Researchers studying rat and monkey brains found that by placing the sensitive tip of an electrode near a neuron they could pick up the sudden changes in the electric field that occurred when signals coursed through the cell 研究大鼠与猴子大脑的人员发现，将电极的敏感尖端放在一神经元附近，他们能检测到信号迅速穿过神经元时电场发生的突然变化。
