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Hippocampal Pallium and Map-Like Memories through Vertebrate Evolution

机译:脊椎动物进化过程中的海马大脑皮层和类似地图的记忆

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The hippocampus in humans and other mammals is essential for episodic and relational memories. Comparative evidence indicates that a hippocampal pallium homologue is present in birds, reptiles, amphibians, ray-finned fishes, cartilaginous fishes and agnathans. Some of their characteristics, such as the topological position and the pattern of connectivity, appear remarkably well conserved. We review here substantial data showing that in all the vertebrate groups studied up to date, from fish to mammals, the hippocampus plays a fundamental role in spatial memory. In these vertebrates groups, the hippocampal pallium homologue is involved in the use of map-like, relational representations of the objective space that provide stable allocentric frames of reference, thus allowing flexible navigation. These similarities suggest a common evolutionary ancestry and indicate that the functional properties of the hippocampus appear early in the vertebrate phylogenesis and are retained through the independent evolution of the vertebrate lineages.
机译:人类和其他哺乳动物的海马体对于情景记忆和关系记忆至关重要。比较证据表明,鸟类,爬行动物,两栖动物,鱼鳍鱼,软骨鱼和蛇棘鱼中存在海马palpal同源物。它们的某些特征,例如拓扑位置和连接模式,看起来非常保守。我们在这里回顾了大量数据,这些数据表明,在迄今为止研究的所有脊椎动物群体中,从鱼类到哺乳动物,海马在空间记忆中都起着重要作用。在这些脊椎动物群体中,海马区皮层同源物参与了目标空间的地图状关系表示的使用,这些关系表示提供了稳定的异心参照系,因此可以灵活导航。这些相似性暗示了共同的进化祖先,并表明海马的功能特性在脊椎动物的系统发育早期出现,并通过脊椎动物谱系的独立进化得以保留。

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