The ID Report
Post details: Neuroscience: Neurons arranged in "extraordinary precision"
10/29/09
Neuroscience: Neurons arranged in "extraordinary precision"
by Denyse O'Leary
ARN correspondent
In "When Listening to Music, Your Brain Is ‘Moving’ Even If You Are Not," a news release from the Society for Neuroscience (10/15/06), we learn,
One of the best-studied features in orientation maps is known as a pinwheel, a small region in which all orientations are represented in segments that appear to come to a point. "A long-standing question is, 'How are neurons arranged in the pinwheel centers?'" says R.C. Reid, PhD, of Harvard Medical School.and much else.Reid provided the answer by using two-photon calcium imaging, which determines the physiological response of hundreds of cells simultaneously as well as their precise location in the cortical circuit.
"By recording from hundreds to thousands of neurons at each pinwheel center, we demonstrated that pinwheel centers are remarkably well organized," he says.
"Neurons selective to different orientations are arranged in an orderly manner even in the very center," he adds. "There was virtually no mixing of cells with different orientation preferences even at the center. Thus, pinwheel centers truly represent singularities in the cortical map." This finding is suggesting extraordinary precision in the development of cortical circuits.
Ignore all the yap about evolution in the article, which is - as typical - intended to distract attention from the obvious conclusion.
Toronto-based Canadian journalist Denyse O'Leary (www.designorchance.com) is the author of the multiple award-winning By Design or by Chance? (Augsburg Fortress 2004), an overview of the intelligent design controversy. She was named CBA Canada's Recommended Author of the Year in 2005 and is co-author, with Montreal neuroscientist Mario Beauregard, of The Spiritual Brain: A neuroscientist's case for the existence of the soul (Harper 2007).
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