视觉诱发电位是用光或’和图象刺激视网膜后在头皮视区记录到的电位,但因它的波幅很小,常被埋没在脑电活动或伪差的背景活动中而不能见到,故需用信号平均(叠加)的电脑技术。把它们由背景活动中抽取出来,由於诱发电位经常在刺激后固定间隔期时出现,而其他活动与刺激无相关性,所以在重复刺激后通过叠加信号处理到多次反应(64次或128次)的代数和,而没有增 Visual evoked potentials are potentials recorded in the scalp optic zone after the retina is stimulated with light or light, but due to its small amplitude, it is often buried in background activity of the brain or pseudo-poor and can not be seen. Therefore, the need to signal average (overlay) of computer technology. They were extracted from the background activity, and since the evoked potentials often appear at regular intervals after stimulation, while other activities are not relevant to the stimuli, they are processed by superimposing the signal to multiple reactions (64 or 128 ) Algebraic sum, without increasing