Scientists claim to have solved the mystery of how stress contributes to memory loss in old age.
Researchers at Edinburgh University have shown how two receptors in older brains react to the stress hormone cortisol, which has been linked to memory loss in the elderly.
科学家们表明他们已经揭开了压力如何导致老年记忆衰退之秘。爱丁堡大学的研究者解释了两个老化的大脑感受器如何对应激激素皮质醇作出反应,这跟老年记忆衰退有关。
The study found that one receptor was activated by low levels of cortisol, which helped memory.
研究发现一个感受器被低水平的皮质醇所激活,有助于记忆力。
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.
然而,一旦激素水平过高,就会溢出洒向第二个感受器,激活大脑运作导致记忆障碍。
When the receptor linked to poor memory was blocked, the memory recall problem was reversed.
当连接到健忘的感受器被阻塞,记忆恢复问题就会被改变。
The experiment based on older mice navigating a maze, was published in the Journal of Neuroscience.
The research helps explain why too much stress over a prolonged period interferes with the normal processes in storing everyday memories.
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