Clock Tutorials

A Blog Around The Clock

Category archives for Clock Tutorials

This is an appropriate time of year for this post (February 05, 2006)…

This post was originally written on February 11, 2005. Moving from relatively simple mammalian model to more complex systems.

Oxytocin and Childbirth. Or not.

When teaching human or animal physiology, it is very easy to come up with examples of ubiqutous negative feedback loops. On the other hand, there are very few physiological processes that can serve as examples of positive feedback. These include opening of the ion channels during the action potential, the blood clotting cascade, emptying of…

This February 06, 2005 post describes the basic elements of the circadian system in mammals.

If you really read this blog ‘for the articles’, you know some of my recurrent themes, e.g., that almost every biological function exhibits cycles and that almost every cell in every organism contains a more-or-less functioning clock. Here is a new paper that combines both of those themes very nicely, but I’ll start with a…

This post from February 03, 2005 covers the basic concepts and terms on entrainment. This is also the only blog post to date that I am aware of that was cited in a scientific paper.

You probably realize by now that my expertise is in clocks and calendars of birds, but blogging audience forces me to occasionally look into human clocks from a medical perspective. Reprinted below the fold are three old Circadiana posts about the connection between circadian clocks and the bipolar disorder, the third one being the longest…

I wrote this post back on February 02, 2005 in order to drive home the point that the circadian clock is not a single organ, but an organ system comprised of all cells in the body linked in a hierarchical manner:

As we mentioned just the other day, studying animal behavior is tough as “animals do whatever they darned please“. Thus, making sure that everything is controlled for in an experimental setup is of paramount importance. Furthermore, for the studies to be replicable in other labs, it is always a good idea for experimental setups to…

Clock Tutorial #4: On Methodology

I wrote this post back on January 23, 2005. It explains how clock biologists think and how they design their experiments: