Buschbeck E K, Strausfeld N J
Department of Ecology and Evolutionary Biology, University of Arizona, Tucson 85721, USA.
J Neurosci. 1996 Aug 1;16(15):4563-78. doi: 10.1523/JNEUROSCI.16-15-04563.1996.
The Hassenstein-Reichardt autocorrelation model for motion computation was derived originally from studies of optomotor turning reactions of beetles and further refined from studies of houseflies. Its applicaton for explaining a variety of optokinetic behaviors in other insects assumes that neural correlates to the model are principally similar across taxa. This account examines whether this assumption is warranted. The results demonstrate that an evolutionarily conserved subset of neurons corresponds to small retinotopic neurons implicated in motion-detecting circuits that link the retina to motion-sensitive neuropils of the lobula plate. The occurrence of these neurons in basal groups suggests that they must have evolved at least 240 million years before the present time. Functional contiguity among the neurons is suggested by their having layer relationships that are independent of taxon-specific neurons, or the absence of orientation-specific motion-sensitive levels in the lobula plate.
用于运动计算的哈森斯坦-赖夏特自相关模型最初源自对甲虫视动转向反应的研究，并通过对家蝇的研究进一步完善。其用于解释其他昆虫各种视动行为的应用假设，该模型的神经关联在不同分类群中基本相似。本研究探讨了这一假设是否合理。结果表明，一个进化上保守的神经元子集对应于参与将视网膜与小叶板的运动敏感神经纤维相连的运动检测回路的小视网膜拓扑神经元。这些神经元在基部类群中的出现表明，它们至少在距今2.4亿年前就已经进化出来了。神经元之间的功能连续性表现为它们具有独立于分类群特异性神经元的层级关系，或者小叶板中不存在方向特异性运动敏感水平。
