Mapping sequence structure in the human lateral entorhinal cortex

eLife

Christian F Doeller¹  Lorena Deuker²  Jacob LS Bellmund³ 

[1] Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Netherlands;Kavli Institute for Systems Neuroscience, Norwegian University of Science and Technology, Trondheim, Norway;Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany;

关键词: episodic memory;    entorhinal cortex;    fMRI;    time;    virtual reality;    memory;   

DOI  :  10.7554/eLife.45333

来源: DOAJ

【 摘 要 】

Remembering event sequences is central to episodic memory and presumably supported by the hippocampal-entorhinal region. We previously demonstrated that the hippocampus maps spatial and temporal distances between events encountered along a route through a virtual city (Deuker et al., 2016), but the content of entorhinal mnemonic representations remains unclear. Here, we demonstrate that multi-voxel representations in the anterior-lateral entorhinal cortex (alEC) — the human homologue of the rodent lateral entorhinal cortex — specifically reflect the temporal event structure after learning. Holistic representations of the sequence structure related to memory recall and the timeline of events could be reconstructed from entorhinal multi-voxel patterns. Our findings demonstrate representations of temporal structure in the alEC; dovetailing with temporal information carried by population signals in the lateral entorhinal cortex of navigating rodents and alEC activations during temporal memory retrieval. Our results provide novel evidence for the role of the alEC in representing time for episodic memory.

【 授权许可】

Unknown