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Tim Behrens

@behrenstimb.bsky.social

Slowly becoming a neuroscientist. EiC @elife.bsky.social

3,892 Followers  |  231 Following  |  409 Posts  |  Joined: 13.11.2024  |  2.1219

Latest posts by behrenstimb.bsky.social on Bluesky

We will consider anyone but you will need to convince us you can lead a program that will link the world class systems neuro at SWC with human ephys work in London and more globally,

13.02.2026 21:07 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
We're hiring! This is a unique opportunity to translate our understanding of neural computation - from circuit-level mechanisms to computational principles -  into the human brain, through the establishment of cutting-edge human neural recording capabilities with collaborators in London and abroad.

We're hiring! This is a unique opportunity to translate our understanding of neural computation - from circuit-level mechanisms to computational principles - into the human brain, through the establishment of cutting-edge human neural recording capabilities with collaborators in London and abroad.

We’re hiring a Group Leader!

Join us to lead a transformative initiative in human systems neuroscience.

Find out more and apply ‡️

www.sainsburywellcome.org/content/curr...

13.02.2026 13:41 β€” πŸ‘ 2    πŸ” 7    πŸ’¬ 1    πŸ“Œ 1

Awesome new opportunity to join SWC if you are into human ephys.

13.02.2026 18:05 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 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 β€” πŸ‘ 64    πŸ” 48    πŸ’¬ 2    πŸ“Œ 2
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At eLife, we have always prioritised quality, constructive reviews.

Today, peer review is part of the paper. Reviews are published as soon as they're in, rejection doesn’t follow review, and the focus stays on strengthening the science in a way that works for authors.
@oxfordpsychiatry.bsky.social

05.02.2026 19:25 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Why don’t neural networks learn all at once, but instead progress from simple to complex solutions? And what does β€œsimple” even mean across different neural network architectures?

Sharing our new paper @iclr_conf led by Yedi Zhang with Peter Latham

arxiv.org/abs/2512.20607

03.02.2026 16:19 β€” πŸ‘ 151    πŸ” 41    πŸ’¬ 7    πŸ“Œ 3
A functional influence based circuit motif that constrains the set of plausible algorithms of cortical function There are several plausible algorithms for cortical function that are specific enough to make testable predictions of the interactions between functionally identified cell types. Many of these algorithms are based on some variant of predictive processing. Here we set out to experimentally distinguish between two such predictive processing variants. A central point of variability between them lies in the proposed vertical communication between layer 2/3 and layer 5, which stems from the diverging assumptions about the computational role of layer 5. One assumes a hierarchically organized architecture and proposes that, within a given node of the network, layer 5 conveys unexplained bottom-up input to prediction error neurons of layer 2/3. The other proposes a non-hierarchical architecture in which internal representation neurons of layer 5 provide predictions for the local prediction error neurons of layer 2/3. We show that the functional influence of layer 2/3 cell types on layer 5 is incompatible with the hierarchical variant, while the functional influence of layer 5 cell types on prediction error neurons of layer 2/3 is incompatible with the non-hierarchical variant. Given these data, we can constrain the space of plausible algorithms of cortical function. We propose a model for cortical function based on a combination of a joint embedding predictive architecture (JEPA) and predictive processing that makes experimentally testable predictions. ### Competing Interest Statement The authors have declared no competing interest. Swiss National Science Foundation, https://ror.org/00yjd3n13 Novartis Foundation, https://ror.org/04f9t1x17 European Research Council, https://ror.org/0472cxd90, 865617

Our work with @georgkeller.bsky.social on testing predictive processing (PP) models in cortex is out on biorvix now! www.biorxiv.org/content/10.6... A short thread on our findings and thoughts on where we should move on from PP below.

30.01.2026 14:37 β€” πŸ‘ 35    πŸ” 12    πŸ’¬ 2    πŸ“Œ 1

This is super cool!

30.01.2026 18:26 β€” πŸ‘ 11    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

We think cortex might function like a JEPA. It looks like prediction errors in layer 2/3 are not computed against input (as is the idea in predictive processing), but against a representation in latent space (i.e. like in a JEPA arxiv.org/abs/2301.08243 or RPL doi.org/10.1101/2025...).

30.01.2026 14:51 β€” πŸ‘ 36    πŸ” 10    πŸ’¬ 2    πŸ“Œ 2

Let me believe it’s magic for at least a year before you show me how it works please!

28.01.2026 21:27 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

The supplementary videos for this preprint are fantastic. Some wild examples of decoding the animal's attentional focus and/or intent
www.biorxiv.org/content/10.6...

28.01.2026 14:04 β€” πŸ‘ 21    πŸ” 5    πŸ’¬ 0    πŸ“Œ 1

This is totally wild. Remember the object they are attending to is presented egocentrically, but the allocentric theta sweeps follow it. The whole system is wired up to provide something like an "integrated attention reflex".

28.01.2026 10:28 β€” πŸ‘ 36    πŸ” 5    πŸ’¬ 2    πŸ“Œ 0
Localizing the brain systems involved in geometric shape perception.

Localizing the brain systems involved in geometric shape perception.

A geometric shape regularity effect in the human brain.

πŸ”— buff.ly/4UsILev

27.01.2026 16:11 β€” πŸ‘ 9    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
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Authors can now include video explainers in their papers with eLife!

Take a look at our first example from @mathiassablemeyer.bsky.social in β€˜A geometric shape regularity effect in the human brain’
buff.ly/LzvvVb9

26.01.2026 23:28 β€” πŸ‘ 16    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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Unpicking the second Minneapolis shooting frame by frame BBC Verify has analysed footage of the shooting from multiple angles, piecing together a detailed picture of what happened.

www.bbc.co.uk/news/videos/...

(BBC verify is known for clear fact-based analysis without any political angle).

26.01.2026 18:22 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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*Multi-region computations in the brain*
When two regions are better than one...
doi.org/10.1016/j.ne...
#neuroskyence

23.01.2026 18:14 β€” πŸ‘ 50    πŸ” 14    πŸ’¬ 2    πŸ“Œ 0

Dick you need to read the paper! This paper goes way beyond the monkey data in understanding the interregional interactions. It fits a multi-regional network model which makes a host of very precise predictions and then it tests them in fresh optogenetic experiments!

24.01.2026 16:34 β€” πŸ‘ 7    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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At @elife.bsky.social you can now include explainer videos with every figure. Like going to a seminar while you engage with the paper. First example here elifesciences.org/articles/106...

Click the arrows next to each figure to get a video of @mathiassablemeyer.bsky.social explaining it for you!

22.01.2026 18:16 β€” πŸ‘ 108    πŸ” 22    πŸ’¬ 3    πŸ“Œ 6
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On research careers in academia and industry The epilogue to a series on Cognitive Science and AI

Should you go to academia or industry for research in AI or cognitive science? It's the most common question I get asked by PhD students, and I've written up some of my thoughts on the answer, as an epilogue to my research-focused series on these fields: infinitefaculty.substack.com/p/on-researc...

23.01.2026 15:13 β€” πŸ‘ 49    πŸ” 13    πŸ’¬ 0    πŸ“Œ 3

Just to add though, that in general the @elife.bsky.social model does not allow reviewers to gatekeep what authors say, only to comment on it. So if we did peer review the videos, it would be same for these.

23.01.2026 16:55 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

yes it totally changes the vibe when everyone is thinking of nice things to say!

23.01.2026 15:58 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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We have decided not to peer review the videos at the moment, and to explicitly declare under the videos that they are not peer reviewed for scientific content (see below). They are vetted by journal staff for taste etc. But we are open to discussion about this. We can see advantages both ways.

23.01.2026 15:56 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

@elife.bsky.social ftw!!

23.01.2026 14:38 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

These videos are much much easier to produce and maintain. We're hoping people use them. We have a paper under review right now, and we have made them :)

23.01.2026 15:00 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

:) Executable articles are exciting and still a priority, but the way we implemented them last time was too difficult for the authors and maintainers. We have discontinued them in the short term. There are actually new platforms that look much better though, so we may be back in the game soon.

23.01.2026 14:58 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Not sure if you're being serious :). It seems to suggest you need 200-700 plots per paper .....

23.01.2026 14:00 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I like journal clubs where you are only allowed to say positive things about a paper. They are so much more satisfying.

23.01.2026 08:51 β€” πŸ‘ 36    πŸ” 6    πŸ’¬ 2    πŸ“Œ 0

very useful and a step towards the publication of the future.

If you think about it, it's kind of ridiculous that we're still stuck with what is basically a digitized version of a printed paper rather than using the vast possibilities of the web

23.01.2026 08:39 β€” πŸ‘ 9    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

Such a great idea!

22.01.2026 22:35 β€” πŸ‘ 2    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

I knew you weren’t human!

22.01.2026 21:54 β€” πŸ‘ 9    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

@behrenstimb is following 20 prominent accounts