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