科学家建立首张海狮大脑图片
文章来源:未知 文章作者:enread 发布时间:2016-04-28 08:07 字体: [ ]  进入论坛
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Rio is a California sea lion who can solve IQ tests that many people have trouble passing. In fact, she is so smart that scientists at the Long Marine1 Lab at the University of California, Santa Cruz designed a series of tests that prove she is the first animal besides humans that can use basic logic2 (If A=B and B=C then A=C). Rio's display of intelligence is less surprising when you consider the fact that she is a member of one of only four groups of animals that have evolved extremely large brains (weighing more than 1.5 pounds). Along with seals and walruses3, she is part of a group of fin-footed, semiaquatic marine mammals called pinnipeds. The other large-brained groups are humans, elephants and cetaceans (whales and dolphins).
 
Despite considerable evidence of their cerebral4 skills, very little is known about pinniped brains. However, a team of neuroscientists at Vanderbilt University has taken an important step toward rectifying5 this lack of knowledge by conducting the first comprehensive study of the California sea lion's central nervous system, concentrating on the somatosensory system, which is concerned with conscious perception of touch, pressure, pain, temperature, position and vibration6.
 
Last year, the dramatic upsurge of juvenile7 California sea lion deaths due to strandings throughout central and southern California made it possible for Sawyer to obtain two juvenile sea lion brains for study. (Sea lions, like all marine mammals, are protected by the federal government under the Marine Mammal Protection Act of 1972.)
 
The results of their study are described in the paper "Somatosensory brain stem, thalamus and cortex of the California sea lion (Zalophus californianus)" published online in the early view of the Journal of Comparative Neurology.


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1 marine 77Izo     
adj.海的;海生的;航海的;海事的;n.水兵
参考例句:
  • Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
  • When the war broke out,he volunteered for the Marine Corps.战争爆发时,他自愿参加了海军陆战队。
2 logic j0HxI     
n.逻辑(学);逻辑性
参考例句:
  • What sort of logic is that?这是什么逻辑?
  • I don't follow the logic of your argument.我不明白你的论点逻辑性何在。
3 walruses 617292179d7a1988bfff06ba7b4f606b     
n.海象( walrus的名词复数 )
参考例句:
  • Walruses have enormous appetites and hunt for food almost constantly. 海象食欲极大,几乎一直在猎取食物。 来自互联网
  • Two Atlantic walruses snuggle on an ice floe near Igloolik, Nunavut, Canada. 加拿大努勒维特伊格卢利克附近,两头大西洋海象在浮冰上相互偎依。 来自互联网
4 cerebral oUdyb     
adj.脑的,大脑的;有智力的,理智型的
参考例句:
  • Your left cerebral hemisphere controls the right-hand side of your body.你的左半脑控制身体的右半身。
  • He is a precise,methodical,cerebral man who carefully chooses his words.他是一个一丝不苟、有条理和理智的人,措辞谨慎。
5 rectifying 93741cb43328d77343c113e8ef08eea9     
改正,矫正( rectify的现在分词 ); 精馏; 蒸流; 整流
参考例句:
  • James Gregory gave in in his "Geometriae Pars Universalis" a method of rectifying curves. James Gregory在他的《几何的通用部分》中给出了计算曲线长度的方法。
  • Significant progress was made in rectifying and standardizing nonbank financial institutions. 整顿和规范非银行金融机构取得重要进展。
6 vibration nLDza     
n.颤动,振动;摆动
参考例句:
  • There is so much vibration on a ship that one cannot write.船上的震动大得使人无法书写。
  • The vibration of the window woke me up.窗子的震动把我惊醒了。
7 juvenile OkEy2     
n.青少年,少年读物;adj.青少年的,幼稚的
参考例句:
  • For a grown man he acted in a very juvenile manner.身为成年人,他的行为举止显得十分幼稚。
  • Juvenile crime is increasing at a terrifying rate.青少年犯罪正在以惊人的速度增长。
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