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response to light is not instantaneous. It also may explain why certain stimuli (neuropeptide Y or novel wheel running) administered many minutes after light exposure are able to block light - induced phase ...
1. Light ‐ induced phase shifts of the circadian rhythm of wheel‐running activity were used to measure the photic sensitivity of a circadian pacemaker and the visual pathway that conveys light ...
). In these studies, infected rabbits frequently demonstrated a reduction in SWS at the of dark onset, and the phase of SWS suppression generally developed the dark portion of the circadian cycle. However, all rabbits ...
-shifting effect of a 15-min light pulse was examined on the two activity components of the splitting rhythm. There were significant differences in the amount of light - induced phase response between the two ...
While measuring action spectra for phase -shifting the circadian clock of Chlamydomonas, we observed that light pulses started near the phase response curve (PRC) "breakpoint" caused a reduction ...
, but the repolarization phase is eliminated in low Ca2+/EGTA seawater and is reduced in 5 mM Ni2+. The same treatments produce greater tonic depolarizations in response to light at night, and also block the light induced ...
at midtimes of a “dark” and a “ light ” phase of the pre-set fixed circadian rhythm. The magnitude of the pain reaction was estimated indirectly, according to characteristics of locomotion of the animal ...
The mammalian circadian clock resides in neurons of the hypothalamic suprachiasmatic nucleus (SCN). Light entrains phase resetting of the clock using the retino-hypothalamic tract, via release ...
the early biological night and that both the phase resetting response to light and the acute suppressive effects of light on plasma melatonin follow a logistic dose‐ response curve, as do many circadian ...
Mammalian circadian rhythms are phase ‐adjusted and amplified by external cues such as light and food. While the light input pathway via the central clock, the suprachiasmatic nucleus, has been well ...
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