Spatio-temporal organization of network activity patterns in the hippocampus.

Lopes-Dos-Santos V., Brizee D., Dupret D.

Understanding how coordinated neural networks support brain functions remains a central goal in neuroscience. The hippocampus, with its layered architecture and structured inputs to diverse cell populations, is a tractable model for dissecting operating microcircuits through the analysis of electrophysiological signatures. We investigated hippocampal network patterns in behaving mice by developing a low-dimensional embedding of local field potentials recorded along the CA1-to-dentate gyrus axis. This embedding revealed layer-specific gamma profiles reflecting spatially organized rhythms and their associated principal cell-interneuron firing motifs. Moreover, firing behaviors along the CA1 radial axis distinguished between deep and superficial principal cells, as well as between interneurons from the pyramidal, radiatum, and lacunosum-moleculare layers. These findings provide a comprehensive map of spatiotemporal activity patterns underlying hippocampal network functions.

DOI

10.1016/j.celrep.2025.115808

Type

Journal article

Publication Date

2025-06-24T00:00:00+00:00

Volume

44

Keywords

CP: Neuroscience, firing motifs, hippocampus, network activity, neuronal populations, oscillations, Animals, Hippocampus, Mice, Nerve Net, Interneurons, Action Potentials, CA1 Region, Hippocampal, Male, Mice, Inbred C57BL, Pyramidal Cells

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