等学者于神经化学研究(Neurochemical Research)期刊中研究出，在脑部外伤后几分钟内，激活毒性的流程就会启动，这个流程与许多神经传导物质的释放与兴奋接受器有关。
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研究者还发现有氧小组成员中他们血液中一种重要的给大脑施肥的化学物质脑源性神经营养因子有了明显的增加。
The researchers also saw a significant increase in that important brain-fertilizing chemical BDNF in the plasma of those in the aerobic exercise group — but not in the control group.
这项研究呼应了之前的发现，化学物质会伤及人体的神经系统，影响到控制体重的系统。
The research echoes previous studies which have shown that the chemicals can cause damage to the system that naturally controls one's body weight.
迄今为止，大多数有关锻炼和焦虑的相互影响的研究都集中在大脑内的各种神经递质或化学信使，如血清素、多巴胺上。
To date, most research into the interplay of exercise and anxiety has focused on the actions of various neurotransmitters or chemical messengers within the brain, like serotonin and dopamine.
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