朴槿惠下台后韩国大选拉开帷幕 攻防战一触即发
Abstract
In the visual cortex of the brain, long-ranging tangentially oriented axon collaterals interconnect regularly spaced clusters of cells. These connections develop after birth and attain their specificity by pruning. To test whether there is selective stabilization of connections between those cells that exhibit correlated activity, kittens were raised with artificially induced strabismus (eye deviation) to eliminate the correlation between signals from the two eyes. In area 17, cell clusters were driven almost exclusively from either the right or the left eye and tangential intracortical fibers preferentially connected cell groups activated by the same eye. Thus, circuit selection depends on visual experience, and the selection criterion is the correlation of activity.
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百度 陈先达认为，马克思主义理论工作者不能只摆弄纯粹的哲学概念，不当超凡脱俗的哲学家。View all access options to continue reading this article.
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Science
Volume 255 | Issue 5041
10 January 1992
10 January 1992
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? 1992.
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Published in print: 10 January 1992
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