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Features of the Human Rod Bipolar Cell ERG Response During Fusion of Scotopic Flicker

机译：异位闪烁融合过程中人杆双极细胞ERG反应的特征。

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摘要

The ability of the eye to distinguish between intermittently presented flash stimuli is a measure of the temporal resolution of vision. The aim of this study was to examine the relationship between the features of the human rod bipolar cell response (as measured from the scotopic ERG 6-wave) and the psychophysically measured critical fusion frequency (CFF). Stimuli consisted of dim (~0.04 Td ? s), blue flashes presented either singly, or as flash pairs (at a range of time separations, between 5 and 300 ms). Single flashes of double intensity (~0.08 Td ? s) were also presented as a reference. Visual responses to flash pairs were measured via (1) recording of the ERG ?-wave, and (2) threshold determinations of the CEF using a two-alternative forced-choice method (flicker vs. fused illumination). The results of this experiment suggest that ?-wave responses to flash pairs separated by <100 ms are electrophysiologically similar to those obtained with single flashes of double intensity. Psychophysically, the percepts of flash pairs < 100 ms apart appeared fused. In conclusion, the visual system's ability to discriminate between scotopic stimuli may be determined by the response characteristics of the rod bipolar cell, or perhaps by the rod photoreceptor itself.
机译：眼睛区分间歇性出现的闪光刺激的能力是视觉时间分辨率的度量。这项研究的目的是检查人杆双极细胞反应的特征（从暗视ERG 6波测量）与心理测量的临界融合频率（CFF）之间的关系。刺激包括暗淡的（〜0.04 Td？s），蓝色的闪烁（单独出现或成对闪烁）（在5到300 ms之间的时间间隔范围内）。还给出了两倍强度的单次闪光（〜0.08 Td？s）作为参考。通过（1）记录ERGα波，以及（2）使用二选强制选择方法（闪烁与融合照明）确定CEF的阈值，来测量对闪光灯对的视觉响应。该实验的结果表明，对间隔小于100 ms的闪光对的α波响应在电生理上类似于用双倍强度的单个闪光获得的响应。从心理上讲，间隔<100 ms的闪光对的感知似乎融合了。总之，视觉系统区分暗室刺激的能力可能取决于杆状双极细胞的反应特性，或者可能取决于杆状感光体本身。

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