Tang Shiming, Wolf Reinhard, Xu Shuping, Heisenberg Martin
Institute of Biophysics Academia Sinica, 15 Datun Road, Chaoyang, Beijing 100101, P.R. China.
Science. 2004 Aug 13;305(5686):1020-2. doi: 10.1126/science.1099839.
Vision relies on constancy mechanisms. Yet, these are little understood, because they are difficult to investigate in freely moving organisms. One such mechanism, translation invariance, enables organisms to recognize visual patterns independent of the region of their visual field where they had originally seen them. Tethered flies (Drosophila melanogaster) in a flight simulator can recognize visual patterns. Because their eyes are fixed in space and patterns can be displayed in defined parts of their visual field, they can be tested for translation invariance. Here, we show that flies recognize patterns at retinal positions where the patterns had not been presented before.
视觉依赖于恒常性机制。然而，人们对这些机制了解甚少，因为在自由移动的生物体中很难对其进行研究。其中一种机制，即平移不变性，使生物体能够识别视觉模式，而与它们最初看到这些模式时在视野中的区域无关。飞行模拟器中的拴系果蝇（黑腹果蝇）能够识别视觉模式。由于它们的眼睛在空间中是固定的，并且模式可以显示在它们视野的特定部分，因此可以对它们进行平移不变性测试。在这里，我们表明果蝇能够在之前未呈现过模式的视网膜位置识别模式。
