Results 1 to 10 of about 152,576 (156)

Circadian rhythms [PDF]

Brain Research Reviews, 1993
Circadian rhythms are a ubiquitous adaptation of eukaryotic organisms to the most reliable and predictable of environmental changes, the daily cycles of light and temperature. Prominent daily rhythms in behavior, physiology, hormone levels and biochemistry (including gene expression) are not merely responses to these environmental cycles, however, but ...
Aronson, B. D., Bell-Pederson, D., Block, G. D., Bos, N. P. A., Dunlap, J. C., Eskin, A., Garceau, N. Y., Geusz, M. E., Johnson, K. A., Khalsa, S. B. S., Koster-Van Hoffen, G. C., Koumenis, C., Lee, Theresa M., LeSauter, J., Lindgren, K. M., Liu, Qiuyun, Ruby, N. F., Silver, Rae, Turek, F. W., Zatz, M., Zucker, Irving   +20 more
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Circadian rhythms and the liver

Liver International, 2023
AbstractThis narrative review briefly describes the mammalian circadian timing system, the specific features of the liver clock, also by comparison with other peripheral clocks, the role of the liver clock in the preparation of food intake, and its relationship with energy metabolism.
Costa, Rodolfo, Mangini, Chiara, Domenie, Esther D, Zarantonello, Lisa, Montagnese, Sara   +4 more
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Serotonin and circadian rhythms. [PDF]

Psychology & Neuroscience, 2010
All mammal behaviors and functions exhibit synchronization with environmental rhythms. This is accomplished through an internal mechanism that generates and modulates biological rhythms. The circadian timing system, responsible for this process, is formed by connected neural structures.
Pontes, André Luiz Bezerra de, Engelberth, Rovena Clara Galvão Januário, Nascimento Júnior, Expedito da Silva, Cavalcante, Judney Cley, Costa, Miriam Stela Maris de Oliveira, Pinato, Luciana, Toledo, Claudio Antonio Barbosa de, Cavalcante, Jeferson de Souza   +7 more
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Circadian rest-activity rhythms predict cognitive function in early Parkinson's disease independently of sleep [PDF]

, 2018
BACKGROUND: Cognitive impairment is a common and debilitating symptom of Parkinson's disease (PD), and its etiology is likely multifactorial. One candidate mechanism is circadian disruption. Although there is evidence of circadian abnormalities in PD, no
Cronin-Golomb, Alice, Hu, Kun, Li, Peng, Stavitsky Gilbert, Karina, Wu, Jade Q.   +4 more
core   +1 more source

Genetic basis of human circadian rhythm disorders. [PDF]

, 2013
Circadian rhythm disorders constitute a group of phenotypes that usually present as altered sleep-wake schedules. Until a human genetics approach was applied to investigate these traits, the genetic components regulating human circadian rhythm and sleep ...
Fu, Ying-Hui, Huang, Angela L, Jones, Christopher R, Ptáček, Louis J   +3 more
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Effects of environmental enrichment on behavioral responses to novelty, learning, and memory, and the circadian rhythm in cortisol in growing pigs [PDF]

, 2000
Previously we showed that pigs reared in an enriched environment had higher baseline salivary cortisol concentrations during the light period than pigs reared under barren conditions.
Blokhuis, Harry J.,, Burgwal, Johan A. van de,, Jong, Ingrid C. de,, Koolhaas, Jaap M.,, Korte, S. Mechiel,, Lambooij, Elbert,, Prelle, Ina T.,   +6 more
core   +1 more source

Environmental Circadian Disruption Elevates the IL-6 Response to Lipopolysaccharide in Blood [PDF]

, 2013
The immune system is regulated by circadian clocks within the brain and immune cells. Environmental circadian disruption (ECD), consisting of a 6-h phase advance of the light:dark cycle once a week for 4 weeks, elevates the inflammatory response to ...
Adams, Kandis L., Castanon-Cervantes, Oscar, Davidson, Alec J., Evans, Jennifer A.   +3 more
core   +2 more sources

Circadian rhythms in parasites

PLOS Pathogens, 2017
Copyright: © 2017 Rijo-Ferreira et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Filipa Rijo-Ferreira, Joseph S. Takahashi, Luisa M. Figueiredo   +2 more
openaire   +6 more sources

Arrhythmic perch hopping and rhythmic feeding of starlings in constant light: Separate circadian oscillators? [PDF]

, 1984
Perch hopping activity and food intake were recorded in starlings in different intensities of continuous illumination (LL), varying from 0.1 to 1000 lux. Circadian rhythmicity in perch hopping disappeared in 10 lux and all higher intensities. In contrast,
Daan, S.,, Gerkema, M.P.,, Gänshirt, G.,   +2 more
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Mechanism of robust circadian oscillation of KaiC phosphorylation in vitro [PDF]

, 2008
By incubating the mixture of three cyanobacterial proteins, KaiA, KaiB, and KaiC, with ATP in vitro, Kondo and his colleagues reconstituted the robust circadian rhythm of the phosphorylation level of KaiC (Science, 308; 414-415 (2005)).
Amdaoud, Clodong, Emberly, Garces, Gillespie, Hayashi, Hitomi, Ishiura, Ito, Iwasaki, Iwase, Kageyama, Kitayama, Kohei Eguchi, Masaki Sasai, Mehra, Mihalcescu, Mitsumasa Yoda, Mori, Mori, Nakajima, Nishiwaki, Nishiwaki, Nishiwaki, Pattanayek, Rust, Takigawa-Imamura, Terauchi, Tomita, Tomoki P. Terada, Uzumaki, Vakonakis, Vakonakis, van Zon, Williams, Xu, Xu, Ye, Yoda   +38 more
core   +3 more sources