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Jaeeon Lee

@jel0624.bsky.social
215 followers 563 following 11 posts

Currently Postdoc in the Uchida lab Previously in Sabatini lab, Harvard jel0624.github.io

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Reposted by Jaeeon Lee
Naoshige Uchida @naoshigeuchida.bsky.social · 25/09/2026
Our new work on how belief states could be implemented by attractor-like dynamics in the brain -- an effort started in Starkweather et al. (2017) in collaboration with Sam Gershman, and Jay Hennig, now joined by Scott Linderman! Thank you to all collaborators!
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Jay Hennig @jhennig.bsky.social · 24/09/2026
Amazing work by @sromeropinto.bsky.social ! Sandra found that in Pavlovian tasks with hidden states, neural population dynamics in mouse OFC resemble beliefs/state-inference
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Sandra Romero Pinto @sromeropinto.bsky.social · 25/09/2026
Happy to have this finally out! TL;DR: The evolution of beliefs over time can be formulated as a dynamical system, and OFC neural activity appears to implement this system with its own dynamics. These emerge without explicit supervision—when animals learn to predict value in simple Pavlovian tasks
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Jeremiah Cohen @jeremiahycohen.bsky.social · 16/09/2026
Happy to share the version of record of our locus coeruleus paper here: www.nature.com/articles/s41... Prior thread on some of our discoveries in this study: bsky.app/profile/jere...
nature.com
Topographic structure and function of locus coeruleus noradrenaline neurons - Nature
Dorsal and ventral noradrenergic neurons in the locus coeruleus form topographic subpopulations whose projection patterns and activity encode choice switching, reward-prediction errors and disregard o...
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Naoshige Uchida @naoshigeuchida.bsky.social · 15/09/2026
This is a joint junior faculty search across several life sciences Departments at Harvard, including my Department of Molecular and Cellular Biology. Please apply!
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Matteo Carandini @carandinilab.net · 09/09/2026
If you thought "everything is everywhere" in the brain: inactivations reveal a clear distinction of labor. Sensory areas sense, colliculus promotes eligible actions (!), and prefrontal cortex integrates. The role of superior colliculus in a logistic decision www.biorxiv.org/content/10.6...
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Jieyu Zheng @jieyusz.bsky.social · 04/09/2026
How fast can mice learn complex mazes? With @mameister4.bsky.social we reveal memory, generalization, latent learning, and remote credit assignment of mice in the Manhattan Maze. Do mice born without a cortex or hippocampus have them too? Check it out! www.biorxiv.org/content/10.6...
biorxiv.org
Rapid spatial cognition in mice, with and without neocortex and hippocampus
Rapid learning, memory, and generalization are often attributed to circuits of the neocortex and hippocampus, but their specific role remains unclear. To examine these cognitive abilities together in ...
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Momchil Tomov @momchiltomov.bsky.social · 02/09/2026
Excited to share that our paper on explainable AI for autonomous driving is out today in @nature.com! Super proud to have been part of this amazing collaboration between Motional and MIT! Details in the 🧵
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Tal Golan @talgolanneuro.bsky.social · 28/08/2026
How can we design experiments that make computational models disagree? One section of our new @natrevneuro.nature.com Review with @kriegeskorte.bsky.social and @heikoschuett.bsky.social examines studies that used stimulus sets designed to elicit distinct predictions from competing models. 1/16
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Harrison Ritz @hritz.bsky.social · 27/08/2026
Our task-switching paper is now out at Current Biology! www.cell.com/current-biol... We find that that our brains reset to a task-neutral state between trials, providing flexibility when the upcoming task is uncertain. RNNs also learn this strategy, but only when trained to switch tasks.
schematic of how a brain might reset to a neutral state between trials
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Herbert Wu @herbertwu.bsky.social · 20/08/2026
First study out! Using a new cooperative paradigm and multi-agent inverse RL, we show that mice spontaneously adopt leader/follower roles, and the prefrontal cortex encodes these role dynamics and an egocentric social value map of the partner’s position. (1/3) www.nature.com/articles/s41...
nature.com
Asymmetric prefrontal representations for leader–follower dynamics - Nature
Mice spontaneously form leader and follower roles during cooperation, and the medial prefrontal cortex encodes these role dynamics and an egocentric social value map of the partner’s position.
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Sam Gershman @gershbrain.bsky.social · 18/08/2026
@arthurpr4t.bsky.social has a new preprint with important results on a famous psychophysical law (Weber's law). It isn't, in fact, a law, because it can be broken. A more fundamental principle (efficient coding) shows when and why Weber's law holds true. www.biorxiv.org/content/10.6...
biorxiv.org
Efficient coding makes and breaks Weber's law
Weber's law is a rare quantitative regularity in psychology, yet its origins remain debated. Here we provide causal evidence that it arises from the more fundamental principle of efficient coding. Thi...
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pnkalugin.bsky.social @pnkalugin.bsky.social · 27/01/2025
I’m thrilled to share our preprint presenting MORSE: a new way to simultaneously & quantitatively track patterns of neuromodulators/neuropeptides in vitro & in vivo using spatially multiplexed 3D imaging of 10+ green optical sensors on a microendoscope biorxiv.org/content/10.1101/2025.01.26.634931v1
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Chunyu Ann Duan @annduan.bsky.social · 06/08/2026
New preprint from the lab! Behavioral and neural mechanisms for stochastic choices in mixed-strategy games: doi.org/10.64898/202... We use game theoretic tasks, cross species comparisons, modelling strategies, and mesoscale imaging to reveal a cortical mechanism for unpredictable choices.
doi.org
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Reza Shadmehr @rezashadmehr.bsky.social · 28/07/2026
If an action results in error, each neuron requires an individualized teaching signal that guides change in its output. This is the credit assignment problem of learning. Are there neurons in the brain that can compute such a sophisticated teaching signal? Yes. www.biorxiv.org/content/10.6...
biorxiv.org
Climbing fibers encode the gradient of a loss function for the cerebellum
Neurons in the brain are often many synapses away from motoneurons, yet if a movement results in error, each distant neuron needs a teacher that considers its specific contribution to production of th...
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Sam Gershman @gershbrain.bsky.social · 19/07/2026
This is a really interesting and important study: www.nature.com/articles/s41... However, isn't it concerning that sweeping conclusions about functional organization of cortex are being reached on the basis of a single task?
nature.com
Rarely categorical, highly separable representations along the cortical hierarchy - Nature
Cortical circuits prioritize diversity over categorical structure, supporting a computational regime geared towards high-dimensional, highly separable neural representations.
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Ben Hayden @benhayden.bsky.social · 14/07/2026
New preprint from the lab! “A number simplex in the human medial temporal lobe” led by @hanlin-zhu.bsky.social 🧵 www.biorxiv.org/content/10.6...
biorxiv.org
A number simplex in the human medial temporal lobe
Humans handle numbers nimbly, suggesting a richer neural manifold structure than the prevalent mental number line model. In populations of medial temporal lobe (MTL) neurons in humans performing two s...
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Lex Kravitz @kravitzlab.com · 09/07/2026
I am happy to share our latest manuscript, led by newly-minted PhD Justin Wang, identifying a neural population that selectively controls hedonic, but not homeostatic, feeding. www.biorxiv.org/content/10.6...
biorxiv.org
Ventral pallidal GABAergic neurons control hedonic feeding and obesity
Food intake is governed by two interacting drives. The homeostatic hunger drive regulates food intake to fulfill caloric needs while the hedonic drive promotes intake of palatable foods outside of cal...
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Joshua Glaser @joshuaiglaser.bsky.social · 13/07/2026
Excited to share this work, led by Andrew Zimnik and Sherry An, from @mchurchland.bsky.social and my labs! www.cell.com/neuron/fullt... 1/2
cell.com
Sparse component analysis: A method that uncovers separable computations within neural population activity
Zimnik et al. provide a new, interpretable, unsupervised dimensionality approach for neural population activity. Their approach, sparse component analysis (SCA), reveals the latent factors correspondi...
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Jan Drugowitsch @jdrugowitsch.bsky.social · 13/07/2026
🚨 Big news 🚨 After 10 years at Harvard, my lab is moving to Barcelona in Spring 2027 to join @cbc-upf.bsky.social and the Department of Engineering at @upf.edu. 1/4
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Spencer LaVere Smith @spencerlaveresmith.bsky.social · 13/07/2026
Ecological Visual Processing in the Mouse - with @michaelgoard.bsky.social @crisniell.bsky.social @mbeyeler.bsky.social Visual computations that are engaged in ecological contexts: active sensing, motion processing, scene analysis, distance estimation, and spatial perception. doi.org/10.1146/annu...
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Kenneth Harris @kenneth-harris.bsky.social · 21/05/2026
Introducing the International Brain Lab AI Agent: a tool to help researchers analyze neural activity from across the mouse brain, using AI coding agents. Please try it! We would love your feedback. github.com/int-brain-la...
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The Transmitter @thetransmitter.bsky.social · 09/07/2026
AI may soon enable researchers to generate high-quality science at a previously unimaginable speed. The effects for researchers will be as disruptive as industrial mass production was for artisan manufacturers, writes @kenneth-harris.bsky.social. #neuroskyence www.thetransmitter.org/artificial-i...
thetransmitter.org
Mass-produced science is coming. What happens to scientists?
Artificial intelligence may soon enable researchers to generate high-quality science at a previously unimaginable speed.
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Kenneth Harris @kenneth-harris.bsky.social · 26/05/2026
AI is about to transform how scientific research happens, and neuroscience is no exception. What the future looks like is up to us. I don’t have the answers; here are some thoughts from working on the IBL AI agent. Aiming to start a discussion.
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Jaeeon Lee @jel0624.bsky.social · 01/07/2026
I’m honored to be recognized by the @AsteraInstitute as one of the highlighted essays in the essay competition! If you’re interested, I’d love for you to give it a read and share your thoughts! astera.org/essay-compet...
astera.org
Essay Competition - Final
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Max Kozlov @maxkozlov.bsky.social · 14/05/2026
NEW: A serious staffing shortage — of the Trump admin's own making — is delaying the agency's ability to send billions to universities around the country, leaving labs reeling in the meantime. “I thought we were at rock bottom”, a senior NIH official said. “We are below rock bottom now.”
nature.com
NIH staffing shortage could slash number of new grants issued this year
Some units at the US funding giant are so understaffed, they are focusing on mandated grant renewals rather than new awards.
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Jay Hennig @jhennig.bsky.social · 05/05/2026
🥳 Super excited to share our lab's first preprint, led by @hungyun.bsky.social "Distinct tasks engage shared neural subspaces in human hippocampus and anterior cingulate cortex" www.biorxiv.org/content/10.6... 🧵(1/9)
biorxiv.org
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Andrew MacAskill @macaskillaf.bsky.social · 26/04/2026
Huge congrats to @snierwetberg.bsky.social , David (not on BSky), and @maxwellxchen.bsky.social for their paper! They developed a mouse task in which relational structure can be isolated from cue identity and reward statistics. www.biorxiv.org/content/10.6... 🧠📈🧪 #neuroskyence @uclnpp.bsky.social
biorxiv.org
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Jeremy Day @daylab.bsky.social · 24/04/2026
New preprint led by recent PhD graduate Dalton Fitzgerald characterizing two distinct populations of VTA dopamine neurons that differ in ion channel expression, intrinsic excitability, and response to drugs of abuse. www.biorxiv.org/content/10.6...
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Deepa Rajan, PhD @deeparajan.bsky.social · 23/04/2026
How can a single cell learn without a brain? We explore this in my paper with @wallaceucsf.bsky.social! We discovered that single cells may learn using molecules similar to those that animal brains use to learn, like CaMKII. Cells can also propagate memory states to their progeny!
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Sam Gershman @gershbrain.bsky.social · 21/04/2026
New work w/ Zach Kelso and @madeleinecsnyder.bsky.social www.biorxiv.org/content/10.6... Our negative results on classical conditioning in planarian flatworms. This was surprising, given the long history of work (including sensational findings of memory transfer and retention through decapitation).
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Natalie Christie Peluso 🧠 @nataliepeluso.com · 18/04/2026
"Although animals in natural environments accumulate a wide range of experiences that allow them to calibrate threat assessment, most behavioral studies of anxiety rely on laboratory animals housed in static, impoverished conditions." 🔥 www.cell.com/current-biol...
cell.com
Transfer to a naturalistic setting restructures fear responses in laboratory mice
Zipple et al. show that transferring laboratory mice to naturalistic outdoor enclosures prevents and even reverses a canonical anxiety phenotype in rodents. The findings underscore the value of studyi...
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Jay Hennig @jhennig.bsky.social · 15/04/2026
New paper in collaboration with @mhburrell.bsky.social @naoshigeuchida.bsky.social and @gershbrain.bsky.social ! "Phasic dopamine drives conditioned responding beyond its role in learning" 🧵 (1/8) www.biorxiv.org/content/10.6...
biorxiv.org
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Adam Carter @carterlab.bsky.social · 13/04/2026
Pleased to share our new study showing how different cell types in the paratenial thalamus interact with the medial prefrontal cortex and other brain regions, all done by my graduate student Nigel Dao: www.biorxiv.org/content/10.6...
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Jeremiah Cohen @jeremiahycohen.bsky.social · 13/04/2026
Delighted to share our discoveries about one of the brain's neurotransmitter systems: www.biorxiv.org/content/10.6... Together with colleagues at the @alleninstitute.org, we have learned a lot about a tiny cluster of neurons in the brainstem locus coeruleus (LC) that releases norepinephrine (NE). 1
biorxiv.org
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Robb Rutledge @robbrutledge.bsky.social · 09/04/2026
New this year: free trainee pre-conference on July 13 organized by @cehaeffner.bsky.social @adanyajohnson.bsky.social Pre-conference tickets are free for main conference attendees but space is limited to 75 people so register early! www.cpconf.org/faq-cpconf20...
cpconf.org
FAQ — #cpconf2026
The Computational Psychiatry Pre-Conference is a one-day workshop and symposium (approximately 10:00 AM–6:30 PM) designed to prepare early-career researchers for the main conference while fostering collaboration and skill-building.
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Columbia University's Zuckerman Institute @zuckermanbrain.bsky.social · 19/03/2026
How can machines achieve the kind of flexible learning mastered by our brains? That’s what our own @neurokim.bsky.social is trying to find out! Learn more about ARNI’s work on natural and artificial intelligence: youtu.be/gM8YCaiAWrc?... #BrainAwarenessWeek
youtu.be
ARNI: Memory Driven Learning with Kim Stachenfeld
YouTube video by Columbia Engineering
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Sam Gershman @gershbrain.bsky.social · 29/03/2026
@jhennig.bsky.social has shown that dopamine exerts a real-time effect on conditioned responding, beyond its role in learning: www.biorxiv.org/content/10.6... Another indication that dopamine is more than a learning signal! A joint effort with @naoshigeuchida.bsky.social and @mhburrell.bsky.social.
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Constantinople lab @constantinoplelab.bsky.social · 25/03/2026
Thrilled to share our new paper, which shows that the relative timing of cholinergic and dopamine release dynamically gates whether dopamine acts as an RPE for in vivo plasticity and reinforcement learning. www.nature.com/articles/s41...
nature.com
Acetylcholine demixes heterogeneous dopamine signals for learning and moving
Nature Neuroscience - Jang et al. measured dopamine and acetylcholine release in the striatum of rats performing a decision-making task and found that the relative timing of cholinergic and...
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John Tuthill @tuthill.bsky.social · 24/03/2026
🧵 New preprint led by @bingbrunton.bsky.social, @elliottabe.bsky.social, @lawrencehu.bsky.social We gave a worm brain control of a fly body and it walked What did we learn? Nothing, other than deep reinforcement learning is effective We call it the digital sphinx www.biorxiv.org/content/10.6...
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David Sussillo @sussillodavid.bsky.social · 17/11/2025
A remarkable journey of resilience and transformation, from the chaotic corridors of group homes to the halls of Columbia and Stanford, EMERGENCE is a coming-of-age tale where heartbreak and humor meet the scientific wonder of modern artificial intelligence. 🔗 Preorder: tinyurl.com/fzcxb5ea
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Fabricio Nicola @fabricionicola.bsky.social · 14/03/2026
Mammals have hundreds of joints and muscles. Controlling them individually would be nearly impossible. How does the nervous system organize such complexity into coherent actions? Our new study explores this question through a natural behavior: jumping.
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stefanofusi.bsky.social @stefanofusi.bsky.social · 11/03/2026
The deadline for applying to the Methods in Computational Neuroscience summer course at MBL in Woods Hole is approaching (March 16)! An exciting course with an amazing lineup of lecturers in a beautiful location www.mbl.edu/education/ad...
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Renato Duarte @rcfduarte.bsky.social · 11/03/2026
I tracked every keyword in 22 years of Cosyne abstracts to map how computational neuroscience evolved — from Bayesian brains to neural manifolds to LLMs — and where it's heading next.
open.substack.com
22 years of Brain Science: what CoSyNe tells us about the evolution of Neuroscience
Tracking the intellectual DNA of Computational and Systems Neuroscience through its flagship meeting
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Jaeeon Lee @jel0624.bsky.social · 11/03/2026
Come check out our poster at Cosyne 2026, on Thursday! Plasticity vs dynamics, RNN with online learning rule, inference based on structure and many other ideas! BioRiv paper: www.biorxiv.org/content/10.6...
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Alison Preston @aliprestonphd.bsky.social · 06/03/2026
Every time you experience something new, your brain faces a decision: Should it update an existing memory or create a new one? In our new paper in @sfnjournals.bsky.social #JNeurosci, we isolate that exact decision, moment-by-moment during learning 🧵
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Rebecca Jordan @beckyjordan.bsky.social · 05/03/2026
First preprint from the lab! Using intracellular recordings & analysis of 2-photon imaging data, we show that spiking & neuromodulatory input during experience drive a reorganization of visuomotor inputs in V1 layer 2/3 neurons, consistent with enhanced visuomotor cancellation - bioRxiv link below.
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The Transmitter @thetransmitter.bsky.social · 02/03/2026
Broad peer review is crucial for a healthy scientific literature, but neuroscientists turn down review requests too often. Simple math suggests that small groups of scientists can significantly bias the literature, writes @jvoigts.bsky.social. #neuroskyence www.thetransmitter.org/publishing/l...
thetransmitter.org
Lack of reviewers threatens robustness of neuroscience literature
Simple math suggests that small groups of scientists can significantly bias peer review.
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Konrad Kording @kordinglab.bsky.social · 26/02/2026
This paper on how the brain may do gradient descent is very cool: www.nature.com/articles/s41...
nature.com
Vectorized instructive signals in cortical dendrites - Nature
Mice learning a neurofeedback brain–computer interface task show neuron-specific teaching signals in cortical dendrites, consistent with a vectorized solution for credit assignment in the brain.
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Jaeeon Lee @jel0624.bsky.social · 21/02/2026
🚨🚨New Preprint Alert!🚨🚨 www.biorxiv.org/content/10.6... Animal learning is painfully slow (at least initially). Yet, well trained animals can learn very fast, sometimes displaying few-shot inference. How does this transition occur?
biorxiv.org
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