研究单个神经元兴奋时的电活动,可用细胞外微电极技术进行,这时对微电极的要求是很高的因为引导的特点是要求微电极的尖端比起神经元体或轴突的直径小得多,微电极的尖端细得不致损伤神经元但又能非常接近神经元甚至能紧密地和神经元膜相接触。金属微电极中采用钨丝作材料不仅在直径上能满足这一要求而且也能具备这样一些特点:材料易取、电极电阻低,机械强度高, The study of the electrical activity of a single neuron during excitement can be performed using extracellular microelectrode techniques where the requirements of the microelectrode are high because the guiding feature requires that the tip of the microelectrode be smaller than the diameter of the neuron or axon Much more, the tip of the microelectrode is fine and not injurious to the neuron but can be very close to the neuron and can even come into close contact with the neuronal membrane. The use of tungsten wire as a material in metal microelectrodes not only meets this requirement in terms of diameter, but also has such features as: easy-to-take materials, low electrode resistance, high mechanical strength,