Some human examples of circannual rhythms have been found in the past, but we tend to be less affected by the seasons than other creatures. You might know more about your circadian rhythm ...

The daily rotation of Earth and its yearly voyage around the Sun marks the natural rhythm of life on the ... (day-night and twenty-four hour) and/or circannual (seasons and twelve-month) cycles.

What determines these circannual RA rhythms? Several explanations have been suggested, however, almost all are related to the biological effects exerted by sunlight, and in particular, to vitamin ...

Each type of biological rhythm has a certain name to show how long it lasts: Diurnal (night and day) Circadian (24 hours) Ultradian (less than 24 hours) Infradian/Circalunar (1 month) Circannual ...

NPAS2 and PER2 are linked to risk factors of the metabolic syndrome. J Circadian Rhythms 2009; 7: 5. Article Google Scholar Spiegel K, Leproult R, Van Cauter E . Impact of sleep debt on ...