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Olivier Marre

@oliviermarre.bsky.social
417 followers 78 following 61 posts

Interested in retinal circuits and computations, vision, neuroscience, myopia, and vision restoration. Researcher at the Vision Institute in Paris.

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Reposted by Olivier Marre
Víctor Calbiague-García @victorcalbiagueg.bsky.social · 24/08/2026
Very happy to see that out paper is finally out in @pnas.org Please, take a look 🥳 www.pnas.org/doi/10.1073/...
pnas.org
The rod bipolar cell pathway contributes to surround responses in OFF retinal ganglion cells | PNAS
Sensory neurons can be influenced by stimuli beyond their receptive field center, yet the mechanisms underlying this surround modulation remain poo...
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Olivier Marre @oliviermarre.bsky.social · 07/06/2026
Nice work adding to the mounting evidence that the ON-OFF division is not so straightforward. It could explain why we could change the ON-OFF selectivity of ganglion cells by changing the visual context in this paper: www.nature.com/articles/s41...
nature.com
Context-dependent selectivity to natural images in the retina - Nature Communications
Ganglion cells classically respond to either light increase (ON) or decrease (OFF). Here, the authors show that during natural scene stimulation, a single ganglion cell can switch between ON and OFF d...
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Olivier Marre @oliviermarre.bsky.social · 04/05/2026
Talking about blue brain, digital twins and the likes: The danger of building a brain from scratch: trialsanderrors.substack.com/p/the-danger...
trialsanderrors.substack.com
The danger of building a brain from scratch
Having a model of the brain that works in many cases seems like a good idea. Is it really ?
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Olivier Marre @oliviermarre.bsky.social · 14/01/2026
How does our visual system process natural scenes ? How can we approach this question ? Happy to share this recent review written with Samuele Virgili where we ask these questions at the level of the retina. www.sciencedirect.com/science/arti...
sciencedirect.com
Retinal processing of natural scenes: challenges ahead
While substantial knowledge exists about the way the retina processes simple stimuli, our understanding of how the retina processes natural stimuli re…
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Arte-mise @arte-mise.bsky.social · 20/12/2025
Exposition Bridget Riley et Seurat au musée d’Orsay jusqu’au 26 janvier, l’artiste presque centenaire, gloire de l’art cinétique, eu la révélation des interactions des couleurs en copiant Seurat en 1959. L’occasion rare de faire l’expérience sensible des liens reliant ces 2 géants de la perception
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Pascal Mamassian @mamassian.bsky.social · 20/12/2025
This head is spinning continuously, but we see it rotating back and forth... ...presumably because of our strong prior expectation that faces are convex. This is a very nice example of the Hollow-Face illusion promoted by Richard Gregory: www.richardgregory.org/experiments/
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Webvision @webvision.bsky.social · 17/11/2025
Excellent work @victorcalbiagueg.bsky.social !!!
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Chiara Fornetto @chiarafornetto.bsky.social · 04/11/2025
Excited to share our paper now published in Cell! 'Zebrafish use spectral information to suppress the visual background' Huge thanks to @neurofishh.bsky.social & @teuler.bsky.social @cellpress.bsky.social @cp-cell.bsky.social 👇🏻 www.cell.com/cell/fulltex...
cell.com
Zebrafish use spectral information to suppress the visual background
Vertebrate eyes first evolved in water, where spectral content rapidly fades with distance. Zebrafish exploit this loss by antagonizing cone signals to suppress the background, pointing to distance es...
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Soile Nymark @snymark.bsky.social · 26/10/2025
This is really cool work! Congrats, Olivier, and the whole team!
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Olivier Marre @oliviermarre.bsky.social · 25/10/2025
Happy to share my first work with a connection to myopia, a collaboration with EssilorLuxottica www.science.org/doi/10.1126/...
science.org
Nonlinear spatial integration allows the retina to detect the sign of defocus in natural scenes
The retina can easily detect whether the eye is too small or too big thanks to the imperfections of the eye optics.
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Emily A-Izzeddin @emilya-izzeddin.bsky.social · 08/10/2025
The final bit of work from my PhD just got published at JOV! We looked at similarity judgements made for naturalistic image patches, and whether these are predicted by simple image statistics… (spoiler: yep!) Link to paper: doi.org/10.1167/jov.... 1/11
doi.org
Low-level features predict perceived similarity for naturalistic images | JOV | ARVO Journals
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Víctor Calbiague-García @victorcalbiagueg.bsky.social · 07/10/2025
11/n This way, this inhibition “piggybacks” on existing circuits. Revealing that the retina doesn’t build new circuits for every computation — it repurposes existing ones, using limited wiring to perform multiple computations efficiently. ♻️
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Víctor Calbiague-García @victorcalbiagueg.bsky.social · 07/10/2025
10/n Mechanistically, we propose that ON stimulation in the surround may trigger crossover inhibition that suppresses wide-field GABAergic amacrine cells—normally responsible for surround suppression—thereby disinhibiting distant OFF ganglion cells.
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Víctor Calbiague-García @victorcalbiagueg.bsky.social · 07/10/2025
6/n This setup let us directly stimulate individual rod bipolar cells while recording retinal output in real time. Result? Activating single RBCs drove responses in OFF ganglion cells far beyond their receptive field center 💥
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Víctor Calbiague-García @victorcalbiagueg.bsky.social · 07/10/2025
5/n So, to tackle this we combined: ✨ Optogenetics — to control specific neurons ✨ Two-photon holography — to activate single cells precisely ✨ Multi-electrode recordings — to monitor hundreds of ganglion cells simultaneously
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Víctor Calbiague-García @victorcalbiagueg.bsky.social · 07/10/2025
3/n Our hunch: a circuit best known for rod vision — the rod bipolar (RBC) → AII amacrine pathway — might also shape these surround responses under brighter conditions. 🌙➡️💡
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Víctor Calbiague-García @victorcalbiagueg.bsky.social · 07/10/2025
🚨 New preprint out from our lab! 📄 The Rod Bipolar Cell Pathway Contributes to Surround Responses in OFF Retinal Ganglion Cells 👉 www.biorxiv.org/content/10.1...
biorxiv.org
The Rod Bipolar Cell Pathway Contributes To Surround Responses In OFF Retinal Ganglion Cells
Sensory neurons can be influenced by stimuli beyond their receptive field center, yet the mechanisms underlying this surround modulation remain poorly understood. In the retina, many OFF ganglion cell...
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Tessa Dekker @tessamdekker.bsky.social · 27/09/2025
We’re hiring! We’re looking for two RAs to study neuroplasticity in sight loss, sight rescue and development in children and adults @ucl.ac.uk using a wide range of neuroimaging and behavioral methods. Please help spread the word! Apply by 16 Oct! t.ly/q3aYe #neurojobs #NeuroSkyence
t.ly
Research Assistant at UCL
Recruiting now: Research Assistant on jobs.ac.uk. Click for details and explore more academic job opportunities on the top job board
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Pascal Mamassian @mamassian.bsky.social · 24/09/2025
A nice shift in perceived colour between central and peripheral vision. The fixated disc looks purple while the others look blue. The effect presumably comes from the absence of S-cones in the fovea. From Hinnerk Schulz-Hildebrandt: arxiv.org/pdf/2509.115...
An array of 9 purple discs on a blue background. Figure from Hinnerk Schulz-Hildebrandt.
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Olivier Marre @oliviermarre.bsky.social · 16/08/2025
If you are looking for a book to read and are interested in computational/systems neuroscience or AI, I have a suggestion: trialsanderrors.substack.com/p/a-recommen...
trialsanderrors.substack.com
A recommended summer read: "The mechanization of the mind"
If you are working in systems or computational neuroscience, or AI, I would strongly recommend to read “The mechanization of the mind” by Jean-Pierre Dupuy.
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Valerie Ego-Stengel @vegostengel.bsky.social · 04/06/2025
A very clear, detailed, and fair account on the (obscure?) French way to distribute positions in academia, and then manage to actually do some research! Thanks Olivier
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Olivier Marre @oliviermarre.bsky.social · 03/06/2025
In case this is helpful for anyone, here is a post on how to get a job in french academia : trialsanderrors.substack.com/p/getting-a-... Aimed at non-french scientists who are curious, but french ones may find it useful too.
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Matteo Carandini @carandinilab.net · 07/02/2025
Neuropixels and Optogenetics are delighted to announce the birth of Neuropixels Opto Combining high-resolution electrophysiology and optogenetics Today in bioRxiv 960 sites, 28 emitters, 2 colors By Lakunina, @karolinazsocha.bsky.social, Ladd, et al www.biorxiv.org/content/10.1... (1/2)
A Neuropixels Opto probe with 3 blue emitters and 3 red emitters lighting up in succession, with corresponding neural activity in different layers of the cortex.
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Pascal Mamassian @mamassian.bsky.social · 08/02/2025
Some people see spontaneous faint flickering flashes in their visual field, a condition known as Visual Snow Syndrome (VSS, not to be confused with @vssmtg.bsky.social). Maybe a visual equivalent of the auditory tinnitus? Here is a very nice study from the lab of @sengelweb.bsky.social.
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Tom Baden @neurofishh.bsky.social · 05/02/2025
Seeking input: A standardized nomenclature for the rods and cones of the vertebrate retina A number of us have been working on a proposal to bring various disconnected naming systems for the vertebrate rods and cones across species into alignment. The basic proposal looks like this:
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Pascal Mamassian @mamassian.bsky.social · 31/01/2025
If you are interested in the contribution of Ibn al-Haytham to vision science, and if you don’t mind reading French, I recommend the book of Michel Imbert “La fin du regard éclairant” www.vrin.fr/livre/978271...
vrin.fr
La fin du regard éclairant - le Traité de l'Optique de Ibn al-Haytham : une révolution dans les sciences de la vision au XIe siècle | Collection Mathesis
Découvrez l'ouvrage La fin du regard éclairant | Collection Mathesis
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Dr Nick @nmwilkinson.eurosky.social · 22/01/2025
as a side effect of a sort of "false-fusion" cos the binoc pair acts like a spatial filter. A binoc extension of the previous filter model does the trick, reproduces the newborn results. The results don't imply an "innate neural face representation". The inference was flawed. doi.org/10.1111/desc...
doi.org
Staring us in the face? An embodied theory of innate face preference
Human expertise in face perception grows over development, but even within minutes of birth, infants exhibit an extraordinary sensitivity to face-like stimuli. The dominant theory accounts for innate....
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Olivier Marre @oliviermarre.bsky.social · 20/01/2025
New post: What chess (may have) taught me about neuroscience. trialsanderrors.substack.com/p/what-chess...
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Olivier Marre @oliviermarre.bsky.social · 20/01/2025
Good resolution of 2025: start a blog for thoughts that cannot go in papers (too speculative or preliminary).
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Ben Balas @bjbalas.bsky.social · 18/01/2025
Besides being beautiful, the different grouping principles on display across the different artists here is fascinating. It would be fun to see how consistent each person is in terms of how they approach lots of different patterns! #VisionScience
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Mel Goodale @action-brain.bsky.social · 16/01/2025
Clever study that explores the debate between those who claim that color categories are 'innate' and those who argue that they are dependent on language. It turns out that monkeys, unlike humans, do not have consensus color categories, suggesting cognitive mechanisms such as language are required.🧪🧠
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TübingenNeuroCampus @tueneurocampus.bsky.social · 15/01/2025
🧠 Wonderful speaker in the Neurocolloquium on Jan 23, at 4.15pm: Emilie Macé, Prof in the EXC Cluster Multiscale Bioimaging in Göttingen on how "Visual objects refine the encoding of head direction", live & in Zoom Host: Robert Ohlendorf @maxplanckcampus.bsky.social Sign up forms.gle/RoxUFPrj6Dyr...
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gregdfield.bsky.social @gregdfield.bsky.social · 15/01/2025
My first Bluesky post is to announce a Tenure-Track Faculty Search at the Jules Stein Eye Institute of UCLA. We are considering applications at the Assistant and Associate professor levels. Apply here: recruit.apo.ucla.edu/JPF10092. DM or email me with any questions. Please distribute!
recruit.apo.ucla.edu
Vision Science Faculty at UCLA Stein Eye Institute
University of California, Los Angeles is hiring. Apply now!
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Pascal Mamassian @mamassian.bsky.social · 14/01/2025
Do you want to study cognitive science and live in Paris? Our master’s program in Cognitive Science at @ENS_ULM, @psl_univ, and @EHESS_fr is now accepting applications for 2025-2026. All courses are in English. Deadline: 13 March 2025 More info: master-cognitive-science.ens.psl.eu/en
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Carsen Stringer @computingnature.bsky.social · 12/01/2025
What if… spontaneous neural activity 🧠 reflects the baseline rumblings of a brainwide dynamical system initialized for learning? We find that the rumblings have macroscopic properties like those emerging from linear symmetric, critical systems 🧵 #neuroscience #neuroAI www.biorxiv.org/content/10.1...
schematic of neural recordings from mouse V1, whole-brain, and hippocampus; neural activity traces from the population, showing more correlated activity in V1 and whole-brain recordings versus more decorrelated activity in hippocampus
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Olivier Marre @oliviermarre.bsky.social · 13/01/2025
Very likely that the record will be broken tonight ! 10 days earlier than the previous one, what an amazing feat !
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Olivier Marre @oliviermarre.bsky.social · 10/01/2025
How can the brain make predictions, and signal prediction errors ? Together with Simone Ebert, Thomas Buffet, Bruno Cessac et al, we studied this question in the retina in this paper: www.nature.com/articles/s41... A thread
nature.com
Temporal pattern recognition in retinal ganglion cells is mediated by dynamical inhibitory synapses - Nature Communications
The retina is known to strongly respond to omitted stimuli in periodic patterns. Here the authors propose that depressing inhibitory synapses shape the timing of such a response and are key to perform...
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Thomas Euler @teuler.bsky.social · 10/01/2025
Our paper on how the neuromodulator nitric oxide modulates a subset of mouse retinal ganglion cells is finally published in @elife.bsky.social doi.org/10.7554/eLif... Great work by @dgonschorek.bsky.social together with the lab of @oliviermarre.bsky.social and @matigoldin.bsky.social, ...
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bioRxiv Neuroscience @biorxiv-neursci.bsky.social · 09/01/2025
Spherical code of retinal orientation-selectivity enables decoding in ensembled and retinotopic operation www.biorxiv.org/content/10.1101/202…
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Anna Vlasits @annaintegrated.bsky.social · 10/12/2024
Thrilled to announce that my lab has been awarded the Research to Prevent Blindness Career Development Award! Now the lab has a *funded* opening for a post-doctoral fellow interested in studying neurodevelopmental disorders in the retina. More info here! www.vlasitslab.org/joinus
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Olivier Marre @oliviermarre.bsky.social · 06/01/2025
If you are not following the Vendee Globe ( www.vendeeglobe.org/en/tracker ) yet, it is about time. A thread about why:
vendeeglobe.org
Tracker | Vendée Globe 2024
All the information you need about the Vendée Globe 2024: skippers, rankings, maps and news about this solo, non-stop, non-assisted round-the-world race.
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declanrowley.bsky.social @declanrowley.bsky.social · 30/12/2024
This was a really fun collaboration and I hope everyone enjoys the paper! Please let us know if you have any feedback! media.giphy.com/media/pbG8W7...
giphy.com
- Find & Share on GIPHY
Discover & share this Animated GIF by decrow with everyone you know. GIPHY is how you search, share, discover, and create GIFs.
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Tomer Ullman @tomerullman.bsky.social · 19/12/2024
"The Illusion-Illusion: Vision Language Models See Illusions Where There are None" osf.io/preprints/ps... (this is a more systematic examination of the thing I was looking at a few days ago)
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Alexis Paez @palexis.bsky.social · 20/12/2024
We all learned the center-surround, rod and cone structure, but this is a lot of detail about glia and blood vessels in the retina and what happens in degeneration. doi.org/10.1016/j.cu... #MATLAB #Neuroscience #Neuroskyence
cell.com
Layer-specific anatomical and physiological features of the retina’s neurovascular unit
Grimes et al. use EM to examine the ultrastructure of neurovascular units in mouse retina and discover differences in glial coverage, neuronal contacts, and susceptibility to disease. Glial calcium signals are activated by ATP and propagate through all layers. Neurovascular contacts near photoreceptors are compromised in retinitis pigmentosa.
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Romain Brette @romainbrette.bsky.social · 21/12/2024
My Christmas gift to you fellow neurophysiologists: "Theory of axo-axonic inhibition". www.biorxiv.org/content/10.1...
biorxiv.org
Theory of axo-axonic inhibition
The axon initial segment of principal cells of the cortex and hippocampus is contacted by GABAergic interneurons called chandelier cells. The anatomy, as well as alterations in neurological diseases s...
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Markus Meister @mameister4.bsky.social · 14/12/2024
Horace Barlow, by all accounts, was thinking about 30 years ahead of his time. Here is a transcript of the opening keynote I gave at a symposium honoring Horace's scientific legacy: markusmeister.com/2024/12/14/h....
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George Mather @georgewm.bsky.social · 14/12/2024
Christmas motion illusion. The trees are completely stationary. I am currently studying the explanations for this kind of illusion.
Static Christmas trees that appear to move
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Markus Meister @mameister4.bsky.social · 17/12/2024
The unbearable slowness of being: Humans still clock in at just 10 bits/s. Even after peer review :) Share link: authors.elsevier.com/a/1kHVa3BtfH.... ArXiv: arxiv.org/abs/2408.10234
authors.elsevier.com
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Martin Hebart @martinhebart.bsky.social · 11/12/2024
This was 2020. Fast forward a few years and it became clear this was not working as intended: Many models, even very implausible ones, explained the data equally well. We also tried this with other variables, often with the same result. 9/n
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