Biological Clock -- Self-Organized Intracellular Ultradian Rhythms Provide Direct Cell-Cell Communication -- Phosphorylation Dynamics in Mammalian Cells -- Is There a Mitochondrial Clock? -- Invertebrate Systems -- Ultradian and Circadian Rhythms: Experiments and Models -- Ultradian Lovesong Rhythms in Drosophila -- Mid-range Ultradian Rhythms in Drosophila and the Circadian Clock Problem -- Tidal Rhythms -- The Neuroendocrineal and Developmental Level -- Pulsatile Hormone Secretion: Mechanisms, Significance and Evaluation -- Ultradian Rhythms as the Dynamic Signature of Life -- The Mammalian Circadian Timekeeping System -- Ultradian and Circadian Rhythms in Human Experience -- Ultradian Cognitive Performance Rhythms During Sleep Deprivation -- High Frequency EEG and Its Relationship to Cognitive Function -- Total Sleep Deprivation and Cognitive Performance: The Case for Multiple Sources of Variance -- Open Questions on Mind, Genes, Consciousness, and Behavior: The Circadian and Ultradian Rhythms of Art, Beauty, and Truth in Creativity -- Genes, Sleep and Dreams -- Epilogue: A New Vision of Life. 5. 1. 1 Biological Rhythms and Clocks From an evolutionary perspective, the adaptation of an organism's behavior to its environment has depended on one of life's fundamental traits: biological rhythm generation. In virtually all light-sensitive organisms from cyanobacteria to humans, biological clocks adapt cyclic physiology to geophysical time with time-keeping properties in the circadian (24 h), ultradian (24 h) domains (Edmunds, 1988; Lloyd, 1998; Lloyd et al. , 2001; Lloyd and Murray, 2006; Lloyd, 2007; Pittendrigh, 1993; Sweeney and Hastings, 1960) By definition, all rhythms exhibit regular periodicities since they constitute a mechanism of timing. Timing exerted by oscillatory mechanisms are found throughout the biological world and their periods span a wide range from milliseconds, as in the action potential of n- rons and the myocytes, to the slow evolutionary changes that require thousands of generations. In this context, to understand the synchronization of a population of coupled oscillators is an important problem for the dynamics of physiology in living systems (Aon et al. , 2007a, b; Kuramoto, 1984; Strogatz, 2003; Winfree, 1967). Circadian rhythms, the most intensively studied, are devoted to measuring daily 24 h cycles. A variety of physiological processes in a wide range of eukaryotic organisms display circadian rhythmicity which is characterized by the following major properties (Anderson et al. , 1985; Edmunds, 1988): (i) stable, autonomous (self-sustaining) oscillations having a free-running period under constant envir- mental conditions of ca.