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Authors & Affiliations
Azul Silva, Juan Facunda Morici, Avinash Kumar Ranjan, Bryan da Costa Souza, Gabrielle Girardeau
Abstract
Remembering the context in which an aversive experience occurred is critical to safely navigating the environment. The hippocampus (HPC) has been implicated in the encoding of spatial information through the presence of place cells (PC) which are tuned to specific locations in space. As a population, PCs form a “cognitive map” of the environment that adapts to contextual changes through remapping. The dorsal and ventral parts of the hippocampus have different functional implications in spatial coding. While the dorsal HPC mainly processes spatial information, the ventral HPC encodes valence and anxiety. Previous works have focused on dorsal-ventral HPC activity during changes in spatial cues. In this work, we investigated the dorsal-ventral HPC interaction while changing contextual emotional valence. Using electrophysiological datasets in which rats explore the same physical space but driven by different emotional valence, we characterized the spatial and emotional coding of both structures. We found different patterns of spatial tuning between dorsal and ventral HPC depending on the emotional valence associated with the exploration behavior.