Mnemonic construction and representation of temporal structure in the hippocampal formation.

Mnemonic construction and representation of temporal structure in the hippocampal formation.
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DOI:
10.1038/s41467-022-30984-3
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发表时间:
2022-06-23
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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大脑前叶-内嗅区支持对情节细节的记忆,如连续事件的时间关系,以及结合推理经验的记忆结构。然而,目前尚不清楚海马事件记忆是否反映了来自记忆结构,事件顺序或流逝时间的时间关系,以及这些序列表示是否概括了相似序列的时间关系。在这里,参与者通过使用不常见的线索和他们的经历来记忆从多个序列中构建事件的时间。学习后,前海马中的事件表征反映了基于构建时间的时间关系。时间关系概括了整个序列,揭示了不同的代表性格式的事件,从相同或不同的序列。从不同的序列中抽象出的关于时间模式的结构知识,使特定事件时间的构建产生偏差。这些发现表明,记忆结构和关系知识的概括联合收割机结合在海马体中,与情节细节和结构知识的情景模拟一致。海马的活动模式类似于学习事件序列的时间关系。在这里,作者表明,这些关系记忆出现通过助记符的建设,并概括为反映时间事件结构。
The hippocampal-entorhinal region supports memory for episodic details, such as temporal relations of sequential events, and mnemonic constructions combining experiences for inferential reasoning. However, it is unclear whether hippocampal event memories reflect temporal relations derived from mnemonic constructions, event order, or elapsing time, and whether these sequence representations generalize temporal relations across similar sequences. Here, participants mnemonically constructed times of events from multiple sequences using infrequent cues and their experience of passing time. After learning, event representations in the anterior hippocampus reflected temporal relations based on constructed times. Temporal relations were generalized across sequences, revealing distinct representational formats for events from the same or different sequences. Structural knowledge about time patterns, abstracted from different sequences, biased the construction of specific event times. These findings demonstrate that mnemonic construction and the generalization of relational knowledge combine in the hippocampus, consistent with the simulation of scenarios from episodic details and structural knowledge. Activity patterns in the hippocampus resemble temporal relations of learned event sequences. Here, the authors show that these relational memories arise through mnemonic construction and are generalized to reflect the temporal event structure.
DOI: 10.3389/fpsyg.2013.00328
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