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Guillaume Bellec

@bellecguill

AI, Neuroscience and Music

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29.09.2023
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Latest posts by Guillaume Bellec @bellecguill

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Biological Laboratory | LEGO® Ideas This is a two-floor realistic Biological Laboratory building. In this design, I try to tell stories about biologists, introduce biology concepts to general publ…

I just made an account and voted for this biology laboratory made of LEGO to "promote biological research and inspire more people into the world of biology". They need 10K votes. Reposting and/or voting below would be helpful. 🤗
beta.ideas.lego.com/product-idea...

16.10.2025 08:07 👍 221 🔁 131 💬 8 📌 12
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Episode #38 in #TheoreticalNeurosciencePodcast: On extracting spiking network models from experiments - with Richard Gao @rdgao.bsky.social

theoreticalneuroscience.no/thn38

How to fit spiking network models to experimental data when there is no unique parameter set giving the best fit.

28.02.2026 08:06 👍 36 🔁 9 💬 0 📌 1
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snn-mnist-conversion/single_layer.py at 23d83e4304c70584cb4986f8522954a8b4d14af7 · kaurarmanjot445-sys/snn-mnist-conversion Time-to-first-spike SNN conversion for MNIST - exact gradient equivalence implementation - kaurarmanjot445-sys/snn-mnist-conversion

For the curious ones. This line explains well how to simulate the deep spiking SNN with exact equivalence:
github.com/kaurarmanjot...

27.02.2026 11:54 👍 1 🔁 0 💬 0 📌 0
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GitHub - kaurarmanjot445-sys/snn-mnist-conversion: Time-to-first-spike SNN conversion for MNIST - exact gradient equivalence implementation Time-to-first-spike SNN conversion for MNIST - exact gradient equivalence implementation - kaurarmanjot445-sys/snn-mnist-conversion

Very refreshing interaction with the undergrad student form India @kaurarmanjot445.bsky.social ! 🧪 🧠

She was interested in our math equivalence between spike timing and deep relu nets

With a short call and few emails she reproduced the work and open sourced a turorial
github.com/kaurarmanjot...

27.02.2026 10:40 👍 12 🔁 3 💬 1 📌 0
Stagiaire de niveau Master, France / Master Level Intern, France Grenoble, France ; Paris, France

🚨 🔬 PhD positions at Google DeepMind in France 🇫🇷

We are advertising Master Level Intern positions at Google DeepMind within our Frontier AI Unit.

These could lead to co-advised PhD positions with Google DeepMind and French academic institutions.

job-boards.greenhouse.io/deepmind/job...

16.02.2026 12:41 👍 30 🔁 17 💬 2 📌 0

If you work at the intersection of computational neuroscience and machine learning, consider applying for this postdoc position (January 2027 start date):
academicpositions.harvard.edu/postings/15868
An opportunity to work with a great group of people across Harvard, MIT, and UC Berkeley.

10.02.2026 19:36 👍 73 🔁 49 💬 3 📌 2
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Modelling multiple sclerosis in a dish to test therapeutics at University of Glasgow on FindAPhD.com PhD Project - Modelling multiple sclerosis in a dish to test therapeutics at University of Glasgow, listed on FindAPhD.com

PhD Alert! We’re recruiting for a new, fully-funded #Neuroskyence PhD studentship to model multiple sclerosis in vitro, combining immunology with ephys. Led by the awesome @juliae.bsky.social
Please repost.

www.findaphd.com/phds/project...

03.02.2026 19:23 👍 8 🔁 5 💬 0 📌 0
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FENS-Chen Institute Summer Program on AI-Accelerated Neuroscience Discovery and Translation hosted by the University of Cambridge - Federation of European Neuroscience Societies Application Submission Deadline: Monday 16th February 2026, midnight Applications will be open from Thursday 8th January to midnight on Monday 16th February. The application form and further details…

Summer school on Neuro AI in Cambridge.

Registration Deadline: 16 Feb 2026

Speaker line up:
G. Bellec
A. Billard
R. Bogacz
R. Ponte Costa
W. Gerstner
M. Giugliano
L. Hunt
M. Sahani
P. Series
P. Tino
www.fens.org/news-activit...

30.01.2026 16:46 👍 9 🔁 2 💬 0 📌 0

I highly recommend this postdoc position in Paris.

Joao is amazing and it's a unique opportunity to do serious computational/ML analysis with human brain recordings in vivo. 🧪 🧠

27.01.2026 22:48 👍 7 🔁 1 💬 0 📌 0
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These days I drink Iranian tea everyday so I don't forget.

Media coverage of these events have been very poor in my internet bubble so far.

26.01.2026 13:29 👍 16 🔁 2 💬 0 📌 0

Come join us for this first worshop of a three part series on the computational ingredients of reasoning in minds and AI. Reasoning is a complex term, especially in light of an exploding category of methods in LLMs. These workshops will explore reasoning’s multiple facets.

20.01.2026 22:34 👍 12 🔁 3 💬 0 📌 0

I always have an issue with self proclaimed "foundation models in X".

A key defining feature of a foundation model is adoption by a community of users. If nobody has built on top of it. It's no foundation

13.01.2026 23:30 👍 3 🔁 1 💬 0 📌 0

Neuromorphic camera for neural recordings 🤩🤩

So spiking cameras enabling sub millisecond optical imaging. Potentially enabling to record... Spikes? 🐸

Science history is just so ironic sometimes (50 years to close the loop)

10.01.2026 18:14 👍 10 🔁 0 💬 0 📌 0

Hi thanks for reaching out.

Mostly I don't hire research assistants with a bachelor.

But please write me an email at first.last@tuwien.ac.at, and explain what your intentions are.

10.01.2026 08:56 👍 0 🔁 0 💬 0 📌 0

I have had existential thoughts about large dt with biological neuron simulations too.

But now I start to wonder: if the model is not fitted on intra cellular recording. Does dt < 1ms make any sense really?

02.01.2026 19:48 👍 1 🔁 0 💬 1 📌 0

The kind of concept you hear once and you never forget.

If you know what the electrode records. You know what it stimulates.

27.12.2025 21:17 👍 5 🔁 0 💬 1 📌 0
Paris NeuroCourse | Optical Imaging and Electrophysiological Recording in Neuroscience

Applications are open for the 2026 Paris Spring School of Imaging and Electrophysiology! It’s a great way to discover Paris (❤️) while learning a pretty wide range of techniques for neuroscience, in a fantastic environment. Share widely: parisneuro.ovh

24.12.2025 09:20 👍 5 🔁 3 💬 0 📌 0
Examples of sequences of activity seen in multiple regions of the brain

Examples of sequences of activity seen in multiple regions of the brain

Sequences are everywhere! In every brain region. And are written in stone.

Invariant Activity Sequences Across the Mouse Brain.

Out today, by Célian Bimbard, with @kenneth-harris.bsky.social.

Based on data by Célian and by @intlbrainlab.bsky.social.

www.biorxiv.org/content/10.6...

22.12.2025 11:59 👍 79 🔁 23 💬 3 📌 1

Very important

20.12.2025 09:47 👍 14 🔁 2 💬 0 📌 0
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Point of no returns: researchers are crossing a threshold in the fight for funding With so little money to go round, the costs of competing for grants can exceed what the grants are worth. When that happens, nobody wins.

This report in Nature on the costs of competing for & administering scientific grants is shocking: "In other words, European taxpayers will have spent more on the funding process than on the funding itself, and the scientific ecosystem has been drained." www.nature.com/articles/d41... 🧪

19.12.2025 18:46 👍 424 🔁 240 💬 8 📌 45

Congrats 👏🎉

19.12.2025 12:33 👍 1 🔁 0 💬 0 📌 0

🔬 We're hiring a Junior Group Leader for Data-Driven Digital Twins/System Models in medicine/life sciences at @uni_goettingen! Perfect opportunity for early-career researchers who want to:
- Lead their own research group
- Work at the intersection of AI, simulation, and biomedicine

19.12.2025 08:02 👍 15 🔁 16 💬 1 📌 1

Our paper on data constrained RNN that generalize to optogenetic perturbations now citable on eLife:
doi.org/10.7554/eLif...

18.12.2025 23:07 👍 43 🔁 18 💬 1 📌 2
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We should just use standardized test scores + grades to admit students into college.

Everything else is way too easy to game, allowing the extremely rich to dominate access to prestigious colleges. www.nytimes.com/interactive/...

I've been saying this for a long time, but the data makes it clear.

06.12.2025 18:07 👍 37 🔁 17 💬 3 📌 0

Is there a version without the pay wall?

06.12.2025 12:23 👍 0 🔁 0 💬 1 📌 0
Image of robots struggling with a social dilemma.

Image of robots struggling with a social dilemma.

1/ Why does RL struggle with social dilemmas? How can we ensure that AI learns to cooperate rather than compete?

Introducing our new framework: MUPI (Embedded Universal Predictive Intelligence) which provides a theoretical basis for new cooperative solutions in RL.

Preprint🧵👇

(Paper link below.)

03.12.2025 19:19 👍 65 🔁 27 💬 5 📌 6
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How I contributed to rejecting one of my favorite papers of all time I believe we should talk about the mistakes we make.

How I contributed to rejecting one of my favorite papers of all times, Yes, I teach it to students daily, and refer to it in lots of papers. Sorry. open.substack.com/pub/kording/...

02.12.2025 01:27 👍 119 🔁 28 💬 1 📌 10
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Our contribution to a global environmental standard for AI Mistral have released environmental impact numbers for their largest model, Mistral Large 2, in more detail than I have seen from any of the other large AI labs. The methodology …

The big AI labs continue to be infuriatingly opaque about the actual figures for their total electricity and water consumption

The best report I have seen from them so far is this one from Mistral in July, but it still left unanswered questions for me simonwillison.net/2025/Jul/22/...

29.11.2025 15:56 👍 32 🔁 4 💬 3 📌 0

Desk rejection is ok because it's quick

28.11.2025 11:04 👍 3 🔁 0 💬 0 📌 0

My initial point was about the moving frontier of knowledge in G2.5 and G3. Locating correctly areas was mind blowing to me.

I got fooled by the primate Brian with a mouse olfactory bulb. I cannot hide my poor knowledge of mouse anatomy. But I will continue to work in comp neuro if you allow me

21.11.2025 15:00 👍 0 🔁 0 💬 0 📌 0