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James Kragel

@jkragel.bsky.social
172 followers 200 following 4 posts

Research assistant professor at UChicago studying the neural basis of episodic memory.

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Reposted by James Kragel
Melissa Franch, PhD @mfranch.bsky.social · 02/10/2026
Excited to see this work published! We find that the brain codes semantic relationships similar to contextual LLMs (like GPT2) but unlike LLMs, uses contrastive coding to prevent confusion of highly similar words. Many thanks to the reviewers and BCM neurosurgery team! www.nature.com/articles/s41...
nature.com
A population code for semantics in human hippocampus - Nature Neuroscience
Franch et al. show that human hippocampal neurons encode the meanings of the words we hear through distributed, context-sensitive population activity that mirrors some features of large language model...
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Ole Jensen @olejensen.bsky.social · 27/09/2026
I would like to highlight two postdoctoral positions in the project Neuronal Mechanisms of Reading in Children Using OPM-MEG at the University of Oxford: my.corehr.com/pls/uoxrecruit… my.corehr.com/pls/uoxrecruit��� Deadline 30 Sep.
my.corehr.com
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Andrej Bicanski @andrejbicanski.bsky.social · 22/09/2026
Now accepted and published --- with many thanks to the referees for helping sharpen the manuscript. Long time since the first notes. Good to see it officially out. www.cell.com/current-biol...
cell.com
A vector navigation and inference architecture can construct universal cognitive maps for abstract reasoning
Bicanski proposes an algorithm and neural mechanisms for the iterative construction of abstract cognitive maps via non-local inference. Map positions are triangulated and memorized by a set of extant ...
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Steve Ramirez @okaysteve.bsky.social · 16/09/2026
🚨 new work from the lab! "Hippocampal astrocytic sequences emerge during learning and memory recall" by @ryguy.io & @rsuthard.bsky.social thank you to the entire team for your camaraderie and for muscling through science together 🧠 -- we welcome all feedback! nature.com/articles/s41...
nature.com
Hippocampal astrocytic sequences emerge during learning and memory recall
Nature Neuroscience - Senne, Suthard and colleagues show that dorsal hippocampal astrocytes display time-compressed calcium-event sequences after foot shock and upon context re-exposure, and that...
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Ben Hayden @benhayden.bsky.social · 09/09/2026
New paper from the Neurosurgery Research Team at BCM! “Neural geometry in the human hippocampus enables generalization across spatial position and gaze” led by @assiachericoni.bsky.social! 🧵 www.cell.com/neuron/abstr...
cell.com
Neural geometry in the human hippocampus enables generalization across spatial position and gaze
Chericoni et al. show that neurons in the human hippocampus track the positions of multiple agents in a simple pursuit-based video game. They identified place codes for each agent and for gaze. The co...
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Desmond Oathes, PhD @desmondoathes.bsky.social · 23/07/2026
Looking for a data analyst with good MRI skills and coding background 💻🧠👩‍🔧. Sorry but visa sponsorship isn't an option. Kindly re-post! Apply here: wd1.myworkdaysite.com/recruiting/u...
wd1.myworkdaysite.com
Data Technician
University Overview The University of Pennsylvania, the largest private employer in Philadelphia, is a world-renowned leader in education, research, and innovation. This historic, Ivy League school co...
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Julia Schaefer @julia-sc.bsky.social · 17/08/2026
Episodic memory forms through action: gaze shifts sequentially sample experience as it unfolds 👀🏞️ 🧠 But actions may also help organize how the brain reactivates episodic memories! 👀🧠💭 🏞️ Check out our new preprint 👇 doi.org/10.64898/202... 🎉 @tobiasstaudigl.bsky.social & Aditya Chowdhury 👇🧵
doi.org
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Tobias Staudigl @tobiasstaudigl.bsky.social · 18/08/2026
📢 new preprint from the lab on action-guided memory reactivation lead by the fabulous @julia-sc.bsky.social see thread 👇
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Nicole Long @dorsolateralpfc.bsky.social · 23/07/2026
My lab is hiring! We are recruiting a full time research coordinator to support our projects on memory brain states. More info and application: jobs.virginia.edu/us/en/job/R0...
jobs.virginia.edu
Research Coordinator, Long Term Memory Lab - Psychology in Charlottesville, Virginia, United States of America | Other at University of Virginia
Apply for Research Coordinator, Long Term Memory Lab - Psychology job with University of Virginia in Charlottesville, Virginia, United States of America. Other at University of Virginia
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Moufan Li @moufanli.bsky.social · 20/07/2026
Our paper is out in @natmachintell.nature.com! We trained multiple RNNs to perform free recall. The best-performing ones learned a strategy akin to the memory palace technique. See thread below for more info. www.nature.com/articles/s42...
nature.com
A neural network model of free recall learns multiple memory strategies - Nature Machine Intelligence
Li et al. show that recurrent neural networks optimized for free recall discover diverse, human-like memory strategies beyond classical temporal context models, with top models using an index-based me...
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Andrej Bicanski @andrejbicanski.bsky.social · 14/07/2026
Postdoc position on Perirhinal Cortex function in Leipzig!
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Rodrigo Braga @rodbraga.bsky.social · 14/07/2026
Now published in Journal of Neurophysiology: journals.physiology.org/doi/abs/10.1...
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Neil Burgess @neilburgess10.bsky.social · 01/07/2026
Ever wondered how the hippocampal cognitive map is read-out? @changmin-yu.bsky.social @zilong-ji.bsky.social with Jake & John, show that, during navigation, theta sweeps indicate remembered goal-directions (cf. current/next movements or perceptual targets) 1/2 www.nature.com/articles/s41...
Decoded locations from place cell firing sweep towards a remembered goal location during each theta cycle irrespective of the current movement or head direction
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Ben Hayden @benhayden.bsky.social · 24/06/2026
New lab paper ! "Shared neural geometries for bilingual semantic representations in human hippocampal neurons" led by @xinyuanyan.bsky.social. 🧵 www.sciencedirect.com/science/arti...
sciencedirect.com
Shared neural geometries for bilingual semantic representations in human hippocampal neurons
The human brain has the remarkable ability to comprehend and express similar concepts in multiple languages. To understand how it does so, we examined…
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Felipe De Brigard @felipedebrigard.bsky.social · 04/06/2026
Many have heard the expression “All models are wrong but some models are useful”. I prefer its counter-positive: “All models are wrong and most models are useless”, which I think more closely captures a lot of science.
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Aidan Horner @aidanhorner.bsky.social · 11/05/2026
Very excited to have this officially published: A neural state space for episodic memories A brief thread... #neuroskyence #psychscisky #cognition 🧪 @cp-trendscognsci.bsky.social
sciencedirect.com
A neural state space for episodic memories
Episodic memories are highly dynamic and change in nonlinear ways over time. This dynamism is not captured by existing systems consolidation theories …
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Sebastian Michelmann @s-michelmann.bsky.social · 10/05/2026
So excited to see this out today! Huge congrats to @oliviachristiano.bsky.social, who led this project.
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James Hyman @jamesmhyman.bsky.social · 09/05/2026
Ripples in human hippocampus shape mPFC representations and guide towards correct solutions. rdcu.be/fhKlZ
rdcu.be
Human hippocampal ripples coordinate planning sequences and compositional representations in neocortex
Nature Neuroscience - Human hippocampal ripples and replay interact with the prefrontal cortex to update mental representations online, letting the brain compositionally combine familiar elements...
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Ben Hayden @benhayden.bsky.social · 06/05/2026
New paper from the lab! "Plasticity and language in the anaesthetized human hippocampus" www.nature.com/articles/s41...
nature.com
Plasticity and language in the anaesthetized human hippocampus - Nature
In the hippocampus, complex processing of sensory stimuli occurs even in the unconscious state.
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Graham Flick @grahamflick.bsky.social · 30/04/2026
Pleased to share that our MEG and eye-tracking study of visual memory formation, saccades, & alpha oscillations is now published (as a Featured Article!) in the Journal of Neuroscience! Full paper here: doi.org/10.1523/JNEU... w/ Jed Meltzer @drjenryan.bsky.social @rosannaolsen.bsky.social
doi.org
Phase-Locking Saccades to Posterior Alpha Oscillations Improves the Neural Representation of Visual Objects during Memory Formation
Visual memory formation relies on the intake and neural processing of discrete samples provided by gaze fixations and saccades. Past research has highlighted a functional relationship between the timi...
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Akram Bakkour @akrambakkour.bsky.social · 23/04/2026
🚨🚨 Job Alert! 🚨🚨 We are seeking a full-time Study Coordinator for a NIMH-funded project that aims to uncover cognitive and neural mechanisms underlying maladaptive food-choice behavior in anorexia nervosa using behavior, eye tracking, fMRI, and computational models. Pls spread the word!
uchicago.wd5.myworkdayjobs.com
Study Coordinator
Department SSD Institute for Mind and Biology: Staff and Temporary Employees About the Department The Eating Disorders Program in the Department of Psychiatry and Behavioral Neuroscience at the Univer...
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James Kragel @jkragel.bsky.social · 10/04/2026
New paper from our group out in @pnas.org! doi.org/10.1073/pnas.... Big thank you to coauthors @vosstacular.bsky.social and @anikka-jordan.bsky.social. Anikka spearheaded this project during her time as an RA and is now a grad student at Yale.
doi.org
Spatial and semantic memory reorganize a hippocampal long-axis gradient | PNAS
The hippocampus supports episodic memory by binding spatial and semantic information, yet how this information is simultaneously organized along it...
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Earl K. Miller @earlkmiller.bsky.social · 06/04/2026
Consciousness is rhythmic. Alpha oscillations track the projection of reactivated memories into conscious awareness doi.org/10.1523/JNEU... #neuroscience
doi.org
Alpha oscillations track the projection of reactivated memories into conscious awareness
By definition, episodic memory is a conscious phenomenon. Memory traces reactivated by the hippocampus and reinstated in the sensory cortices need to enter conscious awareness for them to be re-experi...
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Rodrigo Braga @rodbraga.bsky.social · 31/03/2026
Our new paper on brain networks engaged during imagining is out now in Neuron! Here is a download link (free for 50 days): authors.elsevier.com/c/1msNE3BtfH... Congratulations to Nate Anderson for leading this work @rementurus.bsky.social 🧵
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Nanthia Suthana @suthanalab.bsky.social · 17/03/2026
New lab paper! 🧠 Human hippocampal & MTL theta activity is linked to eye movements, but only during memory-guided navigation. Theta is also strongest during longer, more exploratory eye movements. plos.io/4dwJhR8 Huge congrats to Humza & team! 👏
journals.plos.org
Eye movements reflect memory-related theta activity in the human brain
Theta oscillations in the medial temporal lobe support memory, but how they relate to eye and body movements during human navigation is unclear. This study shows that theta power increases during sacc...
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Dr Jen Ryan @drjenryan.bsky.social · 16/03/2026
Hi Colleagues who use eyetracking! 👋 👀 @shen4brains.bsky.social , @jordwynn.bsky.social, Zhong Xu Liu and I are guest editing a Special Issue for Neuropsychologia on Contributions of eyetracking to cognitive neuroscience.
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Caswell Barry @caswell.bsky.social · 10/03/2026
Long wondered how grid cell activity translates to the hexadirectional fMRI signal. Almog et al. have a neat answer — it's firing *variance* rather than mean rate. Makes sense when you think about it. Worth reading if you work on grid cells or fMRI. doi.org/10.64898/2026.03.04.709667
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Earl K. Miller @earlkmiller.bsky.social · 10/03/2026
Neural Tuning for Ordinal Processing: Convergent Patterns in Human Brains and Artificial Networks www.jneurosci.org/content/46/9... #neuroscience
jneurosci.org
Neural Tuning for Ordinal Processing: Convergent Patterns in Human Brains and Artificial Networks
Processing ordinality, i.e., the rank of an item in a series such as 1st, 2nd, 3rd, etc., is a fundamental skill shared by humans and animals. While humans often use symbolic sequences like numbers or...
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Andrej Bicanski @andrejbicanski.bsky.social · 09/03/2026
1/N: Dear cognitive map fans, I’d like to share a model I’ve been working on for a while (clearing backlog :). I show how a vector navigation architecture (VNA) and a “positional inference network” (PIN) can build Universal Cognitive Maps (UCMs) for abstract spaces. www.biorxiv.org/content/10.6...
biorxiv.org
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Nature Human Behaviour @nathumbehav.nature.com · 02/03/2026
Episodic memory encoding fluctuates at a theta rhythm of 3–10 Hz
dlvr.it
Episodic memory encoding fluctuates at a theta rhythm of 3–10 Hz
Nature Human Behaviour, Published online: 02 March 2026; doi:10.1038/s41562-026-02416-5Biba et al. show that episodic memory encoding fluctuates at a theta rhythm of 3–10 Hz.
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tbiba.bsky.social @tbiba.bsky.social · 02/03/2026
I am excited to share my first paper, showing that episodic memory formation is theta rhythmic, is now published in Nature Human Behavior! Check it out here: rdcu.be/e6pzS. Thanks to my PI, Katherine Duncan, and to my collaborators for their support on this journey! Stay tuned for iEEG follow up 🧠
rdcu.be
Episodic memory encoding fluctuates at a theta rhythm of 3–10 Hz
Nature Human Behaviour - Biba et al. show that episodic memory encoding fluctuates at a theta rhythm of 3–10 Hz.
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Anup Das, PhD @neuroanup.bsky.social · 18/09/2025
1/7 New preprint on the role of insular traveling waves in memory and behavior, using depth recordings from neurosurgical patients, with @chenwumd.bsky.social, Sameer Sheth, and Josh Jacobs. www.biorxiv.org/content/10.1...
biorxiv.org
Insular Traveling Waves Link Distributed Neural Dynamics to Human Memory Performance
The insula is a critical brain region that plays a foundational role in adaptive human behaviors, with diverse subregions performing distinct functional roles. However, explaining how these insular su...
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Asaf Gilboa @agilboa.bsky.social · 24/02/2026
New paper from our team led by the incredibly talented Dr. Erik Wing (with Jordan Chad, Geneva Mariotti and @drjenryan.bsky.social). www.jneurosci.org/content/earl...
jneurosci.org
The tuned cortex: Convergent expertise-related structural and functional remodeling across the adult lifespan
Neuroplasticity is a defining property of the brain. Structural and functional brain changes arise soon after learning and are particularly evident following years of practice that underpin expert per...
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Alexander Huth @alexanderhuth.bsky.social · 05/01/2026
This paper had a pretty shocking headline result (40% of voxels!), so I dug into it, and I think it is wrong. Essentially: they compare two noisy measures and find that about 40% of voxels have different sign between the two. I think this is just noise!
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Arne Ekstrom @adekstreme.bsky.social · 04/12/2025
We are hiring an assistant professor in cognitive neural systems in the department of psychology at the university of arizona. please use this link to check out the requirements and apply! arizona.csod.com/ux/ats/caree...
arizona.csod.com
Assistant Professor, Psychology (T/TE)
Duties & Responsibilities:Publishing peer-reviewed scholarly works.Maintaining an active research program.Obtaining extramural funding.Teaching un...
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Martin Hebart @martinhebart.bsky.social · 04/11/2025
Please repost! I am looking for a PhD candidate in the area of Computational Cognitive Neuroscience to start in early 2026. The position is funded as part of the Excellence Cluster "The Adaptive Mind" at @jlugiessen.bsky.social. Please apply here until Nov 25: www.uni-giessen.de/de/ueber-uns...
View from your office onto Giessen and surrounding villages.
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Nina Rouhani @ninarouhani.bsky.social · 24/10/2025
I will be recruiting 🌟PhD students🌟 for my newish lab! If you're interested in learning & memory mechanisms applied to individual, interactive & collective behavior using computational modeling, real-world experiments and fMRI, email me! RTs much appreciated 🙏 rouhanilab.com
rouhanilab.com
Interactive Cognition Lab | USC
Interactive Cognition Lab at USC, led by principal investigator, Dr. Nina Rouhani.
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Nora Newcombe @noranewcombe.bsky.social · 07/10/2025
Thrilled to see this paper out! It's the culmination of a project begun in the depths of the pandemic with Sabrina Karjack and @zoengo.bsky.social . We continue our exploration of how children generalize when their episodic memory is not yet mature. www.nature.com/articles/s41...
nature.com
The dependence of children’s generalization on episodic memory varies with age and level of abstraction - Nature Communications
Children’s ability to generalize from episodic memories varies by both age and the level of abstraction. Here, the authors show that lower level generalization increasingly depends on episodic memory with age, whereas higher level generalization shows no such relationship.
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Abhilasha Joshi, PhD @rhythmicspikes.bsky.social · 17/09/2025
1/ 🚨 New preprint! 🚨 Excited and proud (& a little nervous 😅) to share our latest work on the importance of #theta-timescale spiking during #locomotion in #learning. If you care about how organisms learn, buckle up. 🧵👇 📄 www.biorxiv.org/content/10.1... 💻 code + data 🔗 below 🤩 #neuroskyence
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Nature Reviews Neuroscience @natrevneuro.nature.com · 18/09/2025
Ripple contributions to human memory: making the spiking content count — a Review by Joel Reithler, Kelsey K. Sundby & Kareem A. Zaghloul www.nature.com/articles/s41... #neuroscience #neuroskyence
nature.com
Ripple contributions to human memory: making the spiking content count - Nature Reviews Neuroscience
In animal models, transient high-frequency oscillations in synchronized neural activity, known as ripples, have been linked to memory. Reithler et al. assess the current evidence for a contribution of...
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Ole Jensen @olejensen.bsky.social · 18/09/2025
In our Trends in Cogn Sci paper we point to the connectivity crisis in task-based human EEG/MEG research: many connectivity metrics, too little replication. Time for community-wide benchmarking to build robust, generalisable measures across labs & tasks. www.sciencedirect.com/science/arti...
sciencedirect.com
Confronting the connectivity crisis in human M/EEG research
The cognitive neuroscience community using M/EEG has not converged on measures of task-related inter-regional brain connectivity that generalize acros…
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Andrej Bicanski @andrejbicanski.bsky.social · 09/09/2025
A while in the making, here's a short paper on how one might get from spatial to episodic memory with temporal indexing, sequence generation via grid cell analogs, + a bit of perspective/review on time, wider HPC function ... psycnet.apa.org/fulltext/202...
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Mariam Aly @mariamaly.bsky.social · 24/08/2025
Is the hippocampus best understood in term of discrete subfields or functional gradients? Functional gradients are recapitulated within each hippocampal subfield, supporting a role for both discrete & continuously changing computations. Neat work by Bouffard, @barense.bsky.social, & Moscovitch!
biorxiv.org
Discrete Subfields and Continuous Gradients Coexist: A Multi-Scale View of Hippocampal Organization
The human hippocampus is studied via two competing frameworks: one dividing it into discrete anatomical subfields with distinct computational processes, and another describing it as a continuous, func...
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Matthias Nau @matthiasnau.bsky.social · 25/08/2025
Excited to share our new paper w/ @cibaker.bsky.social in @natcomms.nature.com linking active vision & memory! We provide evidence that gaze reinstatement & neural reactivation are deeply related phenomena that jointly reflect the experiences constructed during recall. doi.org/10.1038/s414... 🧵1/9
doi.org
Neural and behavioral reinstatement jointly reflect retrieval of narrative events - Nature Communications
When people recall a movie, their eye movements and brain activity resemble those observed during the viewing. These behavioral and neural reactivations are linked through a common process, likely ref...
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Mariam Aly @mariamaly.bsky.social · 22/08/2025
I can't quite believe it – I got a new NSF grant! 😲🤯 I'm incredibly grateful to the program officers & reviewers for their dedication and efforts to keep science going 🌟👏🏼 So, I'll be hiring! Looking for a postdoc to study competition in memory-guided attention. See flyer for details! 🎉
[Aly Lab Logo: schematic of brain in shades of blue with two cut-out seahorses facing each other]. Postdoctoral Position in the Aly Lab at UC Berkeley. We are recruiting a postdoctoral scholar to work on NSF-funded research examining competition and cooperation in memory-guided attention. The position will be supervised by Dr. Mariam Aly (https://www.alylab.org/) in the Department of Psychology at UC Berkeley. Candidates should have a PhD in Psychology, Neuroscience, Cognitive Science, or a related field, and expertise in studies of behavior as well as neuroimaging and/or eye tracking. This is a two-year position with a flexible start date. More details here: https://tinyurl.com/alylabpostdoc
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Nico Schuck @nicoschuck.bsky.social · 22/08/2025
Delighted to share our work on replay and successor representations! We find replay during very short task pauses in human visual cortex that is linked to learning SRs & happens when learning is implicit. Study led by @lnnrtwttkhn.bsky.social #compneuro #neuroskyence www.pnas.org/doi/10.1073/...
pnas.org
Replay in the human visual cortex during brief task pauses is linked to implicit learning of successor representations | PNAS
Humans can implicitly learn about multistep sequential relationships between events in the environment from their statistical co-occurrence. Theore...
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Simon W Davis @woodforbrains.bsky.social · 19/08/2025
Cortico-hippocampal interactions underlie schema-supported memory encoding in older adults New paper led by @shenyanghuang.bsky.social! academic.oup.com/cercor/artic... Older adults' memory benefits from richer semantic contexts. We found connectivity patterns supporting this semantic scaffolding.
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Jordana Wynn @jordwynn.bsky.social · 19/08/2025
Slowly making my way through that grad school data! Decoding memory function through naturalistic gaze patterns | PNAS share.google/vuOSbiRk9nBH...
share.google
Decoding memory function through naturalistic gaze patterns | PNAS
Eye movements are closely linked to encoding and retrieval processes, with changes in viewing behavior reflecting age- and pathology-related memory...
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Simon W Davis @woodforbrains.bsky.social · 15/08/2025
My new university's logo is a PSI! How frickin cool is that! Help me grow a new lab at in IU Bloomington! We're seeking brilliant young scientists interested in memory representations, neuromodulation & aging. Coordinator: bit.ly/3Hu3UzT Postdoc: bit.ly/4oBZF6j Accepting GS apps in the Fall!
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Rodrigo Braga @rodbraga.bsky.social · 05/08/2025
🚨 New Preprint 🚨 Targeting intracranial electrical stimulation (ES) to network regions defined within individuals causes network-level effects By Cyr et al. *** Q: Can we use individualized network maps from precision fMRI to modulate a targeted network via intracranial ES? A: Yes! 🧵:
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