Frumkes T E, Naarendorp F, Goldberg S H
Vision Res. 1986;26(8):1167-76. doi: 10.1016/0042-6989(86)90098-2.
The influence of annular fields on sensitivity to sinusoidal flicker was assessed in the dark adapted parafoveal retina. Test stimuli were 2 degrees 20' in diameter; annuli had a 2 degrees 20' inner and 7 degrees 30' outer diameter. Rod flicker was studied with a "green" stimulus too dim to influence cones. Selective cone flicker was obtained using red and green flicker in counterphase and yoked together in modulation depth and scotopic illuminance. Results showed the following. (1) Annular stimulation of rods slightly facilitated rod-mediated flicker sensitivity to frequencies less than 10 Hz. In contrast, annular stimulation of cones greatly facilitated rod-mediated sensitivity, particularly for flicker frequencies greater than 7 Hz. We designate this effect, cone-rod interaction. (2) Annular stimulation of cones has a negligible influence upon sensitivity to cone-mediated flicker frequencies less than 15 Hz. In contrast, annular stimulation of rods has a large influence upon sensitivity to cone-mediated flicker, an effect we designate rod-cone interaction. (3) Within limits, both rod-cone and cone-rod interaction increase as the annular illuminance increases and as flicker frequency increases; the limiting frequency and illuminance values, however, are different for the two forms of interaction. Results are compared with prior evidence that rod and cone signals summate to produce an absolute threshold or flicker sensation. We suggest that there are at least three mechanisms for interaction between rod- and cone-related signals.
在暗适应的旁中央凹视网膜中评估了环形视野对正弦闪烁敏感度的影响。测试刺激的直径为2度20分；环形物的内径为2度20分，外径为7度30分。使用一种“绿色”刺激来研究视杆细胞闪烁，该刺激太暗以至于不会影响视锥细胞。通过使用反相的红色和绿色闪烁并将它们的调制深度和暗视照度进行匹配，获得了选择性视锥细胞闪烁。结果如下。（1）对视杆细胞的环形刺激略微促进了视杆细胞介导的对频率低于10Hz的闪烁敏感度。相比之下，对视锥细胞的环形刺激极大地促进了视杆细胞介导的敏感度，特别是对于频率大于7Hz的闪烁。我们将这种效应称为视锥 - 视杆细胞相互作用。（2）对视锥细胞的环形刺激对低于15Hz的视锥细胞介导的闪烁频率的敏感度影响可忽略不计。相比之下，对视杆细胞的环形刺激对视锥细胞介导的闪烁敏感度有很大影响，我们将这种效应称为视杆 - 视锥细胞相互作用。（3）在一定范围内，视杆 - 视锥细胞相互作用和视锥 - 视杆细胞相互作用都随着环形照度和闪烁频率的增加而增加；然而，这两种相互作用形式的极限频率和照度值是不同的。将结果与先前关于视杆细胞和视锥细胞信号总和以产生绝对阈值或闪烁感觉的证据进行了比较。我们认为，视杆细胞和视锥细胞相关信号之间至少存在三种相互作用机制。
