Schaerer S, Neumeyer C
Institut für Zoologie III, J. Gutenberg-Universität, Mainz, Germany.
Vision Res. 1996 Dec;36(24):4025-34. doi: 10.1016/s0042-6989(96)00149-6.
The action spectrum of the optomotor response in goldfish was measured to investigate which of the four cone types involved in color vision contributes to motion detection. In the dark-adapted state, the action spectrum showed a single maximum in the range of 500-520 nm, and resembled the rod spectral sensitivity function. Surprisingly, the action spectrum measured in the light-adapted state also revealed a single maximum only, located in the long wavelength range between 620 and 660 nm. A comparison with spectral sensitivity functions of the four cone types suggests that motion detection is dominated by the L-cone type. Using a two colored, "red-green" cylinder illuminated with two monochromatic lights separately adjustable in intensity, it could be shown that motion vision is "color-blind": the optomotor response disappeared whenever "isoluminant" red and green stripes were offered. Under this condition, calculations revealed that the L-cones were only slightly modulated by the "red-green" stimulus.
为了研究参与颜色视觉的四种视锥细胞类型中哪一种对运动检测有贡献，测量了金鱼视动反应的作用光谱。在暗适应状态下，作用光谱在500 - 520纳米范围内有一个单一的最大值，并且类似于视杆细胞光谱敏感性函数。令人惊讶的是，在明适应状态下测量的作用光谱也仅显示一个单一的最大值，位于620至660纳米的长波长范围内。与四种视锥细胞类型的光谱敏感性函数进行比较表明，运动检测主要由L型视锥细胞主导。使用一个用两种强度可单独调节的单色光照明的双色“红 - 绿”圆柱体，可以证明运动视觉是“色盲的”：每当提供“等亮度”的红色和绿色条纹时，视动反应就会消失。在这种情况下，计算表明L型视锥细胞仅受到“红 - 绿”刺激的轻微调制。
