Adult-born granule cells facilitate remapping of spatial and non-spatial representations in the dentate gyrus.

ABSTRACT: Adult-born granule cells (abGCs) have been implicated in memory discrimination through a neural computation known as pattern separation. Here, using in vivo Ca²⁺ imaging, we examined how chronic ablation or acute chemogenetic silencing of abGCs affects the activity of mature granule cells (mGCs). In both cases, we observed altered remapping of mGCs. Rather than broadly modulating the activity of all mGCs, abGCs promote the remapping of place cells' firing fields while increasing rate remapping of mGCs that represent sensory cues. In turn, these remapping deficits are associated with behavioral impairments in animals' ability to correctly identify new goal locations. Thus, abGCs facilitate pattern separation through the formation of non-overlapping representations for identical s

SUBMITTER: Tuncdemir SN 

PROVIDER: S-EPMC10841867 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature