Bilotta J, Lynd F M, Powers M K
Department of Psychology, Western Kentucky University, Bowling Green 42101, USA.
Vision Res. 1998 Jan;38(1):55-9. doi: 10.1016/s0042-6989(97)00162-4.
The goldfish is an important animal model for retinal processing and for understanding the relationship between retinal structure and function. The purpose of this study was to examine the temporal processing of the visual system of this species. Goldfish were classically conditioned to suppress respiration upon presentation of a sinusoidally flickering stimulus. Temporal contrast sensitivity functions (T-CSFs) were determined by measuring contrast threshold at a variety of temporal frequencies across different mean luminances. Goldfish T-CSFs were found to be similar in shape to those of humans. In addition, as the mean luminance of the stimulus decreased, temporal resolution decreased. This implies that the animal's ability to detect high flicker frequencies decreases as the level of light adaptation decreases, as does that of humans. The results support the notion that temporal processing is similar across vertebrate species, and therefore that the goldfish is a useful model for studying temporal processing in the vertebrate retina.
金鱼是视网膜处理以及理解视网膜结构与功能之间关系的重要动物模型。本研究的目的是检验该物种视觉系统的时间处理能力。金鱼经过经典条件反射训练，在呈现正弦闪烁刺激时抑制呼吸。通过在不同平均亮度下测量各种时间频率的对比度阈值来确定时间对比度敏感度函数（T-CSFs）。发现金鱼的T-CSFs形状与人类的相似。此外，随着刺激的平均亮度降低，时间分辨率也降低。这意味着随着光适应水平降低，动物检测高闪烁频率的能力会下降，人类也是如此。这些结果支持了这样一种观点，即脊椎动物物种的时间处理是相似的，因此金鱼是研究脊椎动物视网膜时间处理的有用模型。
