Results 31 to 40 of about 423,011 (334)

The Timing of the Melatonin Onset and Phase Angle to Sleep Onset in Older Adults after Uncontrolled vs. Controlled Lighting Conditions

Clocks & Sleep, 2023
The main aim of this study was to explore how melatonin onset timing and phase angle to bedtime in healthy older adults are impacted by prior light exposure.
Arturo Arrona-Palacios, Jung-Hie Lee, Charles A. Czeisler, Jeanne F. Duffy   +3 more
doaj   +1 more source

Circadian rhythms and hormonal homeostasis: Pathophysiological implications [PDF]

, 2017
Over recent years, a deeper comprehension of the molecular mechanisms that control biological clocks and circadian rhythms has been achieved. In fact, many studies have contributed to unravelling the importance of the molecular clock for the regulation ...
Bruscalupi, Giovannella, Gnocchi, Davide
core   +2 more sources

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

Understanding the role of chromatin remodeling in the regulation of circadian transcription in Drosophila. [PDF]

, 2015
Circadian clocks enable organisms to anticipate daily changes in the environment and coordinate temporal rhythms in physiology and behavior with the 24-h day-night cycle. The robust cycling of circadian gene expression is critical for proper timekeeping,
Chiu, Joanna C, Kwok, Rosanna S, Lam, Vu H   +2 more
core   +1 more source

Human circadian variations [PDF]

Journal of Clinical Investigation, 2021
Circadian rhythms, present in most phyla across life, are biological oscillations occurring on a daily cycle. Since the discovery of their molecular foundations in model organisms, many inputs that modify this tightly controlled system in humans have been identified.
Nicholas W. Gentry, Liza H. Ashbrook, Ying-Hui Fu, Louis J. Ptáček   +3 more
openaire   +4 more sources

COMPASS: Continuous Open Mouse Phenotyping of Activity and Sleep Status [version 2; referees: 3 approved, 1 approved with reservations]

Wellcome Open Research, 2017
Background: Disruption of rhythms in activity and rest occur in many diseases, and provide an important indicator of healthy physiology and behaviour. However, outside the field of sleep and circadian rhythm research, these rhythmic processes are rarely ...
Laurence A. Brown, Sibah Hasan, Russell G. Foster, Stuart N. Peirson   +3 more
doaj   +1 more source

Mutation of Arabidopsis SPLICEOSOMAL TIMEKEEPER LOCUS1 Causes Circadian Clock Defects [PDF]

, 2012
The circadian clock plays a crucial role in coordinating plant metabolic and physiological functions with predictable environmental variables, such as dusk and dawn, while also modulating responses to biotic and abiotic challenges.
Brown, John WS, Harmer, Stacey L, Jones, Matthew A, McNicol, Jim, Simpson, Craig G, Williams, Brian A   +5 more
core   +1 more source

Extraordinary behavioral entrainment following circadian rhythm bifurcation in mice. [PDF]

, 2016
The mammalian circadian timing system uses light to synchronize endogenously generated rhythms with the environmental day. Entrainment to schedules that deviate significantly from 24 h (T24) has been viewed as unlikely because the circadian pacemaker ...
Gorman, Michael R, Harrison, Elizabeth M, Johnson, Jeremy, Poonawala, Qays, Sun, Jonathan, Walbeek, Thijs J   +5 more
core   +2 more sources

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 ...
A Davidson, A Power, A Watanabe, AA Kondratova, AC King, AJ Davidson, AJ Davidson, B Rusak, C Castillo, CJ Guenthner, DE Kolker, DF Swaab, DJ Buysse, DJ Dijk, DJ Foley, DJ Foley, E Satinoff, E. Zimmerman, EK Baehr, F Aujard, G. S. Lall, GJ Tranah, GS Passos, H Albus, H Li, H. Queenan, HT vanderLeest, I. Song, IN Karatsoreos, J Schaap, K Cho, KJ Reid, M Asai, M Harrington, M Münch, M Nagano, M Palomba, M. E. Harrington, MA Grandner, MJ Duncan, MJ Duncan, MU Gillette, MW Greene, MW Marlatt, N Mrosovsky, O Castanon-Cervantes, P. C. Molyneux, PC Yannielli, RD Nebes, S Ancoli-Israel, S Benloucif, S Farajnia, S Kiessling, S Yamazaki, S Yamazaki, S Yamazaki, S. M. Biello, SH Yoo, SJ Aton, SM Biello, T Deboer, T Yoshikawa, T. L. Leise, TA Bedrosian, TA Martino, TA Martino, TJ Nakamura, TL Leise, U Abraham, U Albrecht, VS Valentinuzzi, W Nakamura, Y Tahara, Y Zhang, Y Zhang   +74 more
core   +2 more sources

Accuracy of Three Commercial Wearable Devices for Sleep Tracking in Healthy Adults

Sensors
Sleep tracking by consumers is becoming increasingly prevalent; yet, few studies have evaluated the accuracy of such devices. We sought to evaluate the accuracy of three devices (Oura Ring Gen3, Fitbit Sense 2, and Apple Watch Series 8) compared to the ...
Rebecca Robbins, Matthew D. Weaver, Jason P. Sullivan, Stuart F. Quan, Katherine Gilmore, Samantha Shaw, Abigail Benz, Salim Qadri, Laura K. Barger, Charles A. Czeisler, Jeanne F. Duffy   +10 more
doaj   +1 more source