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James Kragel

@jkragel.bsky.social

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

4 Posts172 Follower198 Folgt
Tobias Staudigl@tobiasstaudigl.bsky.social · 2w ago

📢 new preprint from the lab on action-guided memory reactivation lead by the fabulous @julia-sc.bsky.social see thread 👇

Julia Schaefer@julia-sc.bsky.social · 2w ago

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 👇🧵

Nicole Long@dorsolateralpfc.bsky.social · last mo.

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...

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

jobs.virginia.edu

Moufan Li@moufanli.bsky.social · last mo.

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...

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...

nature.com

Felipe De Brigard@felipedebrigard.bsky.social · 3mo ago

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.

Graham Flick@grahamflick.bsky.social · 4mo ago

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

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...

doi.org

Akram Bakkour@akrambakkour.bsky.social · 4mo ago

🚨🚨 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!

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...

uchicago.wd5.myworkdayjobs.com

James Kragel@jkragel.bsky.social · 5mo ago

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.

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...

doi.org

Earl K. Miller@earlkmiller.bsky.social · 5mo ago

Consciousness is rhythmic. Alpha oscillations track the projection of reactivated memories into conscious awareness doi.org/10.1523/JNEU... #neuroscience

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...

doi.org

Rodrigo Braga@rodbraga.bsky.social · 5mo ago

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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Rodrigo Braga@rodbraga.bsky.social · 2y ago

🚨 🧠 We have a new preprint out where we studied which brain networks are engaged during mental imagery and self-generated thought. We used a precision fMRI approach along with multidimensional experience sampling (mDES) to get trialwise self-reports from each participant about what they imagined.

Nanthia Suthana@suthanalab.bsky.social · 6mo ago

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! 👏

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...

journals.plos.org

PLOS Biology@plosbiology.org · 6mo ago

How do MTL theta oscillations relate to eye & body movements during navigation? @suthanalab.bsky.social &co show that #theta power increases during #saccades under memory demands, linking exploratory gaze & planning to memory‑related dynamics during #navigation @plosbiology.org 🧪 plos.io/4dwJhR8

Experimental design and task. Top left: Intracranial electroencephalographic activity, eye and body movements were recorded as participants freely walked around the room. Wall-mounted motion-tracking cameras recorded the position of on-body reflective markers. Participants also wore an eye-tracking headset to monitor saccadic eye movements. A snapshot from the eye-facing camera is shown in the bottom right. For illustrative purposes, an experimenter is shown wearing the full setup. Top right: MRI of an example participant with an implanted RNS System. Purple dots indicate the location of four electrode contacts in the left medial temporal lobe (MTL). The top left inset shows an X-ray used to localize electrode positions. Bottom left: The environment contained 20 visible wall-mounted signs and three invisible circular target locations (0.7 m diameter). At the start of the task, participants freely explored the room to locate the invisible targets; each time a target was reached, an auditory tone signaled success, allowing them to gradually learn and remember these locations through experience. The task then alternated between two conditions: “visually-cued” navigation, during which participants navigated to a wall-mounted sign (e.g., “Blue 3”), and “memory-cued” navigation, during which they recalled and navigated to the previously learned invisible targets (e.g., “T”).
Caswell Barry@caswell.bsky.social · 6mo ago

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. https://doi.org/10.64898/2026.03.04.709667

Earl K. Miller@earlkmiller.bsky.social · 6mo ago

Neural Tuning for Ordinal Processing: Convergent Patterns in Human Brains and Artificial Networks www.jneurosci.org/content/46/9... #neuroscience

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...

jneurosci.org

tbiba.bsky.social@tbiba.bsky.social · 6mo ago

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 🧠

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.

rdcu.be

Anup Das, PhD@neuroanup.bsky.social · 12mo ago

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...

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...

biorxiv.org

Asaf Gilboa@agilboa.bsky.social · 6mo ago

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...

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...

jneurosci.org

Alexander Huth@alexanderhuth.bsky.social · 8mo ago

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!

Eiko Fried@eikofried.bsky.social · 8mo ago

Would love to hear expert views on this paper. It appears to show that the operationalization of brain activity the field has relied on for 3 decades—the BOLD response—is not actually a sensible measure of brain activity. www.nature.com/articles/s41...