Results 21 to 30 of about 3,819 (142)

Pacer cell response to periodic Zeitgebers [PDF]

, 2010
Almost all organisms show some kind of time periodicity in their behavior. Especially in mammals the neurons of the suprachiasmatic nucleus form a biological clock regulating the activity-inactivity cycle of the animal.
Beersma, Domien G. M., Broer, Henk W., Efstathiou, Konstantinos, Gargar, Kim A., Hoveijn, Igor   +4 more
core   +5 more sources

Relationship between chronotype and quality of sleep in medical students at the Federal University of Paraiba, Brazil

Sleep Science, 2014
Objective: The aim of this study was to identify chronotypes of medical students at the Federal University of Paraíba (UFPB) and its relationship to quality of sleep, daytime sleepiness, age, sex and season of birth.
Gabriela Lemos Negri Rique, Gilson Mauro Costa Fernandes Filho, Amanda Dantas Cavalcante Ferreira, Rilva Lopes de Sousa-Muñoz   +3 more
doaj   +1 more source

Full moonlight-induced circadian clock entrainment in Coffea arabica [PDF]

, 2020
Background: It is now well documented that moonlight affects the life cycle of invertebrates, birds, reptiles, and mammals. The lunisolar tide is also well-known to alter plant growth and development.
Bertrand, Benoît, Breitler, Jean-Christophe, Dereeper, Alexis, Djerrab, Doaa, Etienne, Hervé, Guittin, Charlie, Leran, Sophie, Pratlong, M., Severac, Dany, Toniutti, Lucile   +9 more
core   +2 more sources

Comparison of cardiovascular response to sinusoidal and constant lower body negative pressure with reference to very mild whole-body heating

Journal of Physiological Anthropology, 2012
Background The purpose of the present study was to compare sinusoidal versus constant lower body negative pressure (LBNP) with reference to very mild whole-body heating.
Ishibashi Keita, Maeda Takafumi, Higuchi Shigekazu, Iwanaga Koichi, Yasukouchi Akira   +4 more
doaj   +1 more source

Hot and hypoxic environments inhibit simulated soccer performance and exacerbate performance decrements when combined. [PDF]

, 2016
The effects of heat and/or hypoxia have been well-documented in match-play data. However, large match-to-match variation for key physical performance measures makes environmental inferences difficult to ascertain from soccer match-play.
Abt, Aldous, Amann, Armatas, Aughey, Balsom, Bartsch, Billaut, Billaut, Borg, Buchheit, Buono, Calbet, Castle, Cheuvront, Cheuvront, Coppel, Coull, Dellal, Dill, Drust, Duffield, Ekblom, Faude, Flouris, Garvican, González-Alonso, Goodall, Gregson, Hillman, Hommel, Lakomy, Levine, Masschelein, Mazzeo, Mohr, Mohr, Mohr, Morales-Alamo, Nassis, Nassis, Nybo, Nybo, Oliver, Périard, Racinais, Racinais, Racinais, Racinais, Ramanathan, Roelands, Sawka, Sawka, Stembridge, Stembridge, Taylor, Taylor, Taylor, Taylor, Thompson, Tonnessen, Vandenbogaerde, West, Wylie, Young, Özgünen   +65 more
core   +5 more sources

Distribution of Chronotypes among a Sample of Iraqi Kurdish Medical Students

Sultan Qaboos University Medical Journal, 2014
Objectives: The aim of this study was to assess the distribution of chronotypes in a sample of Iraqi Kurdish medical students. Methods: A descriptive cross-sectional study was conducted at the Hawler Medical University College of Medicine in Erbil City ...
Awring M. Raoof, Yasin A. Asaad, Tariq S. Al-Hadithi   +2 more
doaj   +2 more sources

Beyond dreams: do sleep-related movements contribute to brain development? [PDF]

, 2010
Conventional wisdom has long held that the twitches of sleeping infants and adults are by-products of a dreaming brain. With the discovery of active (or REM) sleep in the 1950s and the recognition soon thereafter that active sleep is characterized by ...
Mark Blumberg
core   +1 more source

Oscillatory EEG activity during REM sleep in elderly people predicts subsequent dream recall after awakenings [PDF]

, 2019
Several findings underlined that the electrophysiological (EEG) background of the last segment of sleep before awakenings may predict the presence/absence of dream recall (DR) in young subjects.
Bartolacci, Chiara, D'Atri, Aurora, De Gennaro, Luigi, Gorgoni, Maurizio, Mangiaruga, Anastasia, Scarpelli, Serena   +5 more
core   +1 more source

Collective dynamical response of coupled oscillators with any network structure

, 2008
We formulate a reduction theory that describes the response of an oscillator network as a whole to external forcing applied nonuniformly to its constituent oscillators.
A. Pikovsky, A. T. Winfree, E. M. Izhikevich, F. C. Hoppensteadt, Hiroshi Kori, Hiroya Nakao, Kensuke Arai, P. A. Tass, Y. Kuramoto, Yoji Kawamura, Yoshiki Kuramoto   +10 more
core   +1 more source

Evaluation of the effect of time dependent dosing on pharmacokinetic and pharmacodynamics of amlodipine in normotensive and hypertensive human subjects

Clinical and Experimental Hypertension, 2017
In clinical practice, circadian rhythms play a prominent role in pharmacokinetics and cell responses to therapy, hence necessitating in designing a defined protocol for drug administration.
Samira Khodadoustan, Iran Nasri Ashrafi, K Vanaja Satheesh, Chethan Kumar, Shekar HS, Chikkalingaiah S   +5 more
doaj   +1 more source