有规律的体育活动有助于改善脑功能，它不仅可以增加流入大脑的血液，还可以刺激与神经发育有关的激素及神经生长因子的产生。
Regular physical activity may improve brain function, both by increasing blood flow to the brain and stimulating the production of hormones and nerve growth factors involved in neurogenesis.
其他的研究人员还发现血液中的神经生长因子（nerve growth factor，NGF）的等级也在增加。
Other researchers also found blood levels of nerve growth factor, or NGF, also increased.
结论神经生长因子能增加大鼠心肌梗塞后胆碱能神经纤维的密度，可能对心梗有治疗作用。
Conclusion NGF increases the density of the cholinergic fibers in AMI rat and might have the possible effect on the treatment of AMI.
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