Hupfeld D, Distler C, Hoffmann K-P
Allgemeine Zoologie & Neurobiologie, Ruhr-Universitaet Bochum, Universitaetsstr. 150, ND 7/31, 44780 Bochum, Germany.
Vision Res. 2006 Sep;46(18):2941-8. doi: 10.1016/j.visres.2006.02.020. Epub 2006 May 2.
Albino ferrets contrary to their pigmented conspecifics show no optokinetic nystagmus. Therefore, in this study motion perception was compared between pigmented and albino ferrets (Mustela putorius furo) trained to discriminate between coherently moving random dot patterns and dynamic noise stimuli in a two-alternative forced choice task. Fully coherently versus incoherently moving patterns could be distinguished by ferrets of both phenotypes. Motion coherence thresholds, however, were significantly higher in albinos. These results indicate that albino ferrets are not motion blind as could be expected from their total lack of optokinetic reactions. However, they are severely impaired in global motion perception.
与有色素的同种动物相反，白化雪貂没有视动性眼震。因此，在本研究中，对经过训练以在二选一强制选择任务中区分连贯移动的随机点图案和动态噪声刺激的有色素和白化雪貂（白鼬）的运动感知进行了比较。两种表型的雪貂都能区分完全连贯与不连贯移动的图案。然而，白化雪貂的运动连贯阈值明显更高。这些结果表明，白化雪貂并非如预期的那样因完全缺乏视动反应而存在运动盲。然而，它们在整体运动感知方面严重受损。
