Joao Barbosa
@jbarbosa.org
INSERM group leader @ Neuromodulation Institute and NeuroSpin (Paris) in computational neuroscience.
How and why are computations enabling cognition distributed across the brain?
Expect neuroscience and ML content.
jbarbosa.org
How and why are computations enabling cognition distributed across the brain?
Expect neuroscience and ML content.
jbarbosa.org
Pinned
Joao Barbosa
@jbarbosa.org
· Feb 2
A good time to repost this banger from 'The Responsibility of Intellectuals' by Noam Chomsky in '67
Vance is absolutely correct: universities are - and must be - the enemy.
This is why the Right is attacking scholarship globally. They want to end the privilege Chomsky's talking about in 67
Vance is absolutely correct: universities are - and must be - the enemy.
This is why the Right is attacking scholarship globally. They want to end the privilege Chomsky's talking about in 67
Thank you Nicole!
Nicole's wonderful book 'Elusive Cures' has played an important role in pushing me out of my comfort zone and join forces w/ @philippedomenech.bsky.social and @bellecguill.bsky.social, here.
Exciting times ahead for neuroscience.
Go read it, if you haven't yet!
Nicole's wonderful book 'Elusive Cures' has played an important role in pushing me out of my comfort zone and join forces w/ @philippedomenech.bsky.social and @bellecguill.bsky.social, here.
Exciting times ahead for neuroscience.
Go read it, if you haven't yet!
January 28, 2026 at 9:00 AM
Thank you Nicole!
Nicole's wonderful book 'Elusive Cures' has played an important role in pushing me out of my comfort zone and join forces w/ @philippedomenech.bsky.social and @bellecguill.bsky.social, here.
Exciting times ahead for neuroscience.
Go read it, if you haven't yet!
Nicole's wonderful book 'Elusive Cures' has played an important role in pushing me out of my comfort zone and join forces w/ @philippedomenech.bsky.social and @bellecguill.bsky.social, here.
Exciting times ahead for neuroscience.
Go read it, if you haven't yet!
Reposted by Joao Barbosa
New paper out at PNAS: www.pnas.org/doi/10.1073/...
Revisiting the high-dimensional geometry of population responses in the visual cortex with @jpillowtime.bsky.social. The review took forever because a reviewer was doubtful our new estimator can infer eigenvalues beyond the rank of the data! (1/6)
Revisiting the high-dimensional geometry of population responses in the visual cortex with @jpillowtime.bsky.social. The review took forever because a reviewer was doubtful our new estimator can infer eigenvalues beyond the rank of the data! (1/6)
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
www.pnas.org
January 27, 2026 at 4:34 PM
New paper out at PNAS: www.pnas.org/doi/10.1073/...
Revisiting the high-dimensional geometry of population responses in the visual cortex with @jpillowtime.bsky.social. The review took forever because a reviewer was doubtful our new estimator can infer eigenvalues beyond the rank of the data! (1/6)
Revisiting the high-dimensional geometry of population responses in the visual cortex with @jpillowtime.bsky.social. The review took forever because a reviewer was doubtful our new estimator can infer eigenvalues beyond the rank of the data! (1/6)
Reposted by Joao Barbosa
If you are interested in eigenvalues consider applying MEME: github.com/dapospisil/r...
Special thanks to @computingnature.bsky.social for practicing open science and feedback!
And if you want to work on high-d estimators (or connectomes, mechanistic model inference) come join me at UIUC! (6/6)
Special thanks to @computingnature.bsky.social for practicing open science and feedback!
And if you want to work on high-d estimators (or connectomes, mechanistic model inference) come join me at UIUC! (6/6)
GitHub - dapospisil/revisit_hid_geom: code to reproduce figures from 'Revisiting the High-Dimensional Geometry of Population Responses in Visual Cortex'
code to reproduce figures from 'Revisiting the High-Dimensional Geometry of Population Responses in Visual Cortex' - dapospisil/revisit_hid_geom
github.com
January 27, 2026 at 4:34 PM
If you are interested in eigenvalues consider applying MEME: github.com/dapospisil/r...
Special thanks to @computingnature.bsky.social for practicing open science and feedback!
And if you want to work on high-d estimators (or connectomes, mechanistic model inference) come join me at UIUC! (6/6)
Special thanks to @computingnature.bsky.social for practicing open science and feedback!
And if you want to work on high-d estimators (or connectomes, mechanistic model inference) come join me at UIUC! (6/6)
Reposted by Joao Barbosa
Amazing postdoc opportunity!
Postdoc position in Paris: come help develop new generation human brain computer interfaces ⚡🧠💻
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
January 27, 2026 at 11:54 PM
Amazing postdoc opportunity!
Reposted by Joao Barbosa
Seems like a dream postdoc opportunity! Such a cool project, team and city
Postdoc position in Paris: come help develop new generation human brain computer interfaces ⚡🧠💻
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
January 27, 2026 at 10:19 PM
Seems like a dream postdoc opportunity! Such a cool project, team and city
Reposted by Joao Barbosa
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. 🧪 🧠
Joao is amazing and it's a unique opportunity to do serious computational/ML analysis with human brain recordings in vivo. 🧪 🧠
Postdoc position in Paris: come help develop new generation human brain computer interfaces ⚡🧠💻
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
January 27, 2026 at 10:48 PM
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. 🧪 🧠
Joao is amazing and it's a unique opportunity to do serious computational/ML analysis with human brain recordings in vivo. 🧪 🧠
Postdoc position in Paris: come help develop new generation human brain computer interfaces ⚡🧠💻
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
January 27, 2026 at 10:12 PM
Postdoc position in Paris: come help develop new generation human brain computer interfaces ⚡🧠💻
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems.
See below for + details and retweet 🙏
Reposted by Joao Barbosa
Very exciting to share that @climatecentral.org is hiring a Climate Data Scientist to join a new climate services effort focused on advancing predictions of risks and hazards on seasonal-to-decadal timescales. The application closes on February 9, 2026 at 5pm ET, & the description can be found here:
Climate Data Scientist | Climate Central
Climate Central is seeking a highly-skilled Climate Data Scientist to join our team. Reporting to the Vice President for Science, the scientist will be part of a new initiative in climate services to ...
www.climatecentral.org
January 26, 2026 at 5:36 PM
Very exciting to share that @climatecentral.org is hiring a Climate Data Scientist to join a new climate services effort focused on advancing predictions of risks and hazards on seasonal-to-decadal timescales. The application closes on February 9, 2026 at 5pm ET, & the description can be found here:
Reposted by Joao Barbosa
We are opening an investigation into Grok because we believe that X may have breached the DSA.
We have seen antisemitic content, non-consensual deepfakes of women, and child sexual abuse material.
In Europe, no company will make money by violating our fundamental rights.
link.europa.eu/Fh8h84
We have seen antisemitic content, non-consensual deepfakes of women, and child sexual abuse material.
In Europe, no company will make money by violating our fundamental rights.
link.europa.eu/Fh8h84
January 26, 2026 at 1:24 PM
We are opening an investigation into Grok because we believe that X may have breached the DSA.
We have seen antisemitic content, non-consensual deepfakes of women, and child sexual abuse material.
In Europe, no company will make money by violating our fundamental rights.
link.europa.eu/Fh8h84
We have seen antisemitic content, non-consensual deepfakes of women, and child sexual abuse material.
In Europe, no company will make money by violating our fundamental rights.
link.europa.eu/Fh8h84
Reposted by Joao Barbosa
Had the honor & pleasure to spend another week at @imbizo.bsky.social, meeting brilliant young talents from across the world. This week came to rescue me from the horror unfolding in my home country, Iran & reminded me the world is still vast & beautiful, despite the few who work so hard to ruin it.
We concluded Cycle 2 with a bang on Saturday! 💥
Dr. @athenaakrami.bsky.social delivered an incredible lecture on Hopfield networks and attractor dynamics. From memory storage and neural attractors to prior experience, it was the perfect end to the week.🧠📉
@simonsfoundation.org @ibroorg.bsky.social
Dr. @athenaakrami.bsky.social delivered an incredible lecture on Hopfield networks and attractor dynamics. From memory storage and neural attractors to prior experience, it was the perfect end to the week.🧠📉
@simonsfoundation.org @ibroorg.bsky.social
January 26, 2026 at 3:57 PM
Had the honor & pleasure to spend another week at @imbizo.bsky.social, meeting brilliant young talents from across the world. This week came to rescue me from the horror unfolding in my home country, Iran & reminded me the world is still vast & beautiful, despite the few who work so hard to ruin it.
Lets publish more untested predictions! they show real foresight, not posthoc model tweaking to fit observed data
I agree so long as the computational models make predictions that other models do not, and those predictions are then tested.
January 24, 2026 at 2:59 PM
Lets publish more untested predictions! they show real foresight, not posthoc model tweaking to fit observed data
Reposted by Joao Barbosa
We go around the room with 5 questions.
1) What did you like about the paper?
2) What did you learn?
3) What would you like to understand better?
4) What would you like to see to improve the paper?
5) What ideas did this spark for your research?
1) What did you like about the paper?
2) What did you learn?
3) What would you like to understand better?
4) What would you like to see to improve the paper?
5) What ideas did this spark for your research?
January 23, 2026 at 11:28 AM
We go around the room with 5 questions.
1) What did you like about the paper?
2) What did you learn?
3) What would you like to understand better?
4) What would you like to see to improve the paper?
5) What ideas did this spark for your research?
1) What did you like about the paper?
2) What did you learn?
3) What would you like to understand better?
4) What would you like to see to improve the paper?
5) What ideas did this spark for your research?
Reposted by Joao Barbosa
NeurIPS reviewers typically review 6+ papers, each with 100 or so citations. The reviewers can't possibly check that every citation is real. But why don't we have an automated way to do this checking (and desk-rejecting if fake citations found) *before* the papers are sent to reviewers?
NEW: NeurIPS,one of the world’s top academic AI conferences, accepted research papers with 100+ AI-hallucinated citations, new report claims
fortune.com/2026/01/21/n...
fortune.com/2026/01/21/n...
NeurIPS papers contained 100+ AI-hallucinated citations, new report claims | Fortune
An analysis of NeurIPS 2025 papers by startup GPTZero reveals how AI-generated citations are slipping into elite academic research.
fortune.com
January 21, 2026 at 8:49 PM
NeurIPS reviewers typically review 6+ papers, each with 100 or so citations. The reviewers can't possibly check that every citation is real. But why don't we have an automated way to do this checking (and desk-rejecting if fake citations found) *before* the papers are sent to reviewers?
Reposted by Joao Barbosa
I am very excited to share my first preprint🎉
The pandemic kicked off strongly during the first year of my PhD, and I had to stop the behavioral experiments when mice were starting to understand the task. At the BCB Lab, this showed us that training automation could be a real game changer (🧵1/10)
The pandemic kicked off strongly during the first year of my PhD, and I had to stop the behavioral experiments when mice were starting to understand the task. At the BCB Lab, this showed us that training automation could be a real game changer (🧵1/10)
The Training Village: an open platform for continuous testing of rodents in cognitive tasks https://www.biorxiv.org/content/10.64898/2026.01.12.698970v1
January 17, 2026 at 12:55 PM
I am very excited to share my first preprint🎉
The pandemic kicked off strongly during the first year of my PhD, and I had to stop the behavioral experiments when mice were starting to understand the task. At the BCB Lab, this showed us that training automation could be a real game changer (🧵1/10)
The pandemic kicked off strongly during the first year of my PhD, and I had to stop the behavioral experiments when mice were starting to understand the task. At the BCB Lab, this showed us that training automation could be a real game changer (🧵1/10)
Reposted by Joao Barbosa
A massive shoutout to our incredible mentors and TAs! 🙌
They delivered 6 wonderful tutorials. Their energy and dedication make this school special. 💻🧠 🇿🇦
@spiroschav.bsky.social | Will Dorrell | @kiradust.bsky.social | @isabelmaria-c.bsky.social | @colleenjg.bsky.social | @rherzoga.bsky.social
They delivered 6 wonderful tutorials. Their energy and dedication make this school special. 💻🧠 🇿🇦
@spiroschav.bsky.social | Will Dorrell | @kiradust.bsky.social | @isabelmaria-c.bsky.social | @colleenjg.bsky.social | @rherzoga.bsky.social
January 17, 2026 at 2:29 PM
A massive shoutout to our incredible mentors and TAs! 🙌
They delivered 6 wonderful tutorials. Their energy and dedication make this school special. 💻🧠 🇿🇦
@spiroschav.bsky.social | Will Dorrell | @kiradust.bsky.social | @isabelmaria-c.bsky.social | @colleenjg.bsky.social | @rherzoga.bsky.social
They delivered 6 wonderful tutorials. Their energy and dedication make this school special. 💻🧠 🇿🇦
@spiroschav.bsky.social | Will Dorrell | @kiradust.bsky.social | @isabelmaria-c.bsky.social | @colleenjg.bsky.social | @rherzoga.bsky.social
Reposted by Joao Barbosa
We are very excited to announce that our new preprint with Saleh Esteki, @stefanofusi.bsky.social, and @roozbehkiani.bsky.social is now available on biorxiv! www.biorxiv.org/content/10.6.... We investigated how reward context is learned, represented, and updated to bias decisions. Thread 🧵👇! 1/13
www.biorxiv.org
January 16, 2026 at 10:16 PM
We are very excited to announce that our new preprint with Saleh Esteki, @stefanofusi.bsky.social, and @roozbehkiani.bsky.social is now available on biorxiv! www.biorxiv.org/content/10.6.... We investigated how reward context is learned, represented, and updated to bias decisions. Thread 🧵👇! 1/13
Reposted by Joao Barbosa
📚 The international DIM C-BRAINS PhD program is back!
Up for grabs: 7 fully funded, 3-year doctoral contracts in the Île-de-France region, 3 of which will be hosted by Paris Brain Institute.
📆 Application deadline: February 1, 2026.
👉 Find out more: parisbraininstitute.org/dim-c-brains...
Up for grabs: 7 fully funded, 3-year doctoral contracts in the Île-de-France region, 3 of which will be hosted by Paris Brain Institute.
📆 Application deadline: February 1, 2026.
👉 Find out more: parisbraininstitute.org/dim-c-brains...
The DIM C-BRAINS international PhD program opens its 2026 call for applications. | Paris Brain Institute
The international DIM C-BRAINS PhD program is back. Up for grabs: 7 fully funded, 3-year doctoral contracts in the Île-de-France region, 3 of which will be hosted by the Institut du Cerveau. Applicati...
parisbraininstitute.org
December 5, 2025 at 5:04 PM
📚 The international DIM C-BRAINS PhD program is back!
Up for grabs: 7 fully funded, 3-year doctoral contracts in the Île-de-France region, 3 of which will be hosted by Paris Brain Institute.
📆 Application deadline: February 1, 2026.
👉 Find out more: parisbraininstitute.org/dim-c-brains...
Up for grabs: 7 fully funded, 3-year doctoral contracts in the Île-de-France region, 3 of which will be hosted by Paris Brain Institute.
📆 Application deadline: February 1, 2026.
👉 Find out more: parisbraininstitute.org/dim-c-brains...
Can't recommend this enough!
@kordinglab.bsky.social and I ran a summer school last year to help young profs (<5 yrs) in systems/comp neuro thrive.
compneurosci.com/Neuro4Pros/i...
It was great! Now we want to know if you'd be interested in participating if we did this again this year?
Let us know!
compneurosci.com/Neuro4Pros/i...
It was great! Now we want to know if you'd be interested in participating if we did this again this year?
Let us know!
Neuro4Pros summer school
Neuroscience Leadership Training
compneurosci.com
January 15, 2026 at 6:59 PM
Can't recommend this enough!
Reposted by Joao Barbosa
I am calling for a complete and total boycott of the Mercator projection in all news stories about Greenland until every member of the American public has seen this
January 13, 2026 at 5:32 PM
I am calling for a complete and total boycott of the Mercator projection in all news stories about Greenland until every member of the American public has seen this
Reposted by Joao Barbosa
If you'd like to study Computational Neuroscience in Berlin, don't miss this info event on Wednesday! 👉 bit.ly/4aX4Yc8 #CompNeuro #BernsteinNetwork
Information Day 2026 - "International Graduate Program(s) Computational Neuroscience" - BCCN
When: January 14th, 2026, 15:00-18:00 CET Where: BCCN Berlin Lecture Hall (Philippstr. 12, Haus 6, 10115 Berlin) & Live-streamed via Zoom Registration: Registration will open in December 2026.…
bit.ly
January 12, 2026 at 4:15 PM
If you'd like to study Computational Neuroscience in Berlin, don't miss this info event on Wednesday! 👉 bit.ly/4aX4Yc8 #CompNeuro #BernsteinNetwork
Reposted by Joao Barbosa
We extracted (parts of) 12 books in experiments with 4 frontier-lab, production LLMs.
We prompted the LLMs with a short prefix of a book and asked them to complete the rest. For Harry Potter and the Sorcerer’s Stone, we extracted 95.8% of the book from jailbroken Claude 3.7 Sonnet.
We prompted the LLMs with a short prefix of a book and asked them to complete the rest. For Harry Potter and the Sorcerer’s Stone, we extracted 95.8% of the book from jailbroken Claude 3.7 Sonnet.
January 7, 2026 at 8:31 PM
We extracted (parts of) 12 books in experiments with 4 frontier-lab, production LLMs.
We prompted the LLMs with a short prefix of a book and asked them to complete the rest. For Harry Potter and the Sorcerer’s Stone, we extracted 95.8% of the book from jailbroken Claude 3.7 Sonnet.
We prompted the LLMs with a short prefix of a book and asked them to complete the rest. For Harry Potter and the Sorcerer’s Stone, we extracted 95.8% of the book from jailbroken Claude 3.7 Sonnet.
Reposted by Joao Barbosa
Excited to be giving the van Vreeswijk Theoretical Neuroscience Seminar this Wednesday, Jan 14, where I'll talk about "Computation Through Neuronal-Synaptic Dynamics"!
www.wwtns.online
www.wwtns.online
Home | Neuroscience | World Wide Theoretical Neuroscience Seminar
WWTNS is a weekly digital seminar on Zoom targeting the theoretical neuroscience community. Its aim is to be a platform to exchange ideas among theoreticians.
www.wwtns.online
January 10, 2026 at 7:45 PM
Excited to be giving the van Vreeswijk Theoretical Neuroscience Seminar this Wednesday, Jan 14, where I'll talk about "Computation Through Neuronal-Synaptic Dynamics"!
www.wwtns.online
www.wwtns.online
Reposted by Joao Barbosa
Proud of being part of this great paper 🧪
#NEUmap: Large-scale mapping of artificial perceptions for neuroprostheses using spontaneous neuronal activity in macaque and human visual cortex www.brainstimjrnl.com/article/S193... by @lozaneuro.bsky.social et al.; #BCI #NeuroTech #blindness
January 10, 2026 at 3:34 PM
Proud of being part of this great paper 🧪
Reposted by Joao Barbosa
By the way, if you’re interested in working together on problems like this, I’m starting my lab at UCSF this summer. Get in touch if you’re interested in doing a postdoc! More info here: wj2.github.io/postdoc_ad (7/7)
W. Jeffrey Johnston - Postdoctoral position ad
wj2.github.io
January 9, 2026 at 7:06 PM
By the way, if you’re interested in working together on problems like this, I’m starting my lab at UCSF this summer. Get in touch if you’re interested in doing a postdoc! More info here: wj2.github.io/postdoc_ad (7/7)
Reposted by Joao Barbosa
📣 Pre-COSYNE Brainhack 2026 – Join Us in Lisbon! 🧠✨
March 10–11, 2026 • Lisbon, Portugal
pre-cosyne-brainhack.github.io/hackathon2026
Kick off COSYNE week with two days of hands-on, team-based hacking around real electrophysiology data!
✅ Apply now via the event website (limited spots).
March 10–11, 2026 • Lisbon, Portugal
pre-cosyne-brainhack.github.io/hackathon2026
Kick off COSYNE week with two days of hands-on, team-based hacking around real electrophysiology data!
✅ Apply now via the event website (limited spots).
January 9, 2026 at 11:09 AM
📣 Pre-COSYNE Brainhack 2026 – Join Us in Lisbon! 🧠✨
March 10–11, 2026 • Lisbon, Portugal
pre-cosyne-brainhack.github.io/hackathon2026
Kick off COSYNE week with two days of hands-on, team-based hacking around real electrophysiology data!
✅ Apply now via the event website (limited spots).
March 10–11, 2026 • Lisbon, Portugal
pre-cosyne-brainhack.github.io/hackathon2026
Kick off COSYNE week with two days of hands-on, team-based hacking around real electrophysiology data!
✅ Apply now via the event website (limited spots).