The morphological analysis of brain and nervous systems of dinosaurs and the evolutionary process of the transition from non-avian dinosaurs to birds.

这项研究为阐明从非鸟类恐龙到鸟类的身体和大脑的进化过程以及这些动物的过渡提供了信息数据。具体地说，本研究的一部分集中在大规模的形态上，如嗅觉的嗅球，揭示了生活方式和摄食行为的变化。这一观点对于理解中生代的古生态和食物链以及这些动物之间的生态位竞争是很重要的。卵龙是非鸟类恐龙和鸟类过渡恐龙的一个很好的例子。在这项研究中，我们分析了身体和大脑的形态变化，以讨论卵龙是属于鸟类还是鸟类在这一组中的特征是趋同的。我们的结论是，后者是因为大脑特征更像非鸟类恐龙，展示了非鸟类恐龙到鸟类的复杂历史。在未来的研究中，我们需要在大脑和神经系统的结构方面进行更小的规模，这将为恐龙的进化提供更多的信息。

This study provides informative data to elucidate the evolutionary processes of body and brain from non-avian dinosaurs to birds and the transition of these animals. Specifically, a part of this study focused on large scaled morphology, such as the olfactory bulb for smelling, which reveals the changes of life style and feeding behaviors. This perspective is important to understand the paleoecology and food chain during the Mesozoic and the competition of niches among these animals. Oviraptorosaurs is one of good examples for the transitional dinosaurs between non-avian dinosaurs and birds. In this study, we analyze the changes in body and brain morphology to discuss if oviraptorosaurs belong to birds or avian features in this group is convergent. We concludes that the latter because brain features are more like non-avian dinosaurs, showing complex history of thetransition between non-avian dinosaurs to birds. In the future study, we need to much smaller scale in terms of the structures of brain and nervous system, which will providemore information about the evolution of dinosaurs.