the rake是什么生物？
社会奇闻 2023-03-15 18:11www.188915.com奇闻趣事
1、the rake是什么意思
Closer to us humans, some animal experiments have begun mimicking the effects of schooling on the brain. What happens hen a monkey learns letters, numbers, or ho to use tools? Japanese researcher Atsushi Iriki shoed that a monkey could learn to use a rake to collect pieces of food that ere placed too far aay to be grabbed by hand. After a fe thousand tests, the animal became as quick as an experienced casino croupier: it took him only a fe tenths of a second to rake in each food morsel, ith a flick of the rist. The monkey even figured out ho to use a medium-size rake to pull a second, longer rake to him, in order to reach food placed at a much farther distance! This type of tool learning triggered a hole cascade of changes in the brain. Energy consumption increased in a specifc area of the cortex, the anterior parietal region -the same area that humans use to control hand movements, rite,grab an object,or use a hammer or pliers. Ne genes ere expressed. synapses blossomed dendritic and axonal tree multiplied- -and all these additional connections resulted in a 23 percent increase in cortex thickness in this expert monkey. Whole bundles of coions also underent dramatic alterations:axons ing from a distant region, at the junction ith the temporal cortex,gre several millimeters and invaded a part of the anterior parietal region hich previously had no connections to these neurons.更接近我们人类，一些动物实验开始模拟学校教育对大脑的影响。当一只猴子学会字母、数字，或者如何使用工具的时候，会发生什么？日本研究人员Atsushi Iriki 表明一只猴子能学会使用耙子抓取被放置得太远，以至于手够不到的食物。经过几千次测验后，猴子会变得像经验丰富的赌场总管一样迅速只需要几十分之一秒，它轻轻一挥手腕，就能捞取每一块食物。猴子甚至知道如何用中等大小的耙子去拨拉过来第二个，更长一点的耙子，目的就是为了够到放置得更远距离的食物。这种工具的学习激发了大脑一连串的改变。大脑皮层特定区域增加了能量消耗，前顶叶区域--人类同样使用这个区域控制手部运动、写字、抓取物品，或使用锤子或钳子。新基因被表达。突触开花发育成树突状，轴突树繁殖起来--所有这些额外的连接导致这种专家型猴子的大脑皮层增加了23%的厚度。整个连接束也发生了戏剧性的改变轴突来自一个遥远的区域，在与颞叶皮层的交接处，生长了几毫米，入侵了前顶叶区域的一部分，这一部分以前与这些神经元毫无联系。