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[双语] 研究:压力过大或导致老年失忆

发布时间:2011年04月09日 12:14 | 进入复兴论坛 | 来源:国际在线

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  Scientists claim to have solved the mystery of how stress contributes to memory loss in old age.

  科学家近日宣称已找到压力导致老年性失忆的原因。

  Researchers at Edinburgh University found that one receptor was activated by low levels of the stress hormone cortisol, which helped memory. However, once levels of the hormone were too high they spilled over on to a second receptor, activating brain processes which contribute to memory impairment.

  爱丁堡大学的研究人员发现,当压力激素皮质醇水平较低时,一种受体会被激活,从而增强记忆力。而当该激素皮质醇水平太高时,另外一种受体便会受到影响,使得让记忆受损的脑部运作更加激烈。

  When the receptor linked to poor memory was blocked, the memory recall problem was reversed.

  而当与记忆力低下有关的受体功能受阻后,记忆问题不再出现。

  The research helps explain why too much stress over a prolonged period interferes with the normal processes in storing everyday memories.

  该研究有助于解释为何长时间过多压力会干扰日常记忆存储的正常程序。

  The experiment, which was based on older mice, was published in the Journal of Neuroscience.

  该实验以老年鼠为试验对象,日前已刊登于《神经系统科学期刊》。