Yoshii M, Dodt E
Max-Planck-Institute for Physiological and Clinical Research, W.G. Kerckhoff-Institute, Bad Nauheim, FRG.
Ophthalmic Res. 1990;22(5):280-6. doi: 10.1159/000267036.
Pattern electroretinograms were recorded to checkerboard stimuli of various check size to both onset-offset pattern and pattern reversal under most similar conditions of contrast and luminance. With onset-offset pattern the amplitude of the p-q and q-r components of the onset response showed a peak for checks of about 20 min of arc (spatial tuning), whereas the offset response was spatially nonselective at high contrast regardless of the luminance level. With pattern reversal the potentials were similar to those after algebraic summation of onset and offset responses both in waveform and check size of peak amplitude at 50 min of arc. From this we conclude that summation of contrast (onset) and luminance (offset) components is responsible for the shift from 20 min of arc (onset tuning) to 50 min of arc (reversal tuning). The study recommends the application of pattern stimuli in an onset-offset mode for studying antagonistic receptive field properties in the human electroretinogram.
在对比度和亮度最相似的条件下，记录了对各种方格大小的棋盘格刺激的图形视网膜电图，包括起始-终止图形和图形反转。对于起始-终止图形，起始反应的p-q和q-r成分的振幅在约20分视角的方格时显示出峰值（空间调谐），而在高对比度下，无论亮度水平如何，终止反应在空间上都是非选择性的。对于图形反转，其电位在波形和50分视角处峰值振幅的方格大小方面，都与起始和终止反应的代数和后的电位相似。由此我们得出结论，对比度（起始）和亮度（终止）成分的总和导致了从20分视角（起始调谐）到50分视角（反转调谐）的转变。该研究建议在起始-终止模式下应用图形刺激来研究人类视网膜电图中的拮抗感受野特性。
