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Maffi和Fiorentini曾报道图象视诱发电位发源于视网膜神经节细胞层。而闪光视诱发电位则认为是发源于别处。视诱发电位的发源位置仍有争议。一些学者警告:脑皮质电位可干扰ERG。虽然图象视诱发电位在头皮的分布已广泛的研究过,但尚无人研究其在面部的空间分布。作者用16通道记录系统研究正常受试者和两名眼异常者,试图证实面部视诱发电位的布局,制出等电位图。并且排除了脑皮质电位的干扰。用电视屏幕显示黑白方格图象,作为视刺激,共测试8名正常,1名视神经病患者和1名失去一眼者。受试者距刺激屏90cm注视屏中央20′大小
Maffi and Fiorentini have reported that the image evoked potentials originate in the retinal ganglion cell layer. The flash visual evoked potential is thought to originate elsewhere. Depending on the location of the origin of evoked potentials is still controversial. Some scholars warn: Cortical potential can interfere with ERG. Although the distribution of visual evoked potential in the scalp has been extensively studied, no one has ever studied its spatial distribution in the face. The authors used a 16-channel recording system to study normal subjects and two abnormal eyes in an attempt to confirm the layout of the facial visual evoked potential and create an equipotential plot. And ruled out the interference of cerebral cortex potential. A black and white checkered image was displayed on the TV screen, and as a visual stimulus, a total of 8 normal subjects, 1 optic neuropathy patient and 1 person who lost one eye were tested. The subjects were 90 cm from the stimulating screen to view the central 20 ’size of the screen