Solidot: 蛇推动了灵长类动物大脑的演化？

Solidot

奇客的资讯，重要的东西

蛇推动了灵长类动物大脑的演化？
http://solidot.org.feedsportal.com/c/33236/f/556826/s/330be1f9/sc/43/l/0L0Ssolidot0Borg0Cstory0Dsid0F370A16/story01.htm
Oct 29th 2013, 12:46

灵长类动物特别怕蛇，他们能迅速识别蛇的特征闪电般的作出反应。对猕猴大脑的研究支持了一项受争议的假说：如果没有蛇，我们所知的灵长类动物永远也不会演化。对前灵长类祖先而言，遭遇毒蛇几乎意味着死亡。一亿年前，爬行动物位于食物链的顶端；四千万年前，蛇已能注入毒药变得更加致命。对早期哺乳动物来说，蛇是永恒的威胁。它们构成的威胁是如此致命，以至于有科学家提出蛇的威胁塑造和驱动了灵长类动物的演化。在发表在PNAS的一项最新研究中，研究人员发现，蛇的图像影响了从未见过蛇的猕猴大脑丘脑枕神经元。丘脑枕神经元被认为有助于集中眼睛注意力识别潜在威胁。This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers. Five Filters recommends: Massacres That Matter - Part 1 - 'Responsibility To Protect' In Egypt, Libya And SyriaMassacres That Matter - Part 2 - The Media Response On Egypt, Libya And SyriaNational demonstration: No attack on Syria - Saturday 31 August, 12 noon, Temple Place, London, UK



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