Potential Circadian Rhythms in Oligodendrocytes? Working Together Through Time

Light, Sleep, and Circadian Rhythms: Together Again

The 24-hour (h) light–dark (LD) cycle is a fundamental characteristic of Earth’s environment and so its powerful influence on the behaviour and physiology of animals and humans that evolved on this planet is not surprising. In addition to influencing the perception of visual images, light coordinates the temporal rhythms of physiology and behaviour by sending signals to structures in the brain ...

Circadian rhythms: PASsing time

Links are being discovered between the circadian clock mechanisms in different species. The Neurospora Frequency protein has a rhythm of abundance and phosphorylation similar to that of the Drosophila Period protein, and Neurospora and mouse clock components, like Period, have 'PAS' domains.

Circadian rhythms.

1997 marks the 25th anniversary of the discovery of the master circadian pacemaker in mammals in the hypothalamic suprachiasmatic nucleus. Remarkable progress has been made over the last 25 years in elucidating the physiological mechanisms involved in the entrainment, generation and expression of circadian rhythms at the cellular and systems levels. The recent discovery and cloning of the first...

Circadian rhythms.

Circadian rhythms are a ubiquitous adaptation of eukaryotic organisms to the most reliable and predictable of environmental changes, the daily cycles of light and temperature. Prominent daily rhythms in behavior, physiology, hormone levels and biochemistry (including gene expression) are not merely responses to these environmental cycles, however, but embody the organism's ability to keep and t...

Circadian rhythms in RA.