Skrandies W, Baier M
Vision Res. 1986;26(4):577-81. doi: 10.1016/0042-6989(86)90006-4.
In 12 healthy subjects the "light peak" of the electrooculogram was measured following localized stimulation of various retinal locations. Significant differences in "light peak" amplitudes were found between central and peripheral stimulation, and at 10 deg eccentricity the "light peak" amplitudes were significantly larger following upper retinal stimulation than those elicited by lower retinal stimuli. In addition, the "light peak" amplitude produced by upper or lower retinal stimulation behaved differently when test light intensity increased. The upper retinal areas showed consistently a higher sensitivity to light intensity changes than the lower retinal areas. The "light peak" of the EOG is believed to index the rate of retinal metabolism elicited by light stimuli. Our findings show that upper retinal areas display a higher level of light-induced activity reflecting the interaction between the photoreceptors and the retinal pigment epithelium than lower retinal areas. The results are interpreted as a superiority of the upper over the lower retina and are related to other electrophysiological and functional differences between upper and lower retinal areas of man.
在12名健康受试者中，通过对视网膜不同部位进行局部刺激来测量眼电图的“光峰”。发现中央刺激和周边刺激的“光峰”振幅存在显著差异，在偏心度为10度时，视网膜上部刺激后的“光峰”振幅明显大于视网膜下部刺激所引发的振幅。此外，当测试光强度增加时，视网膜上部或下部刺激产生的“光峰”振幅表现不同。视网膜上部区域对光强度变化的敏感性始终高于视网膜下部区域。眼电图的“光峰”被认为可指示光刺激引发的视网膜代谢速率。我们的研究结果表明，与视网膜下部区域相比，视网膜上部区域表现出更高水平的光诱导活性，反映了光感受器与视网膜色素上皮之间的相互作用。这些结果被解释为视网膜上部相对于下部的优越性，并与人类视网膜上部和下部区域之间的其他电生理和功能差异有关。
