Monday, 16 September 2013
Brain Rhythms: The Oscillations That Bind
Most of the neurons in the human brain emit nerve impulses (also known as action potentials) at a specific frequency, which may vary from just a few per second to several hundred per second. The chaotic brain activity revealed by an electroencephalogram (EEG) reflects the summing of all these oscillations in the billions of neurons in the brain.
Not so long ago in the history of neuroscience, the chaotic nature of all these oscillations caused them to be regarded as background noise and given little attention, or even dismissed as an epiphenomenon of no importance. But times have changed. The temporal dimension of brain activity, as expressed by these brain rhythms, is now central to neuroscientific research on complex topics such as sleep and consciousness. (more…)
The Emergence of Consciousness | Comments Closed
Monday, 9 September 2013
Why You Can Have No More Than About 150 Real Friends
So you’re proud that you have 500, or maybe even 1000, friends on Facebook? Sorry to tell you, but you probably have far fewer, if we are to believe Robin Dunbar, a professor of evolutionary anthropology at Oxford University in the United Kingdom. As few as 150, in fact: this is the famous “Dunbar’s number”, a limit of about 150 people above and beyond which it is supposed to be impossible to maintain true friendships. (more…)
Evolution and the Brain | Comments Closed
Wednesday, 28 August 2013
A Recent Update of our Fundraising Campaign
Well, the on-line donation system to let our readers help fund The Brain from Top to Bottom is still up and running. To learn more about why we have turned to you to help meet our budget, and how you can make a donation, please read the column to the right.
Here is a recent update of our fundraising campaign.
August 26, 2013
In the first two weeks of the fundraising campaign that we began in April 2013, we raised nearly $2 500. Since then, we have raised another $1 750, for a total of $4 250, and we want to say many thanks again to all of you who have contributed. Thanks to your generosity, we expect to be able to keep this web site operating and to keep adding new posts to the French and English blogs.
But to start producing new content on new topics for the site itself, we will have to have more funding. We are still making every effort to secure ongoing funding from major institutions, but that is a lengthy process, and we can’t be sure whether or when it will succeed. In the meantime, contributions from readers like you will continue to be the lifeblood for our efforts, and we hope that you will chip in as much as you can.
From the Simple to the Complex | Comments Closed
Wednesday, 14 August 2013
A Monthly Podcast On Cognitive Science
Do you love in-depth interviews with famous names in the vast field of cognitive science? Does the idea of spending an hour with philosopher Patricia Churchland, neurobiologist Christof Koch, or affective neuroscientist Jaak Panksepp sound pretty good to you? Then you have to take a look at the web site Brain Science Podcast!
Brain Science Podcast was created in 2006 by Dr. Ginger Campbell, an emergency physician with a passionate interest in the brain, consciousness, and the medical implications of the mind-body relationship, and she has been hosting it ever since. From one month to the next, she alternates between interviews with scientists who are leaders in their fields and detailed reports on recent books on topics in which she is interested. (more…)
From Thought to Language | Comments Closed
Tuesday, 6 August 2013
“Centres” of Cognitive Functions in the Brain: A Misleading Concept
The media nowadays often publish reports that scientists using brain-imaging technology have just discovered the brain’s “centre” for anger, jealousy, generosity, or some other specific emotion or cognitive function. But the idea of such a centre is, at best, an outrageous oversimplification, and at worst, completely misleading.
That is the argument made by Dr. William A. Cunningham in the February 2012 issue of the journal Current Directions in Psychological Science. His article deconstructs a very limited view of a part of the brain called the amygdala,which the popular press often describes as the brain’s “fear centre”. (more…)
Emotions and the Brain | Comments Closed