منابع مشابه
A human phase-response curve to light.
Using 'classical' experimental protocols, a human phase-response curve (PRC) to a single 3-h bright light pulse has been established. When the light pulse was centred slightly before the time of body temperature minimum, the circadian system delayed, whilst a pulse slightly after the minimum advanced it. Maximum phase shifts were about 2 h. When light pulses over 3 successive cycles were used, ...
متن کاملModulation of Hydra attenuata rhythmic activity: phase response curve.
We investigated the effect of photic stimulation on the frequency of Hydra attenuata column contractions. We used positive or negative abrupt light transitions, single or repetitive light or darkness pulses, and alternation of light and darkness periods. The main results are: (a) The frequency of the contraction pulse trains (CPTs) varies transiently in response to an abrupt variation of the li...
متن کاملThe Phase Response Curve of Reciprocally Inhibitory Model Neurons Exhibiting Anti-Phase Rhythms
The phase response curve (PRC) of a half-center oscillator (HCO), which is formed by a pair of reciprocally inhibitory model neurons that exhibit anti-phase rhythms, is computed and used to identify the underlying mechanism of the HCO. The two distinct mechanisms, “release” and “escape”, give rise to two differently shaped PRCs. We use phase plane analysis to explain why the PRC is shaped diffe...
متن کاملPhotic phase response curve in Octodon degus: assessment as a function of activity phase preference.
Light exposure during the early and late subjective night generally phase delays and advances circadian rhythms, respectively. However, this generality was recently questioned in a photic entrainment study in Octodon degus. Because degus can invert their activity phase preference from diurnal to nocturnal as a function of activity level, assessment of phase preference is critical for computatio...
متن کاملMulti-pulse phase resetting curve
Giri P. Krishnan,1, 2 Maxim Bazhenov,1 and Arkady Pikovsky2 1Department of Cell Biology and Neuroscience, University of California, Riverside CA, USA 2Department of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany (Dated: May 7, 2014) Abstract In this paper, we introduce and systematically study, in terms of phase response curves (PRC), the effect of a dual pulse excitation ...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2006
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.1332