Vivien
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vivienchopurian.bsky.social
Vivien
@vivienchopurian.bsky.social
Postdoc @UCSD Kiyonaga lab | working memory 🧠
Reposted by Vivien
Hola #SfN2025,
Clayspace Lab is excited to share 4 new posters from our lab on Working memory and neural dynamics! 🧠

Come stop by at our poster boards or find us around to discuss cool science. Details in the ad below 👇!
@sfn.org

#Neuroscience #SfN25
November 13, 2025 at 4:57 PM
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🚀 New preprint alert 🚀

How easily can working memory create interference in long-term memories? Our new preprint, Interference Across Memory Systems: Disrupting Long-Term Memories Through Working Memory examines this
osf.io/preprints/ps...

w/ @sahcan.bsky.social Anna Lena Mantei, Daniel Schneider
OSF
osf.io
November 16, 2025 at 7:22 PM
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The Kiyonaga Cognitive Neuroscience lab @ UCSD has four posters this year at #sfn2025 ! Come say hi!
November 14, 2025 at 11:33 PM
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Super excited to share a new preprint!

We asked a simple-but-big question:

What changes in the brain when someone becomes an expert?

Using chess ♟️ + fMRI 🧠 + representational geometry & dimensionality 📈, we ask:

1️⃣ WHAT information is encoded?
2️⃣ HOW is it structured?
3️⃣ WHERE is it expressed?

1/n
November 12, 2025 at 10:56 PM
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(1/4)
🧠 Did you know that kids remember time differently than adults? Our new preprint review w/ @drjeni-mdlab.bsky.social discusses the real implications for juvenile justice & why we need to ask about timing in ways that match kids' developing brains ⚖️

Paper: osf.io/preprints/ps...
November 12, 2025 at 5:26 PM
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The Computational and Cognitive Neural Sciences lab (ballardlab.org) at UC Riverside is recruiting psychology PhD students to join our team! Check out the flyer to learn about the lab and our stellar research community at UCR. Apply by 12/1!
drive.google.com/file/d/19m8i...
November 5, 2025 at 9:29 PM
Reposted by Vivien
🚨Preprint: Semantic Tuning of Single Neurons in the Human Medial Temporal Lobe

1/8: How do human neurons encode meaning?
In this work, led by Katharina Karkowski, we recorded hundreds of human MTL neurons to study semantic coding in the human brain:

doi.org/10.1101/2025...
Semantic Tuning of Single Neurons in the Human Medial Temporal Lobe
The Medial Temporal Lobe (MTL) is key to human cognition, supporting memory, emotional processing, navigation, and semantic coding. Rare direct human MTL recordings revealed concept cells, which were ...
doi.org
October 27, 2025 at 3:32 PM
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🚀 We’re hiring - Join our lab 🚀

🔍 Hiring: PhD (75% TV-L) & Postdoc (100% TV-L)
🧠 fMRI, VR, EEG, modelling

We combine a range of cognitive neuroscience methods to study flexible behaviour.

📅 Start: Feb 2026 or later | ⏳ Apply by Nov 3!

More details:
tinyurl.com/ms3a9ajt

#CognitiveNeuroscience
October 27, 2025 at 11:57 AM
Reposted by Vivien
Order-Selective Cells Tile Temporal Space and Predict Order Memory in Humans https://www.biorxiv.org/content/10.1101/2025.10.24.683575v1
October 25, 2025 at 4:16 AM
Reposted by Vivien
New preprint! What happens in the brain when people offload memories into external reminders? Using fMRI decoding, we found that the corresponding neural trace fades until it becomes statistically absent.

osf.io/preprints/ps...

🧵...
OSF
osf.io
October 24, 2025 at 3:18 PM
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Memory recall errors reflect interacting sensory and mnemonic representations https://www.biorxiv.org/content/10.1101/2025.10.20.683560v1
October 22, 2025 at 12:15 AM
Reposted by Vivien
✨My first first-author paper is out✨
Entorhinal grid-like codes for visual space during memory formation in @natcomms.nature.com ➡️ rdcu.be/eLRm2
Big thanks to everyone ‪@isabellacwagner.bsky.social‬, @tobiasstaudigl.bsky.social, @olejensen.bsky.social, @doellerlab.bsky.social, @clauslamm.bsky.social
Entorhinal grid-like codes for visual space during memory formation
Nature Communications - Eye movements during scene viewing are tied to grid-like codes in the entorhinal cortex. Grid signals are specific to later remembered scenes, covary with activity in...
rdcu.be
October 20, 2025 at 4:42 PM
Reposted by Vivien
Mnemonic maps of visual space in human prefrontal cortex https://www.biorxiv.org/content/10.1101/2025.10.17.683147v1
October 18, 2025 at 4:16 AM
Reposted by Vivien
Flexible Working Memory in the Peripheral Nervous System https://www.biorxiv.org/content/10.1101/2025.09.26.678884v1
September 28, 2025 at 10:15 PM
Reposted by Vivien
Spatial attention and working memory are popularly thought to be tightly coupled. Yet, distinct neural activity tracks attentional breadth and WM load.

In a new paper @jocn.bsky.social, we show that pupil size independently tracks breadth and load.

doi.org/10.1162/JOCN...
October 14, 2025 at 2:04 PM
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🧠🚨 How does the hippocampus transform the visual similarity space to resolve memory interference?

In this new preprint, we found that the hippocampus sequentially inverts the behaviorally relevant dimensions of similarity 🧵

www.biorxiv.org/content/10.1...
Hippocampal transformations occur along dimensions of memory interference
The role of the hippocampus in resolving memory interference has been greatly elucidated by considering the relationship between the similarity of visual stimuli (input) and corresponding similarity o...
www.biorxiv.org
October 14, 2025 at 4:48 PM
Reposted by Vivien
Reposted by Vivien
We’re recruiting a postdoctoral fellow to join our team! 🎉

I’m happy to share that I’ve opened back up the search for this position (it was temporarily closed due to funding uncertainty).

See lab page and doc below for details!
The Visual Learning Lab at UC San Diego is looking for a postdoctoral research fellow to join our lab!

Read more about our lab at www.vislearnlab.org
Home | The Visual Learning Lab at UCSD
Lab webpage for the Visual Learning Lab at UCSD, lead by Dr. Bria Long, Ph.D. Launching in July 2024!
www.vislearnlab.org
October 7, 2025 at 2:39 AM
Reposted by Vivien
Looking for a PhD/postdoc in computational psychiatry? Look no further!
Ondrej is a great scientist and mentor and his lab is certain to be an exciting place to be ⚡️
🚨 I am over the moon 🌓 to announce that I am joining University College Dublin @ucddublin.bsky.social as an Assistant Professor this fall to start the Uncertain Mind (UMI) lab 💫

I am looking for PhD/Postdoc candidates to join (more below 👇 ). Please RT as the deadline is pretty soon 🙏
October 1, 2025 at 6:34 PM
Reposted by Vivien
We’re looking for a postdoc to join our Max Planck group in Germany some time in 2026. If you have computational and/or neuroimaging expertise, and are interested in questions intersecting perception and cognition, please reach out! I’ll also be happy to chat at the #Bernsteinconference this week.
September 29, 2025 at 5:15 PM
Reposted by Vivien
Incredible study by Raut et al.: by tracking a single measure (pupil size), you can model slow, large-scale dynamics in neuronal calcium, metabolism, and brain blood oxygen through a shared latent space! www.nature.com/articles/s41...
September 25, 2025 at 8:53 AM
Reposted by Vivien
Excited to release the SPOT grid: a new image set that factorially crosses scene-object & texture-pattern pairings.

We hope these stimuli will be useful to researchers aiming to (partially) disentangle the contributions of lower- and higher-level visual features to behavior & brain activity.

1/
September 22, 2025 at 7:34 PM
Reposted by Vivien
Neurons in mouse primary visual cortex that respond emergently to illusory contours drive pattern completion

www.nature.com/articles/s41...
Recurrent pattern completion drives the neocortical representation of sensory inference - Nature Neuroscience
Neurons that respond emergently to illusory contours drive pattern completion in V1. Pattern completion in lower cortical areas may therefore mediate perceptual inference by selectively reinforcing ac...
www.nature.com
September 17, 2025 at 4:59 PM