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Anirudh GJ

@anirudhgj.bsky.social
66 followers 209 following 1 posts

NeuroAI @ Mila & Universite de Montreal w/ Prof. Matthew Perich. Studying continual learning and adaptation in Brain and ANNs.

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Reposted by Anirudh GJ
Matt Perich @mattperich.bsky.social · 07/08/2026
At long last! I'm excited we can finally share the final published form of CURBD, our method to disentangle multi-regional interactions with RNNs, out today in Neuron. Thanks to @kanakarajanphd.bsky.social and @deisseroth.bsky.social and all of our collaborators! 📃: doi.org/10.1016/j.ne...
doi.org
Redirecting
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Guillaume Lajoie @glajoie.bsky.social · 21/06/2026
Great paper furthering our understanding of learning dynamics in RNNs. This also caps off the PhD journey of the immensely talented @ezekielwilliams.bsky.social !
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Antonino Greco @agreco.bsky.social · 27/05/2026
"Our work shows that these sophisticated behaviours can emerge from the modulation of self-sustained oscillations coupled by diffusion, providing a physically grounded mechanism for information processing in non-neural organisms" Physarum polycephalum, my favorite non-neural intelligent system 💛
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Anton Hur @antonhur.com · 11/05/2026
WE DON'T NEED PETROLEUM-BASED PLASTICS ANYMORE! "The [bamboo plastic] outperforms most commercial plastics and bioplastics in mechanical and thermo-mechanical metrics while maintaining full biodegradability in soil within 50 days and closed-loop recyclability with 90% retained strength."
nature.com
High-strength, multi-mode processable bamboo molecular bioplastic enabled by solvent-shaping regulation - Nature Communications
Bioplastics derived from biomass show promise as sustainable alternatives to petrochemical plastics, but their adoption is hindered by their inferior mechanical properties and processability. Here, th...
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Will Redman @wtredman.bsky.social · 28/04/2026
New preprint out 🚨 “Predictive pursuit emerges in high-dimensional recurrent neural networks”! This was an awesome collaboration with co-first author @fatihdinc.bsky.social , @andyalexander.bsky.social, @xiaoxiao-lin.bsky.social, and May Chen biorxiv.org/content/10.6... 1/
biorxiv.org
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Charley Wu @thecharleywu.bsky.social · 27/04/2026
🚨 New preprint w/ Valerio Rubino and Peter Dayan: how do people discover and use compositional structure under constraints? osf.io/preprints/ps... A key factor is a simple heuristic that favors reuse of repeated and symmetric fragments across scales, is robust to time pressure, and sped up RTs 🧵👇
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David G. Clark @david-g-clark.bsky.social · 28/04/2026
New preprint: "Linear equivalence of nonlinear recurrent neural networks." For large nonlinear (potentially chaotic) RNNs with random connectivity, the full N×N covariance matrix takes the same form as that of a ~linear~ network with the same couplings, driven by independent noise.
arxiv.org
Linear equivalence of nonlinear recurrent neural networks
Large nonlinear recurrent neural networks with random couplings generate high-dimensional, potentially chaotic activity whose structure is of interest in neuroscience, machine learning, ecology, and o...
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Ann Huang @annhuang42.bsky.social · 23/04/2026
[ #ICLR2026 ] How do we know if two systems are performing the same computation when they are constantly driven by different external inputs? 🧠🤖 I’ll be presenting our novel method InputDSA tomorrow April 23 (2:15pm-4:45pm EDT in Pavilion 3 P3-#1614)📍 Come swing by our poster! I’d love to chat!
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Matt Perich @mattperich.bsky.social · 17/03/2026
New paper! We introduce JEDI, Jointly Embedded Dynamics Inference for neural dynamics. arxiv.org/abs/2603.10489. JEDI flexibly infers dynamical principles (across behaviors/contexts) from neural population data through RNNs constrained at single-neuron resolution to reproduce that data.
arxiv.org
JEDI: Jointly Embedded Inference of Neural Dynamics
Animal brains flexibly and efficiently achieve many behavioral tasks with a single neural network. A core goal in modern neuroscience is to map the mechanisms of the brain's flexibility onto the dynam...
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Jonathan Pillow @jpillowtime.bsky.social · 28/01/2026
New paper with @deanpospisil.bsky.social , in which we introduce a new estimator for the "signal eigenspectrum" (i.e., the eigenvalues of the noiseless population responses). We re-analyze data from Stringer et al 2019 and show eigenvalues of mouse V1 are well explained by a broken power.
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Shervin Safavi @neuroprinciplist.bsky.social · 08/01/2026
Thrilled to see the first preprint of the lab out 🤩 Check it out if you need to compare dynamics in your data and RNN (or any other combinations of dynamical systems)!
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Marco Palombi @ocrampal.bsky.social · 03/01/2026
When we try to formalize a neuron computationally, we don't translate biology into code—we perform a violent collapse. www.ocrampal.com/what-a-neuro... #philosophy #science #psychology #AI #intelligence #physics #biology #philmind #philsci #philsky #philpsy #neurosky #neuroskyence
ocrampal.com
What a Neuron Teaches Us About Computation's Limits
When we try to formalize a neuron computationally, we don't translate biology into code—we perform a violent collapse. We lock causation into fixed arrows when biology lives in causal ambiguity. We sy...
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Gaute Einevoll @gauteeinevoll.bsky.social · 03/01/2026
Episode #36 in #TheoreticalNeurosciencePodcast: On low-dimensional manifolds in motor cortex – with Sara Solla @sasolla.bsky.social theoreticalneuroscience.no/thn36 Manifold analysis has changed our thinking on how cortex works. One of the pioneers of this modelling approach explains.
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Sam Gershman @gershbrain.bsky.social · 19/12/2025
Goal selection through the lens of subjective functions: arxiv.org/abs/2512.15948 I welcome any feedback on these preliminary ideas.
arxiv.org
Subjective functions
Where do objective functions come from? How do we select what goals to pursue? Human intelligence is adept at synthesizing new objective functions on the fly. How does this work, and can we endow arti...
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Harrison Ritz @hritz.bsky.social · 18/12/2025
We took a stab at how to infer both the dynamics and control parameters of partially-observable systems. It’s a nasty problem, but @vgeadah.bsky.social made tremendous progress, ending up with some really elegant formalisms.
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Earl K. Miller @earlkmiller.bsky.social · 17/12/2025
Do we need to study animals in the wild to fully understand the brain? Maybe. OTOH, I sit in front a computer all day. bigthink.com/neuropsych/n... #neuroscience
bigthink.com
The next revolution in neuroscience is happening outside the lab
By tracking brain activity as primates move freely in the wild, neuroethology could reshape what we think we know about our own minds.
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Kanaka Rajan @kanakarajanphd.bsky.social · 16/12/2025
New paper for #neurips2025! AI models adjust millions of internal settings to get better at a task. But how are these adjustments determined? For decades, we've mostly figured this out through trial & error. We took a different approach...🧵 (1/6) 🔗 openreview.net/forum?id=oMi...
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Owen Marschall @omarschall.bsky.social · 15/12/2025
1/X Excited to present this preprint on multi-tasking, with @david-g-clark.bsky.social and Ashok Litwin-Kumar! Timely too, as “low-D manifold” has been trending again. (If you read thru the end, we escape Flatland and return to the glorious high-D world we deserve.) www.biorxiv.org/content/10.6...
biorxiv.org
A theory of multi-task computation and task selection
Neural activity during the performance of a stereotyped behavioral task is often described as low-dimensional, occupying only a limited region in the space of all firing-rate patterns. This region has...
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Friedemann Zenke @fzenke.bsky.social · 27/11/2025
1/6 New preprint 🚀 How does the cortex learn to represent things and how they move without reconstructing sensory stimuli? We developed a circuit-centric recurrent predictive learning (RPL) model based on JEPAs. 🔗 doi.org/10.1101/2025... Led by @atenagm.bsky.social @mshalvagal.bsky.social
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Ann Huang @annhuang42.bsky.social · 24/11/2025
📍Excited to share that our paper was selected as a Spotlight at #NeurIPS2025! arxiv.org/pdf/2410.03972 It started from a question I kept running into: When do RNNs trained on the same task converge/diverge in their solutions? 🧵⬇️
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David G. Clark @david-g-clark.bsky.social · 03/11/2025
Now in PRX: Theory linking connectivity structure to collective activity in nonlinear RNNs! For neuro fans: conn. structure can be invisible in single neurons but shape pop. activity For low-rank RNN fans: a theory of rank=O(N) For physics fans: fluctuations around DMFT saddle⇒dimension of activity
journals.aps.org
Connectivity Structure and Dynamics of Nonlinear Recurrent Neural Networks
The structure of brain connectivity predicts collective neural activity, with a small number of connectivity features determining activity dimensionality, linking circuit architecture to network-level...
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Eugene Vinitsky 🍒 @eugenevinitsky.bsky.social · 23/10/2025
What if we did a single run and declared victory
Three panel thing. In the left panel we use error bars. In the second, we take statistical significance as the biggest number but still have error bars. In LLM science, we just have the biggest number
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Eric Elmoznino @ericelmoznino.bsky.social · 18/08/2025
Very excited to release a new blog post that formalizes what it means for data to be compositional, and shows how compositionality can exist at multiple scales. Early days, but I think there may be significant implications for AI. Check it out! ericelmoznino.github.io/blog/2025/08...
ericelmoznino.github.io
Defining and quantifying compositional structure
What is compositionality? For those of us working in AI or cognitive neuroscience this question can appear easy at first, but becomes increasingly perplexing the more we think about it. We aren’t shor...
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Matt Perich @mattperich.bsky.social · 04/08/2025
📰 I really enjoyed writing this article with @thetransmitter.bsky.social! In it, I summarize parts of our recent perspective article on neural manifolds (www.nature.com/articles/s41...), with a focus on highlighting just a few cool insights into the brain we've already seen at the population level.
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GerstnerLab @gerstnerlab.bsky.social · 08/08/2025
Is it possible to go from spikes to rates without averaging? We show how to exactly map recurrent spiking networks into recurrent rate networks, with the same number of neurons. No temporal or spatial averaging needed! Presented at Gatsby Neural Dynamics Workshop, London.
youtu.be
From Spikes To Rates
YouTube video by Gerstner Lab
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Alex Efremov @audiodrome.bsky.social · 16/07/2025
I wonder, where would be a good place to do modeling and chat with many people that study different species or do comparative studies? (asking for a friend)
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Spencer LaVere Smith @spencerlaveresmith.bsky.social · 10/07/2025
Mice learn these tasks and are robust to perturbations like fog. Now, we invite you all to make AI agents to beat mice. We present our #NeurIPS competition. You can learn about it here: robustforaging.github.io (7/n)
A summary figure for a NeurIPS competition where AI agents compete with mice in a visual foraging task.
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Blake Richards @tyrellturing.bsky.social · 25/06/2025
This paper carefully examines how well simple units capture neural data. To quote someone from my lab (they can take credit if they want): Def not news to those of us who use [ANN] models, but a good counter argument to the "but neurons are more complicated" crowd. arxiv.org/abs/2504.08637 🧠📈 🧪
arxiv.org
Simple low-dimensional computations explain variability in neuronal activity
Our understanding of neural computation is founded on the assumption that neurons fire in response to a linear summation of inputs. Yet experiments demonstrate that some neurons are capable of complex...
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Earl K. Miller @earlkmiller.bsky.social · 25/06/2025
"These findings validate core predictions of Spatial Computing by showing that oscillatory dynamics not only gate information in time but also shape where in the cortex cognitive content is represented." More on Spatial Computing: doi.org/10.1038/s414...
doi.org
Working memory control dynamics follow principles of spatial computing - Nature Communications
It is unclear how cognitive computations are performed on sensory information. Here, neural evidence from working memory tasks suggests that the physical dimensions of cortical networks are used to up...
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David G. Clark @david-g-clark.bsky.social · 07/03/2025
(1/23) In addition to the new Lady Gaga album "Mayhem," my paper with Manuel Beiran, "Structure of activity in multiregion recurrent neural networks," has been published today. PNAS link: www.pnas.org/doi/10.1073/... (see dclark.io for PDF) An explainer thread...
pnas.org
Structure of activity in multiregion recurrent neural networks | PNAS
Neural circuits comprise multiple interconnected regions, each with complex dynamics. The interplay between local and global activity is thought to...
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Earl K. Miller @earlkmiller.bsky.social · 23/06/2025
Music is universal. It varies more within than between societies and can be described by a few key dimensions. That’s because brains operate by using the raw materials of music: oscillations (brainwaves). www.science.org/doi/10.1126/... #neuroscience
science.org
Universality and diversity in human song
Songs exhibit universal patterns across cultures.
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Britton Sauerbrei @brittonsauerbrei.bsky.social · 23/06/2025
1/N How do neural dynamics in motor cortex interact with those in subcortical networks to flexibly control movement? I’m beyond thrilled to share our work on this problem, led by Eric Kirk @eric-kirk.bsky.social with help from Kangjia Cai! www.biorxiv.org/content/10.1...
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Dan Levenstein @dlevenstein.bsky.social · 23/06/2025
Thrilled to announce I'll be starting my own neuro-theory lab, as an Assistant Professor at @yaleneuro.bsky.social @wutsaiyale.bsky.social this Fall! My group will study offline learning in the sleeping brain: how neural activity self-organizes during sleep and the computations it performs. 🧵
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Cian O'Donnell @cianodonnell.bsky.social · 22/06/2025
aside from this being a v cool paper I also want to congratulate the authors on the incredible SNR achieved in the title via a complete absence of filler words Neuromorphic hierarchical modular reservoirs www.biorxiv.org/content/10.1...
screenshot of biorxiv paper titled "Neuromorphic hierarchical modular reservoirs", authors Filip Milisav,
Andrea I Luppi, Laura E Suárez, Guillaume Lajoie, Bratislav Misic
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Avery HW Ryoo @averyryoo.bsky.social · 06/06/2025
New preprint! 🧠🤖 How do we build neural decoders that are: ⚡️ fast enough for real-time use 🎯 accurate across diverse tasks 🌍 generalizable to new sessions, subjects, and even species? We present POSSM, a hybrid SSM architecture that optimizes for all three of these axes! 🧵1/7
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Dan Levenstein @dlevenstein.bsky.social · 21/02/2025
Curious about the history of the manifold/trajectory view of neural activity. My own first exposure was Gilles Laurent's chapter in "21 Problems in Systems Neuroscience", where he cites odor trajectories in locust AL (2005). This was v inspiring as a biophysics student studying dynamical systems...
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Blake Richards @tyrellturing.bsky.social · 24/01/2025
I think the biological evidence points to this not being the case. We can see instances where synapses literally undergo a form of reverse plasticity, e.g. see here: www.cell.com/trends/cogni... I think it cannot be assumed that we never wipe memories from our brains completely!
cell.com
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Danielle Beckman @daniellebeckman.bsky.social · 08/01/2025
How a neuroscientist solved the mystery of his own #LongCovid and lead to a new scientific discovery. Inspiring story. Thank you for sharing your journey @jeffmyau.bsky.social www.youcanknowthings.com/how-one-neur...
How a neuroscientist solved the mystery of his own long COVID
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Yoav Goldberg @yoavgo.bsky.social · 30/12/2024
RL promises "systems that can adapt to their environment". However, no RL system that I know of actually fulfill anything close to this goal, and, furthermore, I'd argue that all the current RL methodologies are actively hostile to this goal. Prove me wrong.
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Jonathan A. Michaels @jonathanamichaels.bsky.social · 28/12/2024
This is also one of the reasons why autonomous vehicles will eventually be much better than humans. www.pnas.org/doi/10.1073/...
pnas.org
Comparing cooperative geometric puzzle solving in ants versus humans | PNAS
Biological ensembles use collective intelligence to tackle challenges together, but suboptimal coordination can undermine the effectiveness of grou...
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Earl K. Miller @earlkmiller.bsky.social · 22/12/2024
Flexibility of intrinsic neural timescales during distinct behavioral states www.nature.com/articles/s42... #neuroscience
nature.com
Flexibility of intrinsic neural timescales during distinct behavioral states - Communications Biology
Calcium imaging of spontaneously behaving mice show increased intrinsic neural timescales during behavior. The behavioral state of mice can be predicted from the topography of timescales of the cortex...
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Blake Richards @tyrellturing.bsky.social · 20/12/2024
This paper looks interesting - it argues that you don’t need adaptive systems like Adam to get good gradient-based training, instead you can just set a learning rate for different groups of units based on initialization: arxiv.org/abs/2412.11768 #MLSky #NeuroAI
arxiv.org
No More Adam: Learning Rate Scaling at Initialization is All You Need
In this work, we question the necessity of adaptive gradient methods for training deep neural networks. SGD-SaI is a simple yet effective enhancement to stochastic gradient descent with momentum (SGDM...
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Surya Ganguli @suryaganguli.bsky.social · 16/12/2024
There is also this one: www.sciencedirect.com/science/arti...
sciencedirect.com
Single cortical neurons as deep artificial neural networks
Utilizing recent advances in machine learning, we introduce a systematic approach to characterize neurons’ input/output (I/O) mapping complexity. Deep…
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Avery HW Ryoo @averyryoo.bsky.social · 12/12/2024
sinthlab EoY social! I'm grateful everyday that I get to work with such a kind and intelligent group of individuals. @mattperich.bsky.social @oliviercodol.bsky.social @anirudhgj.bsky.social
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hardmaru @hardmaru.bsky.social · 10/12/2024
Neural Attention Memory Models are evolved to optimize the performance of Transformers by actively pruning the KV cache memory. Surprisingly, we find that NAMMs are able to zero-shot transfer its performance gains across architectures, input modalities and even task domains! arxiv.org/abs/2410.13166
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Avery HW Ryoo @averyryoo.bsky.social · 10/12/2024
Thrilled to share a new preprint exploring the spatial organization of multisensory convergence in the mouse isocortex! 🧠🎉 Even more special as it builds on work I started during my undergrad, a lifetime ago 👨‍🦳 Check it out here: www.biorxiv.org/content/10.1...
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Rui Ponte Costa @somnirons.bsky.social · 14/11/2024
Indeed! This is in line with our cerebellar-cortical models, in which we show that cerebellar-feedback greatly alleviates the need for plasticity/gradients in the cortex! This in turn explains quite a bit of obs: doi.org/10.1101/2022... (out soon!)
doi.org
Cerebellar-driven cortical dynamics enable task acquisition, switching and consolidation
To drive behavior, the cortex must bridge sensory cues with future outcomes. However, the principles by which cortical networks learn such sensory-behavioural transformations remain largely elusive. H...
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Blake Richards @tyrellturing.bsky.social · 13/11/2024
This paper from Claudia Clopath's lab is very exciting for me. I've been musing for a while now that the challenge of approximating gradient descent is probably made way easier in the brain by feedback signals for control. Here they show it!!! openreview.net/forum?id=xav... 🧠📈 #NeuroAI 🧪
openreview.net
Feedback control guides credit assignment in recurrent neural networks
How do brain circuits learn to generate behaviour? While significant strides have been made in understanding learning in artificial neural networks, applying this knowledge to biological networks...
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Blake Richards @tyrellturing.bsky.social · 28/11/2024
This study shows that spike sequences carry information beyond what rates and latency to first spike do: www.nature.com/articles/s41... My reactions: 1) Cool to see this in humans. 2) Are people still surprised that spike times carry information beyond rates/first-spike latency?!?!?! 🧠📈 🧪
nature.com
Neuronal sequences in population bursts encode information in human cortex - Nature
The temporal order of neuronal firing within bursts of population spiking in the human anterior temporal lobe is dependent on the category as well as the identity of the individual stimulus, and this ...
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Raymond Chua @raymondrchua.bsky.social · 17/11/2024
I’m speechless. Truly an art and despite being only four minutes long, I learned a lot!
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