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151 publications, page 2 of 16
(CSV)
  • Article English OPEN
    Souza, Andressa; Detanico, Bernardo C; Medeiros, Liciane F; Rozisky, Joanna R; Caumo, Wolnei; Hidalgo, Maria Paz L; Battastini, Ana Maria O; Torres, Iraci LS;
    (2011)
    Publisher: Ubiquity Press
    <p>Abstract</p> <p>Background</p> <p>Adenosine 5-triphosphate (ATP) and its breakdown products ADP and adenosine can act as extracellular messengers in a range of biological processes. Extracellular adenine nucleotides are metabolized by a number of enzymes including NT...
  • Article English OPEN
    Trivedi, Amit K; Rani, Sangeeta; Kumar, Vinod;
    (2006)
    Publisher: Ubiquity Press
    <p>Abstract</p> <p>Background</p> <p>A stable and systematic daily change in light levels at dawn and dusk provides the most reliable indicator of the phase of the day. It is likely that organisms have evolved mechanisms to use these twilight transitions as the primary ...
  • Article English OPEN
    Leenaars, Cathalijn H. C.; Drinkenburg, W. H. Pim; Nolten, Christ; Dematteis, Maurice; Joosten, Ruud N. J. M. A.; Feenstra, Matthijs G. P.; De Vries, Rob B. M.;
    (2019)
    Publisher: Ubiquity Press
    Sleep seems essential to proper functioning of the prefrontal cortex (PFC). The role of different neurotransmitters has been studied, mainly the catecholamines and serotonin. Less attention has been paid to the amino acid transmitters and histamine. Here, we focus on th...
  • Article English OPEN
    Ferrante, Andrew; Gellerman, David; Ay, Ahmet; Woods, Kerri Pruitt; Filipowicz, Allan Michael; Jain, Kriti; Bearden, Neil; Ingram, Krista Kenyon;
    (2015)
    Publisher: Ubiquity Press
    Background: Circadian rhythms play an integral role in human behavior, physiology and health. Individual differences in daily rhythms (chronotypes) can affect individual sleep-wake cycles, activity patterns and behavioral choices. Diurnal preference, the tendency toward...
  • Article English OPEN
    Mills, Peter R; Tomkins, Susannah C; Schlangen, Luc JM;
    (2007)
    Publisher: Ubiquity Press
    <p>Abstract</p> <p>Background</p> <p>The effects of lighting on the human circadian system are well-established. The recent discovery of 'non-visual' retinal receptors has confirmed an anatomical basis for the non-image forming, biological effects of light and has stimu...
  • Article English OPEN
    Weidenauer, Corina; Vollmer, Christian; Scheiter, Katharina; Randler, Christoph;
    (2019)
    Publisher: Ubiquity Press
    Differences in daytime preferences can be described on the dimension of morningness-eveningness (continuous) or circadian typology (categorical) and are associated with our physiological functioning, which is reflected in body temperature and cortisol levels in the morn...
  • Article English OPEN
    Chayo, Isaac; Fernandez, Mercedes; Sandor, Samantha; Tartar, Jaime L.;
    (2017)
    Publisher: Ubiquity Press
    Previous work from our laboratory has shown that a measure of attention to emotionally-charged stimuli, the late positive potential (LPP) event related potential (ERP), distinguished neutral from emotional pictures on a baseline day, but not after sleep deprivation. Her...
  • Article English OPEN
    Reghunandanan, Vallath; Reghunandanan, Rajalaxmy;
    (2006)
    Publisher: Ubiquity Press
    <p>Abstract</p> <p>There has been extensive research in the recent past looking into the molecular basis and mechanisms of the biological clock, situated in the suprachiasmatic nuclei (SCN) of the anterior hypothalamus. Neurotransmitters are a very important component o...
  • Article English OPEN
    Lombardo, Paola; Giustini, Marco; Miccoli, Francesco Paolo; Cicolani, Bruno;
    (2011)
    Publisher: Ubiquity Press
    <p>Abstract</p> <p>Background</p> <p>Although most freshwater planarias are well known photonegative organisms, their diel rhythms have never been quantified. Differences in daily activity rhythms may be particularly important for temperate-climate, freshwater planarias...
  • Article English OPEN
    Hower, Isabella M.; Harper, Sara A.; Buford, Thomas W.;
    (2018)
    Publisher: Ubiquity Press
    Human circadian rhythmicity is driven by a circadian clock comprised of two distinct components: the central clock, located in the suprachiasmatic nucleus (SCN) within the hypothalamus, and the peripheral clocks, located in almost all tissues and organ systems in the bo...
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