Liu Gang, Seiler Holger, Wen Ai, Zars Troy, Ito Kei, Wolf Reinhard, Heisenberg Martin, Liu Li
State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, China.
Nature. 2006 Feb 2;439(7076):551-6. doi: 10.1038/nature04381.
The fly Drosophila melanogaster can discriminate and remember visual landmarks. It analyses selected parts of its visual environment according to a small number of pattern parameters such as size, colour or contour orientation, and stores particular parameter values. Like humans, flies recognize patterns independently of the retinal position during acquisition of the pattern (translation invariance). Here we show that the central-most part of the fly brain, the fan-shaped body, contains parts of a network mediating visual pattern recognition. We have identified short-term memory traces of two pattern parameters--elevation in the panorama and contour orientation. These can be localized to two groups of neurons extending branches as parallel, horizontal strata in the fan-shaped body. The central location of this memory store is well suited to mediate translational invariance.
果蝇能够辨别并记住视觉地标。它会根据少量的模式参数（如大小、颜色或轮廓方向）来分析其视觉环境的选定部分，并存储特定的参数值。与人类一样，果蝇在获取模式（平移不变性）时能够独立于视网膜位置识别模式。我们在此表明，果蝇大脑最中心的部分——扇形体，包含介导视觉模式识别的神经网络的一部分。我们已经确定了两个模式参数的短期记忆痕迹——全景中的高度和轮廓方向。这些可以定位到两组神经元，它们在扇形体中以平行的水平层状延伸分支。这个记忆存储的中心位置非常适合介导平移不变性。
