ArticleNature neuroscience2025
Voltage imaging reveals hippocampal inhibitory dynamics shaping pyramidal memory-encoding sequences.
Article in Nature neuroscience, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Rapid formation of non-spatial hippocampal representations consistent with behavioral timescale synaptic plasticity is modulated by entorhinal input.Nature communications · 2026Article
- Voltage imaging as a window into neural computation.Neurophotonics · 2026Article
- MiniFAST: a sensitive and fast miniaturized microscope forNeurophotonics · 2026Article
- Kilohertz volumetric imaging of in vivo dynamics using squeezed light field microscopy.Nature methods · 2025Article
- Voltage imaging reveals hippocampal inhibitory dynamics shaping pyramidal memory-encoding sequences.Nature neuroscience · 2025Article
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Abstract
Hippocampal spiking sequences encode and link behaviorally relevant information across time. How inhibition sculpts these sequences remains unclear. We performed longitudinal voltage imaging of CA1 parvalbumin- and somatostatin-expressing interneurons in mice performing an odor-cued working memory task. Unlike pyramidal odor-specific sequences that encode odor and time throughout a delay period, interneurons encoded odor delivery, but not odor identity or delay time. Odor-triggered inhibition was exerted by stable numbers of interneurons across days, with constant cell turnover, independent of task training. At odor onset, brief spiking of parvalbumin interneurons was followed by widespread hyperpolarization and synchronized theta-paced rebound spiking across interneurons. Electrophysiology, optogenetics and calcium imaging corroborated that parvalbumin interneurons silenced most pyramidal cells during odor delivery, whereas somatostatin interneurons suppressed other interneurons. The few odor-selective pyramidal cells spiked together with interneuronal post-hyperpolarization rebound. Collectively, inhibition increases the signal-to-noise ratio of pyramidal cue representations, enabling efficient encoding of memory-relevant information.
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