在多数神经，有输入或感觉神经纤维和传出或马达纤维。
In most nerves, there are both afferent or sensory nerve fibers and efferent or motor fibers.
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.
尺骨神经沿着这条路线，在大多数位置都隐藏在肌肉和其他组织的里面。
In most spots along this route the ulnar nerve stays hidden within muscles and other tissue.
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