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Irina Barnaveli

@barnaveliirina.bsky.social
180 followers 300 following 14 posts

Postdoc in Cognitive Neuroscience @doellerlab.bsky.social

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Reposted by Irina Barnaveli
Andrej Bicanski @andrejbicanski.bsky.social · 09/03/2026
Now out in Hippocampus. Fei Wang‘s model of Trace Vector Cells and intra-subiculum processing, consistent with know effects in CA1. onlinelibrary.wiley.com/share/CPZPYM...
onlinelibrary.wiley.com
Dynamic Updating of Cognitive Maps via Traces of Experience in the Subiculum
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Reposted by Irina Barnaveli
Andrej Bicanski @andrejbicanski.bsky.social · 09/03/2026
1/N: Dear cognitive map fans, I’d like to share a model I’ve been working on for a while (clearing backlog :). I show how a vector navigation architecture (VNA) and a “positional inference network” (PIN) can build Universal Cognitive Maps (UCMs) for abstract spaces. www.biorxiv.org/content/10.6...
biorxiv.org
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Reposted by Irina Barnaveli
baror-shira.bsky.social @baror-shira.bsky.social · 11/02/2026
Super thrilled to finally share the results of our team effort, from the lab of the one and only @ayab.bsky.social. Hopefully it will stir interesting discussions about how the brain balances continuity and segmentation
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Reposted by Irina Barnaveli
Nico Schuck @nicoschuck.bsky.social · 18/01/2026
How do we achieve few-shot generalization? New work led by @fabianrenz.bsky.social dives into the role of replay in learning and using structure to generalize reward. Dream team effort with Shany Grossman @nathanieldaw.bsky.social Peter Dayan & @doellerlab.bsky.social www.biorxiv.org/content/10.6...
biorxiv.org
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Reposted by Irina Barnaveli
Qiaoli Huang @qiaoli-huang.bsky.social · 16/01/2026
Our new paper, now published in Cell Reports, asks how the brain adaptively shapes its representations according to the statistical structure of the environment to overcome the limits of working memory capacity. www.cell.com/cell-reports...
cell.com
Efficient coding in working memory is adapted to the structure of the environment
Huang et al. show that the brain optimizes working memory by compressing information when environmental regularities exist. MEG reveals distinct neural systems for abstract structure and item details,...
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Reposted by Irina Barnaveli
Casper Kerrén @ckerren.bsky.social · 08/01/2026
New preprint: Inference over hidden contexts shapes the geometry of conceptual knowledge for flexible behaviour. In this pre-reg study, our core claim was that we don’t just learn stimulus-reward. We infer hidden context and that inference re-wires attention and neural state space on the fly. 1/8
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Reposted by Irina Barnaveli
Theo Schäfer @theoschaefer.bsky.social · 22/12/2025
Happy to share this early Christmas present 🎄: our paper about geometry- and locomotion-dependence of 3D memory got published in PNAS! Joint work with co-first-author Volker Reisner (@reisnerv.bsky.social) as well as Leonard König, Misun Kim & Christian Doeller www.pnas.org/doi/10.1073/
pnas.org
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Reposted by Irina Barnaveli
Janis Keck @keckjanis.bsky.social · 04/12/2025
New preprint! Have you ever wondered, what are these fuzzy simplicial sets, the theoretical framework behind e.g. UMAP? Here we show that you may simply see them as marginal distributions over simplicial sets. This provides a generative model for UMAP. (1/2) arxiv.org/abs/2512.03899
arxiv.org
Probabilistic Foundations of Fuzzy Simplicial Sets for Nonlinear Dimensionality Reduction
Fuzzy simplicial sets have become an object of interest in dimensionality reduction and manifold learning, most prominently through their role in UMAP. However, their definition through tools from alg...
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Reposted by Irina Barnaveli
Nicholas Menghi @nichome.bsky.social · 02/12/2025
Our new paper, now published in @natcomms.nature.com , asks a simple question: when two tasks share a common structure, does the brain learn them more efficiently? Surprisingly, this was not the case. Thread below (1/7) rdcu.be/eSwvU
rdcu.be
The effects of task similarity during representation learning in brains and neural networks
Nature Communications - Here, the authors show learning tasks with similar structures can initially cause interference and slow down learning, but both the brain and artificial networks gradually...
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Reposted by Irina Barnaveli
Andrej Bicanski @andrejbicanski.bsky.social · 03/10/2025
New preprint from the lab and great work by Fei Wang. We show how subiculum trace vector cells can be modeled consistent with known effects in CA1. Traces are driven by a mismatch learning rule to keep associative memories in line with experience. www.biorxiv.org/content/10.1...
biorxiv.org
Dynamic updating of cognitive maps via traces of experience in the subiculum
In the classical view of hippocampal function, the subiculum is assigned the role as the output layer. In spatial paradigms, some subiculum neurons manifest as so-called boundary vector cells (BVCs), ...
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Reposted by Irina Barnaveli
Nicholas Menghi @nichome.bsky.social · 23/09/2025
🚨 New preprint! Impact of Task Similarity and Training Regimes on Cognitive Transfer and Interference 🧠 We compare humans and neural networks in a learning task, showing how training regime and task similarity interact to drive transfer or interference. www.biorxiv.org/content/10.1...
biorxiv.org
Impact of Task Similarity and Training Regimes on Cognitive Transfer and Interference
Learning depends not only on the content of what we learn, but also on how we learn and on how experiences are structured over time. To investigate how task similarity and training regime interact dur...
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Reposted by Irina Barnaveli
Max Planck Institute for Human Cognitive and Brain Sciences @mpicbs.bsky.social · 05/09/2025
Huge congratulations 🥳 to @sofievalk.bsky.social & @reznikdan.bsky.social for receiving ERC Starting Grants 2025! We're proud of you! Learn more about their projects: www.cbs.mpg.de/2397348/2025...
cbs.mpg.de
Sofie Valk and Daniel Reznik receive ERC Starting Grants
Sofie Valk and Daniel Reznik receive ERC Starting Grants
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Reposted by Irina Barnaveli
Earl K. Miller @earlkmiller.bsky.social · 15/08/2025
New theory: Categorization is Baked Into the Brain Categorization is not a late stage of sensory processing but a core computation that begins at the earliest stages, occurring throughout the cortex as predictive feedback shapes feedforward processing. doi.org/10.31234/osf... #neuroscience
doi.org
OSF
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Reposted by Irina Barnaveli
Shrey Dixit @shreydixit.bsky.social · 25/06/2025
🚨Preprint Alert: Who Does What in Deep Learning? Multidimensional Contribution of Neural Units using Game Theory: arxiv.org/abs/2506.19732 The result of my MSc thesis is out with @kayson.bsky.social @fatemehhadaeghi.bsky.social @patrickmineault.bsky.social @kordinglab.bsky.social, Claus C. Hilgetag
arxiv.org
Who Does What in Deep Learning? Multidimensional Game-Theoretic Attribution of Function of Neural Units
Neural networks now generate text, images, and speech with billions of parameters, producing a need to know how each neural unit contributes to these high-dimensional outputs. Existing explainable-AI ...
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Reposted by Irina Barnaveli
Janis Keck @keckjanis.bsky.social · 25/06/2025
Excited to share that our work on the interplay of symmetric learning rules and successor representations (SR) is published in @plos.org (comp.bio) Work done together with @doellerlab.bsky.social, @caswell.bsky.social and Juergen Jost. doi.org/10.1371/jour... #neuroskyence #compneurosky 1/n
doi.org
Impact of symmetry in local learning rules on predictive neural representations and generalization in spatial navigation
Author summary The hippocampus is a brain region which plays a crucial role in spatial navigation for both animals and humans. Contemporarily, it’s thought to store predictive representations of the e...
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Reposted by Irina Barnaveli
Salma Elnagar @salmaelnagar.bsky.social · 19/06/2025
📣 Very excited for our symposium on “Building Knowledge Structures” tomorrow at 16:30 at @pug2025.bsky.social Together with amazing people: @barnaveliirina.bsky.social @lukaskunz.bsky.social @mirkothm.bsky.social and Andrea Greve
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Reposted by Irina Barnaveli
Volker Reisner @reisnerv.bsky.social · 22/05/2025
New preprint! We explored how learned movement patterns affect our sense of traveled distance and proposed a neurocomputational model that leverages embodied memories to denoise spatial codes. 🔗 www.biorxiv.org/cgi/content/...
biorxiv.org
Re-enacting steps supports human path integration consistent with motor-corrected grid cell drift
Efficient navigation, especially in the absence of vision, requires path integration - the continuous updating of spatial position from self-motion cues. However, path integration is prone to cumulati...
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Reposted by Irina Barnaveli
Nicholas Menghi @nichome.bsky.social · 08/05/2025
🧠 Can a short period of awake, quiet rest help you generalize better? In our new study, we tested this with a learning paradigm comparing offline vs online wake period. www.sciencedirect.com/science/arti...
sciencedirect.com
Delayed emergence of EEG-based task-relevant representations
This paper examines the effect of a period of quiet wakefulness (an “offline wake” state) on the performance of a decision making task. An initial fee…
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Irina Barnaveli @barnaveliirina.bsky.social · 08/05/2025
Our paper in @natcomms.nature.com, we show how cognitive maps in the hippocampal system could solve the general problem of representing and relating multiple alternative action plans.  doi.org/10.1038/s414... With @doellerlab.bsky.social, Patrick Haggard, @vigano.bsky.social, Daniel Reznik
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