噪声可以降低阈下膜电位振荡发生的膜电位水平，有利于神经元产生阈下膜电位振荡和放电，从而提高神经元的敏感性。
Noise reduces the level of membrane potential of generating oscillation and firing. Noise helps neuron to generate oscillation and firing, thus improving the sensitivity of neurons.
结论光学记录膜电位方法可以在神经细胞群的水平上直观观察VN神经电活动的时空二维方式及其兴奋性突触传递过程；
Conclusion The study indicated that the use of optical recording for revealing visually the synaptic transmission of afferent input in VN in brainstem was feasible.
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