Results 11 to 20 of about 42,382 (209)

Rhythms of Locomotion Expressed by Limulus polyphemus, the American Horseshoe Crab: II. Relationship to Circadian Rhythms of Visual Sensitivity [PDF]

open access: yes, 2008
In the laboratory, horseshoe crabs express a circadian rhythm of visual sensitivity as well as daily and circatidal rhythms of locomotion. The major goal of this investigation was to determine whether the circadian clock underlying changes in visual ...
Bedford, Lisa   +2 more
core   +3 more sources

Setting the biological time in central and peripheral clocks during ontogenesis [PDF]

open access: yes, 2006
In mammals, the principal circadian clock within the suprachiasmatic nucleus (SCN) entrains the phase of clocks in numerous peripheral tissues and controls the rhythmicity in various body functions. During ontogenesis, the molecular mechanism responsible
Bendová, Zdenka   +6 more
core   +1 more source

Importance of circadian timing for aging and longevity

open access: yesNature Communications, 2021
Circadian clocks link physiologic processes to environmental conditions and a mismatch between internal and external rhythms has negative effects on organismal health.
Victoria A. Acosta-Rodríguez   +3 more
doaj   +1 more source

Making Memories: Why Time Matters [PDF]

open access: yes, 2018
In the last decade advances in human neuroscience have identified the critical importance of time in creating long-term memories. Circadian neuroscience has established biological time functions via cellular clocks regulated by photosensitive retinal ...
Evans, M. D. R.   +2 more
core   +2 more sources

Rodent models for the analysis of tissue clock function in metabolic rhythms research [PDF]

open access: yes, 2017
The circadian timing system consists on a distributed network of cellular clocks that together coordinate 24-h rhythms of physiology and behavior. Clock function and metabolism are tightly coupled, from the cellular to the organismal level.
Astiz, Mariana   +3 more
core   +2 more sources

Disrupted circadian clocks and altered tissue mechanics in primary human breast tumours

open access: yesBreast Cancer Research, 2018
Background Circadian rhythms maintain tissue homeostasis during the 24-h day-night cycle. Cell-autonomous circadian clocks play fundamental roles in cell division, DNA damage responses and metabolism.
Eleanor Broadberry   +10 more
doaj   +1 more source

Spectres of Clock Evolution: Past, Present, and Yet to Come

open access: yesFrontiers in Physiology, 2022
Circadian clocks are phylogenetically widespread biological oscillators that allow organisms to entrain to environmental cycles and use their steady-state phase relationship to anticipate predictable daily phenomena – such as the light-dark transitions ...
Maria Luísa Jabbur   +1 more
doaj   +1 more source

Patterns of Activity Expressed by Juvenile Horseshoe Crabs [PDF]

open access: yes, 2013
Adult American horseshoe crabs, Limulus polyphemus, possess endogenous circadian and circatidal clocks controlling visual sensitivity and locomotion, respectively.
Chabot, Christopher C.   +3 more
core   +2 more sources

The Circadian Clock, the Immune System, and Viral Infections: The Intricate Relationship Between Biological Time and Host-Virus Interaction [PDF]

open access: yes, 2020
Living beings spend their lives and carry out their daily activities interacting with environmental situations that present space-time variations and that involve contact with other life forms, which may behave as commensals or as invaders and/or ...
Carbone, Annalucia   +3 more
core   +1 more source

Circadian rhythm and cell population growth [PDF]

open access: yes, 2010
Molecular circadian clocks, that are found in all nucleated cells of mammals, are known to dictate rhythms of approximately 24 hours (circa diem) to many physiological processes.
Bekkal Brikci   +27 more
core   +5 more sources

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