求翻译：在反射活动中，由单根纤维传入的一次冲动，不能使突触后神经元产生神经冲动，即不能引起反射效应。这是因为单根纤维传入的一次冲动所引起的兴奋性突触后电位很小，只能使神经元的兴奋性提高。但如有许多传入纤维同时传冲动到同一神经元，则在每个突触后膜上所产生的突触后电位可以叠加起来，这个现象叫做空间总和。它会使反射易化。是什么意思？

Reflex activity, the incoming impulses from a single fiber can not make the postsynaptic neuron to generate nerve impulses, that is not caused by the reflection effect. This is because the single fiber inputs an impulse caused by the excitatory postsynaptic potential, the excitability of neurons inc

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In the reflection activity, an impulse which spreads from the simple root textile fiber, after cannot cause the synapse the neuron to have the nerve impulse, namely cannot cause the reflection effect.This is because the simple root textile fiber spreads after an impulse causes the excitability synap

正在翻译，请等待...

正在翻译，请等待...