Alisa Leshchenko 🦕
CompNeuro @Columbia Zuckerman Institute, Fusi Lab | Cognitive maps, abstraction, compositionality in a neural substrate | #NeuroAI
- Reposted by Alisa Leshchenko 🦕When we see something that's moving, our memories about it end up projected forward in time: We remember it further along than it was. In a new paper in 𝘗𝘴𝘺𝘤𝘩𝘰𝘭𝘰𝘨𝘪𝘤𝘢𝘭 𝘚𝘤𝘪𝘦𝘯𝘤𝘦, out today and led by @dillonplunkett.bsky.social, we demonstrate that this happens even when there is 𝙣𝙤 𝙢𝙤𝙩𝙞𝙤𝙣 𝙬𝙝𝙖𝙩𝙨𝙤𝙚𝙫𝙚𝙧.🧵
- Reposted by Alisa Leshchenko 🦕Another new paper from the lab: Predictive theories like the SR imply that navigators who navigate differently should have cognitive maps which differ in predictable ways. Here we show that this holds in mouse hippocampal CA1. www.sciencedirect.com/science/arti...
- Reposted by Alisa Leshchenko 🦕It has been so so fun to think with some of my favorite scientists about what it means to understand!
- What does it mean to understand language? We argue that the brain’s core language system is limited, and that *deeply* understanding language requires EXPORTING info to other brain regions. w/ @neuranna.bsky.social @evfedorenko.bsky.social @nancykanwisher.bsky.social arxiv.org/abs/2511.19757 1/n🧵👇
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- Reposted by Alisa Leshchenko 🦕LLMs are trained to compress data by mapping sequences to high-dim representations! How does the complexity of this mapping change across LLM training? How does it relate to the model’s capabilities? 🤔 Announcing our #NeurIPS2025 📄 that dives into this. 🧵below #AIResearch #MachineLearning #LLM
- Reposted by Alisa Leshchenko 🦕Excited to share a new preprint w/ @annaschapiro.bsky.social! Why are there gradients of plasticity and sparsity along the neocortex–hippocampus hierarchy? We show that brain-like organization of these properties emerges in ANNs that meta-learn layer-wise plasticity and sparsity. bit.ly/4kB1yg5
- Reposted by Alisa Leshchenko 🦕Connectome suggests brain’s synaptic weights follow heavy-tailed distributions, yet most analyses of RNNs assume Gaussian connectivity. 🧵⬇️ Our @alleninstitute.org #NeurIPS2025 paper shows heavy-tailed weights can strongly affect dynamics, trade off robustness + attractor dimension.
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- Reposted by Alisa Leshchenko 🦕Total Lunar Eclipse - 26 May 2021 - From Ángel López-Sánchez - flic.kr/p/2m1PLyZ
- Jorge Luis Borges
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- Reposted by Alisa Leshchenko 🦕The Eye of Silence wikiart.org/en/max-ernst/the-ey…
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- Reposted by Alisa Leshchenko 🦕Prominence 10-26-10 - From Jason Major (jpmajor.bsky.social) - flic.kr/p/8NkYgk
- Reposted by Alisa Leshchenko 🦕ESA ROSETTA 14 July 2015 - From 2di7 & titanio44 - flic.kr/p/vpqn2z
- Reposted by Alisa Leshchenko 🦕Mimas, Epimetheus and Rings - From Gordan Ugarković (ugordan.bsky.social) - flic.kr/p/5oPunj
- Reposted by Alisa Leshchenko 🦕🧠🚨 How does the hippocampus transform the visual similarity space to resolve memory interference? In this new preprint, we found that the hippocampus sequentially inverts the behaviorally relevant dimensions of similarity 🧵 www.biorxiv.org/content/10.1...
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- Reposted by Alisa Leshchenko 🦕Preprint Alert 🚀 Can we simultaneously learn transformation-invariant and transformation-equivariant representations with self-supervised learning? TL;DR Yes! This is possible via simple predictive learning & architectural inductive biases – without extra loss terms and predictors! 🧵 (1/10)
- Reposted by Alisa Leshchenko 🦕So excited to see this preprint released from the lab into the wild. Charlotte has developed a theory for how learning curriculum influences learning generalization. Our theory makes straightforward neural predictions that can be tested in future experiments. (1/4) 🧠🤖 🧠📈 #MLSky
- 🚨 New preprint alert! 🧠🤖 We propose a theory of how learning curriculum affects generalization through neural population dimensionality. Learning curriculum is a determining factor of neural dimensionality - where you start from determines where you end up. 🧠📈 A 🧵: tinyurl.com/yr8tawj3
- Reposted by Alisa Leshchenko 🦕Tomorrow the next meeting of MIT #Consciousness Club. This is a Zoom link 🔗⬇️
- Reposted by Alisa Leshchenko 🦕Max Ernst Showing a Young Girl the Head of his Father wikiart.org/en/max-ernst/max-er…
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- Reposted by Alisa Leshchenko 🦕Interesting paper! www.nature.com/articles/s41...
- Reposted by Alisa Leshchenko 🦕Super fun New blog post about @kristorpjensen.bsky.social awesome preprint.
- How does the prefrontal cortex plan? New research from @kristorpjensen.bsky.social & colleagues proposes a ‘spacetime attractor’ model, showing that the brain may plan using the same principles it uses to fill in missing information about the present. www.sainsburywellcome.org/web/blog/new...
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- Reposted by Alisa Leshchenko 🦕University of Vienna Ceiling Paintings (Medicine), detail showing Hygieia botfrens.com/collections/109/con…
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- Reposted by Alisa Leshchenko 🦕A study led by Cina Aghamohammadi is now out in @natcomms.nature.com! We developed a mathematical framework for partitioning spiking variability, which revealed that spiking irregularity is nearly invariant for each neuron and decreases along the cortical hierarchy. www.nature.com/articles/s41...
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- Reposted by Alisa Leshchenko 🦕I'll pass them apart botfrens.com/collections/69/cont…
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- Reposted by Alisa Leshchenko 🦕New paper dropped! Led by @thosvarley.bsky.social and Pai Vaibhav, we show that flows of information within a #xenobot resemble flows of information observed in adult human brains. Thomas provides caveats and context below. w/ @drmichaellevin.bsky.social, Caitlin Grasso, & Jeantine Lunshof.
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- Reposted by Alisa Leshchenko 🦕Lunar Occultation of Saturn 9/17/2024 - From Ryan Kinnett (rkinnett.bsky.social) - flic.kr/p/2qh5d47
- Reposted by Alisa Leshchenko 🦕CASSINI (4) - From Jacint Roger (landru79.bsky.social) - flic.kr/p/2iKfns6
- Reposted by Alisa Leshchenko 🦕We’re recruiting a postdoctoral fellow to join our team! 🎉 I’m happy to share that I’ve opened back up the search for this position (it was temporarily closed due to funding uncertainty). See lab page and doc below for details!
- The Visual Learning Lab at UC San Diego is looking for a postdoctoral research fellow to join our lab! Read more about our lab at www.vislearnlab.org
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- Reposted by Alisa Leshchenko 🦕Very excited to share that our work (together with co-first author Shanka Subhra Mondal and @neuroai.bsky.social ) on a brain-inspired architecture for planning with LLMs is now out in Nature Communications! www.nature.com/articles/s41... (thread below)
- Reposted by Alisa Leshchenko 🦕Composition in Color A wikiart.org/en/piet-mondrian/co…
- Reposted by Alisa Leshchenko 🦕Titan on the side - From Val Klavans (valklavans.bsky.social) - flic.kr/p/dfiN8k
