在另一组测试中,研究人员让这些动物在一个无法逃脱的容器内游泳。
Bacteria-fed mice attempted to swim for longer than the others before they gave up and hadto be rescued.
在这些小鼠放弃游泳并不得不被救出之前,李糖乳杆菌喂养的小鼠试图游泳的时间比其它小鼠更长。
Such persistence is usually interpreted by students of rodent behaviour as evidence of amore positive mood.
这种持久性经常被研究啮齿类动物行为的学生解释为更积极情绪的证据。
Direct measurements of the animals brains supported the behavioural results.
对这些动物大脑的多次直接测量结果支持了行为学方面的效果。
Levels of corticosterone, a stress hormone, were markedly lower in the bacteria-fed micethan they were in the control group when both groups were exposed to stressfulsituations.
当两组小鼠进行应激实验时,喂食李糖乳杆菌的小鼠体内的应激激素皮质甾酮含量比那些对照组的小鼠体内要明显低地多。
The number of receptors for gamma-aminobutyric acid, a natural chemical messenger thathelps dampen the activity of certain nerve cells, varied in statistically significant waysbetween the brains of the two groups, with more in some parts of the treated animals brainsand fewer in others.
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