#hippocampal — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #hippocampal, aggregated by home.social.
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🧠 New paper by Aidan J. Horner (2025, Trends in Cognitive Sciences) introduces a 3D neural #StateSpace for #episodic memories. It replaces linear #SystemsConsolidation models with a dynamic framework where #hippocampal, #neocortical, and episodic specificity dimensions evolve independently and non-linearly, allowing memories to shift, reverse, or re-engage hippocampal circuits.
🌍 https://www.cell.com/trends/cognitive-sciences/fulltext/S1364-6613(25)00284-0
#Neuroscience #CognitiveScience #Hippocampus #CogSci #compneuro #memory
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🧠 New paper by Pedamonti et al. (2025, Nature Comm.) shows that the #hippocampus supports multi-task #ReinforcementLearning under partial observability. Mice flexibly inferred hidden task states 🐁, and only models with recurrent memory reproduced behavior, linking #hippocampal dynamics to #POMDP (Partially Observable Multi-Task Reinforcement Learning) inference.
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📚 New article by Esparza et al. and @LMPrida : Cell-type-specific #manifold analysis discloses independent parallel #SpatialMaps in #hippocampal #CA1. Using #miniscope imaging, they show deep and superficial CA1 #PyramidalNeurons encode position and running direction via distinct ring manifolds, manipulable via #chemogenetics. Fascinating for revealing parallel, cell-type–specific spatial topologies 👌
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📚 New article by Esparza et al. and @LMPrida : Cell-type-specific #manifold analysis discloses independent parallel #SpatialMaps in #hippocampal #CA1. Using #miniscope imaging, they show deep and superficial CA1 #PyramidalNeurons encode position and running direction via distinct ring manifolds, manipulable via #chemogenetics. Fascinating for revealing parallel, cell-type–specific spatial topologies 👌
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📚 New article by Esparza et al. and @LMPrida : Cell-type-specific #manifold analysis discloses independent parallel #SpatialMaps in #hippocampal #CA1. Using #miniscope imaging, they show deep and superficial CA1 #PyramidalNeurons encode position and running direction via distinct ring manifolds, manipulable via #chemogenetics. Fascinating for revealing parallel, cell-type–specific spatial topologies 👌
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📚 New article by Esparza et al. and @LMPrida : Cell-type-specific #manifold analysis discloses independent parallel #SpatialMaps in #hippocampal #CA1. Using #miniscope imaging, they show deep and superficial CA1 #PyramidalNeurons encode position and running direction via distinct ring manifolds, manipulable via #chemogenetics. Fascinating for revealing parallel, cell-type–specific spatial topologies 👌
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📚 New article by Esparza et al. and @LMPrida : Cell-type-specific #manifold analysis discloses independent parallel #SpatialMaps in #hippocampal #CA1. Using #miniscope imaging, they show deep and superficial CA1 #PyramidalNeurons encode position and running direction via distinct ring manifolds, manipulable via #chemogenetics. Fascinating for revealing parallel, cell-type–specific spatial topologies 👌
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📖 Vaidya et al. investigate how #hippocampal #CA1 #PlaceCells form expanding #memory representations over days. Using longitudinal in vivo recordings, they show that stable #PlaceFields progressively emerge as active cells increase their likelihood of remaining active across sessions. This gradual stabilization hinges on #behavioral‑timescale #SynapticPlasticity, offering a new model of how CA1 memories solidify w/o #CatastrophicOverwriting.
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This paper by Raju et al. proposes a unified model – “clone‑structured causal #graphs” (#CSCG) – for #hippocampal #SpatialCoding. It suggests that #SpatialMaps arise from #learning #latent higher‑order sequences rather than representing #EuclideanSpace directly. The model elegantly explains phenomena like #PlaceFields, #SplitterCells, #contextual #remapping, and predicts when #PlaceFieldMapping may mislead.
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This paper by Raju et al. proposes a unified model – “clone‑structured causal #graphs” (#CSCG) – for #hippocampal #SpatialCoding. It suggests that #SpatialMaps arise from #learning #latent higher‑order sequences rather than representing #EuclideanSpace directly. The model elegantly explains phenomena like #PlaceFields, #SplitterCells, #contextual #remapping, and predicts when #PlaceFieldMapping may mislead.
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This paper by Raju et al. proposes a unified model – “clone‑structured causal #graphs” (#CSCG) – for #hippocampal #SpatialCoding. It suggests that #SpatialMaps arise from #learning #latent higher‑order sequences rather than representing #EuclideanSpace directly. The model elegantly explains phenomena like #PlaceFields, #SplitterCells, #contextual #remapping, and predicts when #PlaceFieldMapping may mislead.
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This paper by Raju et al. proposes a unified model – “clone‑structured causal #graphs” (#CSCG) – for #hippocampal #SpatialCoding. It suggests that #SpatialMaps arise from #learning #latent higher‑order sequences rather than representing #EuclideanSpace directly. The model elegantly explains phenomena like #PlaceFields, #SplitterCells, #contextual #remapping, and predicts when #PlaceFieldMapping may mislead.
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This paper by Raju et al. proposes a unified model – “clone‑structured causal #graphs” (#CSCG) – for #hippocampal #SpatialCoding. It suggests that #SpatialMaps arise from #learning #latent higher‑order sequences rather than representing #EuclideanSpace directly. The model elegantly explains phenomena like #PlaceFields, #SplitterCells, #contextual #remapping, and predicts when #PlaceFieldMapping may mislead.
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Does neuronal information storage involve nanoscopic structural changes at #synapses? @olenas_kim &co use nanophysiology & functional EM to reveal structural changes of #hippocampal #ActiveZones during chemical potentiation @ISTAustria #PLOSBiology https://plos.io/3V22v7h
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I find this article by Ferro just out in nature communication https://rdcu.be/dOzT2 is an interesting intersection between value-based decision-making, embodied cognition/active vision, and memory #reactivation or #reinstatement. Looking is doing some heavy lifting. And lookie there, I didn't even mention the #orbitofrontalcortex recordings they did!
It caught my eye (sorry) b/c some of the scanpath analysis our lab's done in the past suggests that prior to looking at a remembered, rewarded visual target, there's an uptick in #hippocampal #ripples (Leonard et al., Current Biol 2017), which are thought to signal the underlying reactivation of task-relevant activity patterns. And of course, there's work by a number of groups on memory guidance to rewarding/goal targets, that rely on hippocampal function. Ours based on an MTL amnesic: Yoo, et al., (2020). Long-term memory and hippocampal function support predictive gaze control during goal-directed search. Journal of Vision, https://doi.org/10.1167/jov.20.5.10 following from Chau et al., 2011, and the changes in scanpaths and pupil responses of aging adults and people with Alzheimer's disease, too: Dragan, M. C.,et al., (2017). Behavioural Brain Research, https://doi.org/10.1016/j.bbr.2016.09.014
Where we choose to look says so much: see e.g. Kragel/Voss; Castelhano/Henderson, Wynn/Buchsbaum/Olsen/Ryan esp what Jordana Wynn followed up with on the scanpath reinstatements suggests a really intertwined relationship between memory, eye movements, and learning/decisions about goals. (forgive that I'm missing many others and pls add below!)
TL;DR The foraging decision-making folks and the memory-guided vision folks need to be increasingly up in each other's business.
Here's that Ferro link:
https://rdcu.be/dOzT2 -
#CrossFrequencyCoupling (CFC) in cortico-#hippocampal networks enables maintenance of multiple visuo-spatial items in #WorkingMemory. This study shows it also extends to #auditory info, suggesting CFC as a global mechanism for information processing in the human brain #PLOSBiology https://plos.io/3uXjhe6
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"#Hippocampal neurons reinstate specific episodic memories in humans. These #EpisodeSpecificNeurons are independent of #ConceptNeurons or #TimeCells and code the conjunction of elements that make up the event." according to Luca D. Kolibius (1st author, https://twitter.com/LucaKolibius/status/1709953380779499696)
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Sharpening the blades of the dentate #gyrus:
Federico Calegari and colleagues discuss how adult-born #neurons differentially modulate diverse aspects of #hippocampal learning and memory -
Sharpening the blades of the dentate #gyrus:
Federico Calegari and colleagues discuss how adult-born #neurons differentially modulate diverse aspects of #hippocampal learning and memory -
Sharpening the blades of the dentate #gyrus:
Federico Calegari and colleagues discuss how adult-born #neurons differentially modulate diverse aspects of #hippocampal learning and memory -
Sharpening the blades of the dentate #gyrus:
Federico Calegari and colleagues discuss how adult-born #neurons differentially modulate diverse aspects of #hippocampal learning and memory -
There will be a talk by Peter Jonas (ISTAustria) on "#Synaptic mechanisms of #patterncompletion in the #hippocampal #CA3 region":
⏰ Thu July 27 at 4.15pm CEST
🌎 https://t.co/tlk4CorzwE
📍 University of #Tübingen, Hertie-Institut für klinische Hirnforschung (HIH), Host: Ulrike Hedrich -
There will be a talk by Peter Jonas (ISTAustria) on "#Synaptic mechanisms of #patterncompletion in the #hippocampal #CA3 region":
⏰ Thu July 27 at 4.15pm CEST
🌎 https://t.co/tlk4CorzwE
📍 University of #Tübingen, Hertie-Institut für klinische Hirnforschung (HIH), Host: Ulrike Hedrich -
There will be a talk by Peter Jonas (ISTAustria) on "#Synaptic mechanisms of #patterncompletion in the #hippocampal #CA3 region":
⏰ Thu July 27 at 4.15pm CEST
🌎 https://t.co/tlk4CorzwE
📍 University of #Tübingen, Hertie-Institut für klinische Hirnforschung (HIH), Host: Ulrike Hedrich -
There will be a talk by Peter Jonas (ISTAustria) on "#Synaptic mechanisms of #patterncompletion in the #hippocampal #CA3 region":
⏰ Thu July 27 at 4.15pm CEST
🌎 https://t.co/tlk4CorzwE
📍 University of #Tübingen, Hertie-Institut für klinische Hirnforschung (HIH), Host: Ulrike Hedrich -
There will be a talk by Peter Jonas (ISTAustria) on "#Synaptic mechanisms of #patterncompletion in the #hippocampal #CA3 region":
⏰ Thu July 27 at 4.15pm CEST
🌎 https://t.co/tlk4CorzwE
📍 University of #Tübingen, Hertie-Institut für klinische Hirnforschung (HIH), Host: Ulrike Hedrich -
Rethinking the #hippocampal #cognitivemap as a #metalearning computational module – New publication by Luca Ambrogioni &
H. Freyja Ólafsdóttir (2023) -
New insights into how hippocampal #MemoryFormation & recall is controlled by a disinhibition-based mechanism, supported by #hippocampal #somatostatin interneurons & their pontine #brainstem inputs from the #NucleusIncertus #PLOSBiology https://plos.io/3NkleaD
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#ephys study of monkeys reveals a 2-stage mechanism for recalling #SemanticMemory: 1. retrieve its allocentric representation in #PerirhinalCortex, 2. represent the retrieved information in the 1st-person perspective by #hippocampal neurons #PLOSBiology https://plos.io/3qB4Olx