Omri Raccah

Exercise enhances hippocampal-cortical ripple interactions in the human brain Physical exercise doesn't just benefit the heart and muscles—it also supports brain health. This study reveals how a single exercise session can influence

Exercise enhances hippocampal-cortical ripple interactions in the human brain

neat analysis from iEEG data in patients:

academic.oup.com/braincomms/a...

Neural geometry in the human hippocampus enables generalization across spatial position and gaze Hippocampal neurons track positions of self, others, and gaze direction. However, it is unclear how their respective neural codes differ enough to avoid confusion while allowing for abstraction. We re...

Compositional representation of self, others, and gaze direction in *human* hippocampus - super cool.

arxiv.org/abs/2603.04747

Einstein’s locker at ETH Zurich

overall, these findings advance understanding of auditory and multisensory coding in the hippocampus, and reveal a dissociation along its longitudinal axis, from facilitation in posterior to generalization in anterior.

this and more in the paper! BIG thanks to those helped with data collection.

what about the rest of the brain?

whole-brain searchlight analysis revealed parallel effects in canonical multisensory cortical regions — situating the hippocampus within a broader multisensory network 🧠

how does the hippocampus generalize across sensory modalities? 💭

we found that the anterior hipp showed crossmodal decoding between auditory and visual versions of the same clip, suggesting a more abstract representation.

when we looked at multivariate patterns, a different picture emerged. RSA analysis revealed representations of both auditory and visual scenes.

furthermore, the posterior hipp showed enhanced similarity for congruent relative to unisensory stimuli, demonstrating multisensory facilitation 🔊👁️

first, we ran a GLM to examine univariate activity.

the hippocampus showed only visual responses across subfields, with no activation for auditory stimuli and no benefit of congruent audiovisual stimuli. but the story wasn't over 👀

using high res fMRI, we investigated this for auditory and visual modalities. participants viewed repeated movie clips in four formats: audio only, video only, and congruent or incongruent audiovisual 📽️🔉

we examined processing along the hippocampal long axis and across its subfields.

the human hippocampus receives convergent input from multiple sensory systems, yet we lack a basic understanding of how this structure integrates across senses.

we tackle this problem in our new preprint!

paper: doi.org/10.64898/202...

w/ Aryan Agarwal, @yannanzhu.bsky.social, & Nick Turk-Browne

how does the hippocampus generalize across sensory modalities? 💭

we found that the anterior hipp showed crossmodal decoding between auditory and visual versions of the same clip, suggesting a more abstract representation.

when we looked at multivariate patterns, a different picture emerged. RSA analysis revealed representations of both auditory and visual scenes.

furthermore, the posterior hipp showed enhanced similarity for congruent relative to unisensory stimuli, demonstrating multisensory facilitation 🔊👁️

first, we ran a GLM to examine univariate activity.

the hippocampus showed only visual responses across subfields, with no activation for auditory stimuli and no benefit of congruent audiovisual stimuli. but the story wasn't over 👀

using high res fMRI, we investigated this for auditory and visual modalities. participants viewed repeated naturalistic movie clips in four formats: audio only, video only, and congruent or incongruent audiovisual 📽️🔉

we examined processing along the hippocampal long axis and across its subfields.

The neural basis of imagination: An evolutionary perspective The study of imagination has progressed due to its operationalization through a variety of behavioural tasks, initially designed for human participant…

Hot take: the hippocampus isn't actually "evolutionarily ancient" and its not helpful to think of it as such.

The full argument for this take is right here (but you need to scroll down to sections 5-6):
www.sciencedirect.com/science/arti...

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.

Episodic memory encoding fluctuates at a theta rhythm of 3–10 Hz

1/6 Happy to share our new paper with @grassocamille.bsky.social and @virginievanw.bsky.social: "Nested contextual change and the temporal compression of episodic memory". www.biorxiv.org/content/10.6...

📍2003 marked the year in which the retro-cue paradigm was born. Fast forward, 23 years later, we adapt this logic to long-term memory and ask how does attention shape retrieval from long-term memory? 🤔

w/ @william-nm.bsky.social Kia Nobre, Nahid Zokaei and Nora Roüast
osf.io/preprints/ps... 1/n

A new preprint, co-authored with @johnwkrakauer.bsky.social:

The Deliberation Taboo

Cognitive science is, nominally, the science of thinking. We argue that the field has no theory of what thinking is and, even worse, that the topic has largely dropped out of focus. 1/

osf.io/preprints/ps...

Rutgers-Princeton Center for Computational Cognitive Neuropsychiatry Visit the post for more.

The Rutgers-Princeton Center for Computational Cognitive NeuroPsychiatry (ccnp.princeton.edu) is looking for a new clinical research coordinator! This is a long-term (at least 2 years, more is preferred) position for someone with a BA or MA who is interested in... /1

Congrats David!!

🚀 Postdoc Opening – AI Voice Agents for Alzheimer’s Care:

www.linkedin.com/posts/pedro-...

CLINICAL RESEARCH COORDINATOR | Nanthia Suthana We’re hiring! The Suthana Lab at Duke University is looking for a Research Assistant / Clinical Research Coordinator to join our team studying human memory, emotion, and real-world brain dynamics usin...

Great position for an RA and Durham a fun city!
www.linkedin.com/posts/nanthi...

Are you a junior faculty member interested in spending 2-4 weeks at Princeton Psych? Consider applying for our Microsabbatical program! It’s a fully funded visit for professional development and creating long-term collaborations.
psych.princeton.edu/diversity/mi...

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...

🎉 PINE Lab is hiring a postbacc Research Coordinator! Projects include cohort studies examining brain mechanisms linking adversity to cognition/language & RCTs of early interventions on neurodevelopment.
apply: forms.gle/Dyay39x2XEMn...
more info: www.plasticityinneurodevelopmentlab.com/join-us

I am looking to hire 2-3 post-docs over the course of the next few months to work on questions related to cognitive control in humans, broadly construed. EEG, TMS, DBS, sEEG, fMRI or related methodological experience preferred.
Apply here:

jobs.uiowa.edu/jobSearch/po...

Lab website: wessellab.org

The Aging & Development training program at WashU has an opening for a postdoc!

psychaging.wustl.edu

Very proud that this is finally out!

Come for the new auditory illusion, stay for the brain imaging and speech analysis…..

another great paper from @mh-christiansen.bsky.social, showing that non-constituents* can be primed

It's more evidence that traditional linguists were mistaken to believe memory was in short supply:
Human memory is compressed, clustered, implicit and vast