Results 11 to 20 of about 136,810 (312)

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
openaire   +5 more sources

Circadian rhythms, cardiac arrhythmias and sudden death

Frontiers in Bioscience-Landmark, 2021
The heart, like most mammalian organs, is influenced by circadian patterns. The suprachiasmatic nucleus in the hypothalamus has a key role in this influence, via various neurohumoral factors, particularly the autonomic nervous system.
Lourdes Vicent, Manuel Martínez-Sellés
doaj   +1 more source

Estimating Day-to-Day Circadian Rhythm in Patients with Severe Acquired Brain Injury at the Beginning of In-Hospital Rehabilitation

Journal of Integrative Neuroscience, 2022
Background: Patients with severe acquired brain injury (sABI) are likely to have a disturbed circadian rhythm in the early phase of neurorehabilitation.
Simon Svanborg Kjeldsen, Iris Brunner, Jørgen Feldbæk Nielsen, Asger Roer Pedersen   +3 more
doaj   +1 more source

Human Circadian Phase Estimation from Signals Collected in Ambulatory Conditions Using an Autoregressive Model [PDF]

, 2013
Phase estimation of the human circadian rhythm is a topic that has been explored using various modeling approaches. The current models range from physiological to mathematical, all attempting to estimate the circadian phase from different physiological ...
Gil, Enrique A, Møst, Els I S, Beersma, Domien G M, Beersma, Domien G. M., Møst, Els I.S., Aubert, Xavier L, Gil, Enrique A.,, Aubert, Xavier L.,, Aubert, Xavier L., Beersma, Domien G.M.,, Most, Els I. S., Gil, Enrique A., Møst, Els I.S.,   +12 more
core   +1 more source

Aging and circadian rhythms [PDF]

Current Opinion in Insect Science, 2015
Circadian clocks are cell-autonomous molecular feedback loops that generate daily rhythms in gene expression, cellular functions, physiological processes and behavior. The mechanisms of circadian clocks are well understood in young fruit flies Drosophila melanogaster, but less is known about how circadian system changes during organismal aging. Similar
Jadwiga M, Giebultowicz, Dani M, Long
openaire   +2 more sources

Circadian rhythm disorders in patients with advanced cancer: a scoping review

Frontiers in Oncology, 2023
Circadian rhythms can be demonstrated in several biomarkers and behavioural activities, with rhythmical patterns occurring roughly over a 24-h period.
Craig Gouldthorpe, Craig Gouldthorpe, Jenny Power, Jenny Power, Andrew Davies, Andrew Davies, Andrew Davies   +6 more
doaj   +1 more source

Voluntary exercise can strengthen the circadian system in aged mice [PDF]

, 2013
Consistent daily rhythms are important to healthy aging according to studies linking disrupted circadian rhythms with negative health impacts. We studied the effects of age and exercise on baseline circadian rhythms and on the circadian system's ability ...
I. Song, Lall, Gurprit S., Biello, S.M., Harrington, Mary E., S. M. Biello, Song, I., M. E. Harrington, Queenan, H., Harrington, M.E., H. Queenan, Lall, G. S., Biello, S. M., Zimmerman, E., Molyneux, P. C., Molyneux, P.C., T. L. Leise, Leise, T.L., E. Zimmerman, G. S. Lall, P. C. Molyneux, Lall, G.S., Leise, T. L.   +21 more
core   +1 more source

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.
Prelle, Ina T.,, Lambooij, E., Korte, S.M., Blokhuis, Harry J., Burgwal, Johan A. van de,, Korte, S. Mechiel, Lambooij, Elbert,, Prelle, Ina T., Blokhuis, H.J., Koolhaas, J.M., van de Burgwal, J.A., Lambooij, Elbert, Blokhuis, Harry J.,, Jong, I.C., de, Koolhaas, Jaap M.,, de Jong, Ingrid C., Burgwal, J.A., van de, Koolhaas, Jaap M., Prelle, I.T., Korte, S. Mechiel,, Jong, Ingrid C. de,, de Jong, I.C., van de Burgwal, Johan A.   +22 more
core   +1 more source

S20098 Affects the Free-Running Rhythms of Body Temperature and Activity and Decreases Light-Induced Phase Delays of Circadian Rhythms of the Rat [PDF]

, 2001
Mammalian endogenous circadian rhythms are entrained to the environmental day-night cycle by light exposure. Melatonin is involved in this entrainment by signaling the day-night information to the endogenous circadian pacemaker. Furthermore, melatonin is
Mocaër, Elisabeth,, Koolhaas, Jaap M.,, Mocaer, E., Strubbe, JH, Koolhaas, JM, Tuma, Jolanda,, Strubbe, Jan H.,, Strubbe, J.H., Tuma, J., Koolhaas, J.M., Tuma, J, Mocaer, E   +11 more
core   +1 more source

Research progress on relationships of circadian rhythm with thyroid function and diseases

环境与职业医学, 2022
Circadian rhythm is a phenomenon of diurnal changes in life activities formed by a transcription-translation feedback loop of biological clock genes affected by external environmental conditions.
Yuping YANG, Qing CHEN, Liwen ZHANG, Shanshan HAN, Niya ZHOU, Yan XU, Jia MING   +6 more
doaj   +1 more source