clear
Tuesday, 23 January 2007
Life Begins at...
Share
clear

Touching—very peripherally—on the beginning-of-life issue, here are some interesting comments from neuroscientist George Buzsaki, in a ten-questions interview at the Gene Expression website.  I note, though, that Prof. Buzsaki doesn't really answer the question.

Q6.  Your discussion of the brain's first rhythm could make one feel that we are close to understanding when meaningful cognition begins. Does your knowledge of EEG patterns and their underpinnings influence your thinking about beginning-of-life, end-of-life, or even animal rights debates?

A6.  I believe that cognition begins once the 1/f features of cortical rhythms emerge because this dynamics represents global (i.e., distributed) computation and only structures with these features appear to generate conscious experience. The ontogenetic appearance of 1/f dynamics coincides with the emergence of long-range cortico-cortical projections. In the newborn human the 1/f global feature of the EEG is already present. On the other hand, in preterm babies, depending on the gestation age, long seconds of neuronal silence alternate with short, spatially localized oscillatory bursts (known as "delta brush"), like in sharks and lizards. These localized intermittent cortical patterns in the premature brain, and similar ones in the strictly locally organized adult cerebellum, cannot give rise to conscious awareness, no matter the size. From this perspective, the structure-function relations between the small world network-like features of the cerebral cortex and the resultant global rhythms appear as necessary conditions for awareness. Earlier developmental stages without these properties simply do not have the necessary ingredients of the product we call cognition.

clear
Posted on 01/23/2007 1:57 PM by John Derbyshire
Comments
No comments yet.


Join leaders of the American Middle Eastern community to endorse

Donald J. Trump
for President of the United States

and spend an evening with his foreign policy advisors featuring
Dr. Walid Phares
and other surprise campaign guests.

Monday October 17th

Omni Shoreham Hotel
2500 Calvert Street Northwest
Washington, DC 20008

cocktails at 6pm - dinner at 7pm
Business casual attire

$150 per person / $1500 per table

Sponsored by the American Mideast Coalition for Trump

Buy Tickets

Subscribe

Recent Posts

30-Sep-2016
Mandelstam by the Fence by György Faludy 30-Sep-2016
Slander 30-Sep-2016
Poetry
clear