Episodic memory allows a person to recall and mentally reexperience specific episodes from one’s personal past. Studies of episodic memory are of great significance for the diagnosis and the exploration of the mechanism of memory generation. Most of the current studies focus on certain brain regions and pay less attention to the interrelationship between multiple brain regions. To explore the interrelationship in the brain network, we use an open fMRI dataset to construct the brain functional connectivity and effective connectivity network. We establish a binary directed network of the memory when it is reactivated. The binary directed network shows that the occipital lobe and parietal lobe have the most causal connections. The number of edges starting from the superior parietal lobule is the highest, with 49 edges, and 31 of which are connected to the occipital cortex. This means that the interaction between the superior parietal lobule and the occipital lobe plays the most important role in episodic memory, and the superior parietal lobule plays a more causal role in causality. In addition, memory regions such as the precuneus and fusiform also have some edges. The results show that the posterior parietal cortex plays an important role of hub node in the episodic memory network. From the brain network model, more information can be obtained, which is conducive to exploring the brain’s changing pattern in the whole memory process.

中文翻译：

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视词配对联想学习和情景记忆再激活任务中脑网络连通性的研究

情景记忆允许一个人回忆并在精神上重新体验个人过去的特定情节。情景记忆的研究对于记忆产生机制的诊断和探索具有重要意义。目前的研究大多集中在某些大脑区域，较少关注多个大脑区域之间的相互关系。为了探索大脑网络中的相互关系，我们使用开放的 fMRI 数据集来构建大脑功能连接和有效连接网络。当它被重新激活时，我们建立了一个二元有向记忆网络。二元有向网络显示枕叶和顶叶具有最多的因果联系。从顶上小叶开始的边数最多，有49条边，其中31个与枕叶皮层相连。这意味着顶上小叶和枕叶之间的相互作用在情景记忆中起最重要的作用，而顶上小叶在因果关系中起更重要的作用。此外，楔前叶和梭状回等记忆区域也有一些边缘。结果表明，后顶叶皮层在情景记忆网络中起着枢纽节点的重要作用。从大脑网络模型中，可以获得更多的信息，有利于探索大脑在整个记忆过程中的变化模式。顶上小叶在因果关系中起着更重要的作用。此外，楔前叶和梭状回等记忆区域也有一些边缘。结果表明，后顶叶皮层在情景记忆网络中起着枢纽节点的重要作用。从大脑网络模型中，可以获得更多的信息，有利于探索大脑在整个记忆过程中的变化模式。顶上小叶在因果关系中起着更重要的作用。此外，楔前叶和梭状回等记忆区域也有一些边缘。结果表明，后顶叶皮层在情景记忆网络中起着枢纽节点的重要作用。从大脑网络模型中，可以获得更多的信息，有利于探索大脑在整个记忆过程中的变化模式。