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Responses of broilers to the near-continuous lighting, constant 16-h lighting, and constant 16-h lighting with a 2-h night interruption
2017, Livestock ScienceCitation Excerpt :Serotonin or 5-hydroxytryptamine (5-HT) is a monoamine neurotransmitter and reported to be a contributor of feeling of well-being and happiness by regulating the mood, appetite, and sleep (Young, 2007). Driven by the photic cycle rather than the circadian rhythm, serotonin is high during the light part of the light-dark cycle in Syrian hamsters (Ferraro and Steger, 1990). In poultry species, no determinate conclusions concerning the expression pattern of serotonin was made because of the controversial observations.
Involvement of 5-HT<inf>3</inf> and 5-HT<inf>4</inf> receptors in the regulation of circadian clock gene expression in mouse small intestine
2014, Journal of Pharmacological SciencesRelationship among latitude, climate, season and self-reported mood in bipolar disorder
2009, Journal of Affective DisordersCircadian rhythms in electric waveform structure and rate in the electric fish Brachyhypopomus pinnicaudatus
2007, Physiology and BehaviorCitation Excerpt :The full utility of this system as a broader vertebrate model hinges on whether the day–night oscillations in EOD waveform are true circadian rhythms, an assertion which has been called into question. The literature does contain examples of similar day–night oscillations entrained by Zeitgebers that have not been controlled in previous studies, e.g., behavioral rhythms that synchronize to a daily temperature oscillation of 0.9 °C [9], or endocrine rhythms that do not free-run in the absence of external entrainment [10,11]. Extensive evidence shows that circadian rhythms synchronize to feeding rhythms [12,13] and that feeding can entrain the molecular clocks in the master oscillators [14,15].
Light/dark cycle manipulation influences mice behaviour in the elevated plus maze
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