Word: motorizing
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...hedgehog gene (so called because in its absence, fruit-fly embryos sprout a coat of prickles) diffuses outward from the cells that produce it, becoming fainter and fainter. Columbia University neurobiologist Thomas Jessell has found that it takes middling concentrations of this potent morphing factor to produce a motor neuron and lower concentrations to make an interneuron (a cell that relays signals to other neurons, instead of to muscle fibers, as motor neurons...
...recent finding has intrigued researchers more than the results reported in October by Corey Goodman and his Berkeley colleagues. In studying a deceptively simple problem--how axons from motor neurons in the fly's central nerve cord establish connections with muscle cells in its limbs--the Berkeley researchers made an unexpected discovery. They knew there was a gene that keeps bundles of axons together as they race toward their muscle-cell targets. What they discovered was that the electrical activity produced by neurons inhibited this gene, dramatically increasing the number of connections the axons made. Even more intriguing, the signals...
...listens to a lullaby, tiny bursts of electricity shoot through the brain, knitting neurons into circuits as well defined as those etched onto silicon chips. The results are those behavioral mileposts that never cease to delight and awe parents. Around the age of two months, for example, the motor-control centers of the brain develop to the point that infants can suddenly reach out and grab a nearby object. Around the age of four months, the cortex begins to refine the connections needed for depth perception and binocular vision. And around the age of 12 months, the speech centers...
While driving on Eliot St. Dec. 17, Carlos Ho swerved to avoid a stopped motor vehicle and ran his 1996 Nissan Pathfinder down the Belfour Center's granite staircase...
...style--forming it, giving it meaning--was the "wonderful chaos" of nature, opposed in its plenitude to the merely superficial attractions of what we would now call media culture. "Take long walks and take them often," he advised a young painter, "and try your utmost to avoid the stultifying motor car, which robs you of your vision, just as the movies do, or the numerous motley newspapers. Learn the forms of nature by heart so that you can use them like the musical notes in a composition...