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Bora Zivkovic

My scientific specialty is chronobiology (circadian rhythms and photoperiodism), with additional interests in comparative physiology, animal behavior and evolution. I am not an MD so I cannot diagnose and treat your sleep problems. As well as writing this blog, I am also the Online Discussion Expert for PLoS. This is a personal blog and opinions within it in no way reflect the policies of PLoS. You can contact me at: Coturnix@gmail.com

Posts by this author

August 18, 2006
Chossat's Effect in humans and other animalsThis April 09, 2006 post places another paper of ours (Reference #17) within a broader context of physiology, behavior, ecology and evolution. The paper was a result of a "communal" experiment in the lab, i.e., it was not included in anyone's Thesis.…
August 17, 2006
No, not here, but I wrote my first post on my first blog on Wednesday, August 18, 2004. 2144 posts on Science And Politics 220 posts on Circadiana 76 posts on The Magic School Bus 498 posts on A Blog Around The Clock
August 17, 2006
[Slightly edited post from May 04, 2006] Collecting stories has become a really exciting endeavor lately. While writing down people's stories has been done since time immemorial, on stone tablets, clay tablets and papyrus scrolls, the modern technology allows more people to record oral and written…
August 17, 2006
It's a big AIDS week here and I hope you are checking the AIDS at 25 special blog here on scienceblogs.com. There is a lot of good information and opinion there. And then, sometimes there is some fun. Like this one, for instance, which look almost elegant compared to the one under the fold....…
August 17, 2006
Many Commercial Drivers Have Impaired Performance Due To Lack Of Sleep Truck drivers who routinely get too little sleep or suffer from sleep apnea show signs of fatigue and impaired performance that can make them a hazard on the road, according to a major new study by researchers at the University…
August 17, 2006
Snuck into the very end of this, otherwise very interesting article on neurobiology of cephalopods and moths, is this little passage: As for flies, Tublitz outlined a tantalizing question, as yet unanswered, that has continued to take flight out of his lab for the last decade. Scientists for years…
August 17, 2006
Animalcules Volume 1, Issue 11 is up on Snail's Tails. Skeptic's Circle #41 is up on Interverbal
August 17, 2006
This is a summary of my 1999 paper, following in the footsteps of the work I described here two days ago. The work described in that earlier post was done surprisingly quickly - in about a year - so I decided to do some more for my Masters Thesis. The obvious next thing to do was to expose the…
August 17, 2006
This post (written on August 13, 2005) describes the basic theory behind photoperiodism and some experimental protocols developed to test the theory. Timely prediction of seasonal periods of weather conditions, food availability or predator activity is crucial for survival of many species. Although…
August 17, 2006
This post (click on the icon) was originally written on May 07, 2005, introducing the topic of neuroendocrine control of seasonal changes in physiology and behavior. So far, I have directed all my attention to daily - circadian - rhythms, and pretty much ignored other rhythms that correspond to…
August 16, 2006
Different strokes occur at different times Different types of strokes occur most often at different times of day say scientists at Iwate Medical University in Iwate, Japan. The team based their findings on data from 12,957 cases of first-ever stroke diagnosed by CT or MRI scans and drawn from the…
August 16, 2006
I And The Bird #30 is up on Burning Silo. Get your birding blogging thirst quenched today!
August 16, 2006
If you go to the ScienceBlogs front page you will see that The Buzz word of the day is Pluto. And when there is a new Buzz Word, a lot of us tend to post about it - see how many already chimed in on the topic. I am actually quite happy to see the revisions of the definition of a planet. The old 9…
August 16, 2006
Have you heard about the stupid German study that uses evo-psych Just-So-Stories about, supposedly, women losing interest in sex shortly after marriage? I wanted to dissect it when it first came out but Real Life and time-constraints prevented me. In the meantime, Dr.Petra, Shakespeare's Sister,…
August 16, 2006
The third part of the series on authoritarian psychology by Sara Robinson is now up on Orcinus. It tackles the strategies for dealing with (and hopefully healing and converting) the victims of authoritarian upbringing who turned out authoritarian themselves. The whole series is a must-read.
August 16, 2006
KateWD: Eggplants and Exploitation Mr.WD: Talkin' Tut: 'magic' and 'Africans'
August 16, 2006
New Carnival of the Liberals is up on One Flew East.
August 16, 2006
Tangled Bank #60 is up on FrinkTank. History Carnival XXXVII is up on Mode For Caleb. Carnival of Education #80 is up on Education Wonks. The first Carnival of GRADual Progress is up on Fumbling Towards Geekdom.
August 16, 2006
This April 16, 2005 post gives you links to further online resources and literature on entrainment and Phase-Response Curves, as well as a link to a database of PRCs so you can play with them yourself. One of the most useful chronobiological databases available online is the PRC Atlas. Compiled by…
August 16, 2006
This is the sixth post in a series about mechanism of entrainment, running all day today on this blog. In order to understand the content of this post, you need to read the previous five installments. The original of this post was firt written on April 12, 2005. A Phase Response Curve (PRC) can…
August 16, 2006
This is the fifth post in a series about mechanism of entrainment. Orignally written on April 11, 2005. If you look at the Phase Response Curve you made you see that, as you follow the curve through the 24-hour cycle, you first encounter a dead zone during the subjective day (VT0 - CT 12) during…
August 16, 2006
The fourth post in the series on entrainment, originally written on April 10, 2005, explains the step-by-step method of constructing a PRC. After months of applying light pulses to your animals you are ready to analyze and plot your data. You will print out the actographs (see how in the post "On…
August 16, 2006
The third post in the series on entrainment, first written on April 10, 2005, starts slowly to get into the meat of things...As always, clicking on the spider-clock icon will take you to the site of the original post. In the previous post, I introduced the concept of entrainment of circadian…
August 16, 2006
This is the second in a series of posts on the analysis of entrainment, originally written on April 10, 2005. The natural, endogenous period of circadian rhythms, as measured in constant conditions, is almost never exactly 24 hours. In the real world, however, the light-dark cycle provided by the…
August 16, 2006
This post from February 03, 2005 covers the basic concepts and terms on entrainment. Let's now continue our series of Clock Tutorials with an introduction to some phenomena (and related terms and concepts) observed in the laboratory in the course of doing standard circadian experiments. Such…
August 16, 2006
The post coming immediately after this is, as far as I know, the only blog post so far that appeared in the List Of References of a scientific paper. A guideline for analyzing circadian wheel-running behavior in rodents under different lighting conditions by Corinne Jud, Isabelle Schmutz, Gabriele…
August 15, 2006
Fred Stuzman: Blogging: Academia's Digital Divide?: Considering the value my blog has added to my academic experience, I tend to believe that academic blogs will eventually mainstream. Their acceptance will take some time, but the value provided by blogging - in terms of connecting with others, the…
August 15, 2006
Jenna has been nagged by NAAG recently, to the point of obsession. It is also one of the molecules I included in the Synapse puzzle. So, if you want to learn a little bit of nitty-gritty detailed neurochemistry of this exciting (as of recently) neuromodulator (and possibly neurotransmitter), you…
August 15, 2006
The Scian Melt is up on Nonoscience. New carnival of Homeschooling is up on The Common Room.
August 15, 2006
Archy is on top of the story, as usual when the story is about people trying to resurrect mammoths!