Chronobiology

A Blog Around The Clock

Category archives for Chronobiology

There is now a Sleep and Circadian group on Graduate Junction so if you are a student or postdoc in the field, and enough of you join up, we can see if can get some discussions going….

Came to my e-mail inbox: The Harvard Summer School is pleased to announce the addition of a three-day special seminar for teachers in the sciences. Based on the well-known “Chautauqua Seminars” model, there is no cost to participants other than a $50 registration fee. The course is taught by distinguished Harvard faculty and provides an…

Marc Dingman is touching on my own favorite topic: It’s All About Timing: Circadian Rhythms and Behavior And SciCurios goes only millimeters below the suprachiasmatic nucleus: Diabetes Insipidus as a Sequel to a Gunshot Wound of the Head Both posts well worth your time.

Believe it or not, this appears to have something to do with their circadian rhythms! Back in the 1960s and early 1970s, there was quite a lot of research published on the circadian rhythms in earthworms, mostly by Miriam Bennett. As far as I can tell, nobody’s followed up on that work since. I know,…

Light and Time

Two of my SciBlings have recently covered papers that my readers should find interesting: Joseph: Bright Light and Melatonin Treatment Improves Dementia: A study published in JAMA indicates that treatment with bright light alone (1,000 lux), or bright light combined with melatonin, can improve symptoms in patients with dementia. Melatonin alone appeared to have a…

When Clocks Go Bad

Today in PLoS Genetics: a nice review of some interest to my readers: When Clocks Go Bad: Neurobehavioural Consequences of Disrupted Circadian Timing by Alun R. Barnard and Patrick M. Nolan: Progress in unravelling the cellular and molecular basis of mammalian circadian regulation over the past decade has provided us with new avenues through which…

In the Journal of Circadian Rhythms: A new approach to understanding the impact of circadian disruption on human health (pdf): Background Light and dark patterns are the major synchronizer of circadian rhythms to the 24-hour solar day. Disruption of circadian rhythms has been associated with a variety of maladies. Ecological studies of human exposures to…

I was wondering what to do about the Classic Papers Chellenge. The deadline is May 31st, and I am so busy (not to mention visiting my dentist twice week which incapacitates me for the day, pretty much), so I decided to go back to the very beginning because I already wrote about it before and…

No matter how cutesy the acronim SAD is. Joseph reports on a study that links SAD to serotonin. But serotonin itself may not be necessary to understand how SAD works, though an intimate link between serotonin and melatonin (the former is the biochemical precursor of the latter) suggests that serotonin should be looked at in…

The Amplitude Problem

If you are one of the few of my readers who actually slogged through my Clock Tutorials, especially the difficult series on Entrainment and Phase Response Curves, you got to appreciate the usefulness of the oscillator theory from physics in its application to the study of biological clocks. Use of physics models in the study…