New preprint! Posterior cingulate is often linked to memory in humans but decisions in monkeys yet there's little consensus about its functional neuroanatomy. We recorded LFPs+single units in humans during matched value and memory based decisions, finding convergence in dorsal, but not ventral, PCC.

📣New paper! How does the sleeping brain help us to integrate new experiences while managing memories from the past? For his PhD work, @sabbaspoor.bsky.social recorded hippocampal ensembles in freely moving monkeys and found something unexpected. 🧵1/n www.nature.com/articles/s41... 🧪🧠📈👩‍🔬#OpenAccess

Experience reorganizes content-specific memory traces in macaques - Nature Neuroscience

In macaques, old memories, relative to new ones, are supported by more stable and interconnected cell assemblies. New-biased and old-biased assemblies reactivate during overnight sleep and can sometim...

nature.com

Out today! Our (w/ @annaschapiro.bsky.social) review of the alignment between the C-HORSE model and the hippocampal structure learning literature. We find strong congruence with the model's key principles and propose several avenues for future investigation!

Evidence for complementary learning systems within the hippocampus

Abstract. Decades of research have established the hippocampus as central to episodic memory, but growing evidence suggests that it also contributes to str

royalsocietypublishing.org

Exciting new preprint from the lab, led by @lizsiefert.bsky.social , together with @annaschapiro.bsky.social. Findings help to clarify when hippocampal ripples occur across wake and sleep, better aligning human data with animal models.

Liz Siefert@lizsiefert.bsky.social · 3mo ago

New preprint! We show low arousal states promote hippocampal ripple genesis in sleep and wake. This bridges rodent work, where ripples predominate during sleep, with human studies reporting ripples during active behavior, identifying low arousal as a common mechanism www.biorxiv.org/content/10.6...

"Ripple occurrence consistently tracked low arousal: rates were maximal in NREM sleep, small-pupil wake states, and slow heart rate periods across sleep and wake... ripple-like activity outside the hippocampus showed an opposite modulation, increasing with high arousal."

Arousal state modulates human hippocampal ripples

Hippocampal ripples are transient, high-frequency oscillations linked to memory replay and consolidation. Ripples are well-characterized in rodents to occur during periods of behavioral inactivity (i....

biorxiv.org

A *super* exciting new paper from @lizsiefert.bsky.social!! Human hippocampal ripple rates track very closely with several indicators of low arousal, during both sleep and wake. This is probably the most compelling data I have ever been associated with.

Liz Siefert@lizsiefert.bsky.social · 3mo ago

New preprint! We show low arousal states promote hippocampal ripple genesis in sleep and wake. This bridges rodent work, where ripples predominate during sleep, with human studies reporting ripples during active behavior, identifying low arousal as a common mechanism www.biorxiv.org/content/10.6...

New preprint! We show low arousal states promote hippocampal ripple genesis in sleep and wake. This bridges rodent work, where ripples predominate during sleep, with human studies reporting ripples during active behavior, identifying low arousal as a common mechanism www.biorxiv.org/content/10.6...

Arousal state modulates human hippocampal ripples

Hippocampal ripples are transient, high-frequency oscillations linked to memory replay and consolidation. Ripples are well-characterized in rodents to occur during periods of behavioral inactivity (i....

biorxiv.org

Super excited to share this preprint! How do we disentangle underlying structure from the particular features of a learning episode to benefit future learning? We find that memory reactivation during sleep promotes this structure abstraction process. www.biorxiv.org/content/10.6...

We’ve got an exciting new thing to share! We have causal evidence (using TMR) that memory reactivation during sleep promotes abstract understanding of underlying structure, allowing transfer learning in a new domain with zero superficial feature overlap with the learned one.

Sarah Solomon@sarahsolomon.bsky.social · 6mo ago

Super excited to share this preprint! How do we disentangle underlying structure from the particular features of a learning episode to benefit future learning? We find that memory reactivation during sleep promotes this structure abstraction process. www.biorxiv.org/content/10.6...

Still pumped up from yesterday's international sleep replay workshop! Provocative talks, engaging discussion groups & enthusiastic engagement by all attendees from undergrads to full professors. Stay tuned for info on the next one. And now, on to @cnsmtg.bsky.social. Check out our lab's posters!

Really thrilled that this paper led by @neurozz.bsky.social is now published in its final version in @elife.bsky.social!! This is a memory-focused (as opposed to RL-focused) account of the detailed characteristics of forward and backward awake and sleep replay! elifesciences.org/articles/99931

A unifying account of replay as context-driven memory reactivation

A context-driven memory model simulates a wide range of characteristics of waking and sleeping hippocampal replay, providing a new account of how and why replay occurs.

elifesciences.org

🚨 New preprint! Why do some insights from spikes translate to field potentials while others don't? In this paper we compare visual memory representations in spikes and LFPs to propose a general framework that answers this question. www.biorxiv.org/content/10.6... 🧵 (1/10) 🧠🟦 🧠💻

Neural representations of visual memory in inferotemporal cortex reveal a generalizable framework for translating between spikes and field potentials

Translating neurophysiological findings requires understanding the relationship between common measures of brain activity in animals (spiking activity) and humans (local field potentials, LFP). Prior ...

biorxiv.org

Kudos to the Brown University students who are posting continuous live updates, spaced just minutes apart, on the campus shooting. A lot of grace and professionalism under immense pressure. www.browndailyherald.com/article/2025...

Live updates: Two deceased in active shooter incident at Brown University

Serving the Brown University community since 1891

browndailyherald.com

starting fall 2026 i'll be an assistant professor at @upenn.edu 🥳 my lab will develop scalable models/theories of human behavior, focused on memory and perception currently recruiting PhD students in psychology, neuroscience, & computer science! reach out if you're interested 😊

At SfN and interested in 'neuronal dynamics underlying memory'?? Come check out the nanosymposium (NANO011) that @catrinahacker.bsky.social and I are chairing tomorrow (Sunday) from 8-11:30am. So many awesome folks sharing their research, spanning work in rodents, NHPs, and humans!!

Last month, I launched my lab at Ohio State. Our lab website is now live, and we're recruiting graduate students this cycle! If you're interested in the cognitive (neuro)science of learning & memory, please reach out! www.momentslab.org

Moments Lab

momentslab.org

For >5 years, the International Sleep Replay Workshops (ISRW) have brought together scientists studying sleep & memory. The next ISRW will be on March 6th in Vancouver (before @cogneuronews.bsky.social). Follow the link for details and to join the mailing list. isrw.bio.uci.edu Pls repost! #sleep

I'm recruiting a lab manager for my soon-to-be-launched lab at Ohio State! If you know of any recent grads who may be interested both in helping to build the lab and in developing skills in the cognitive neuroscience of memory, please share! osu.wd1.myworkdayjobs.com/en-US/OSUCar...

Research Associate

Screen reader users may encounter difficulty with this site. For assistance with applying, please contact hr-accessibleapplication@osu.edu. If you have questions while submitting an application, pleas...

osu.wd1.myworkdayjobs.com

Excited to share a new preprint w/ @annaschapiro.bsky.social! Why are there gradients of plasticity and sparsity along the neocortex–hippocampus hierarchy? We show that brain-like organization of these properties emerges in ANNs that meta-learn layer-wise plasticity and sparsity. bit.ly/4kB1yg5

A gradient of complementary learning systems emerges through meta-learning

Long-term learning and memory in the primate brain rely on a series of hierarchically organized subsystems extending from early sensory neocortical areas to the hippocampus. The components differ in t...

bit.ly

Incredibly excited and grateful to share that I’ll be starting a lab at The Ohio State University this(!) fall! My lab will study human learning and memory, with related interests in sleep, stress, and time perception. More info soon, but do get in touch if you’re interested in joining!

preprint alert 🚨 1/ Can we accurately detect sequential replay in humans using Temporally Delayed Linear Modelling (#TDLM)? In our recent study, we could not find any replay and decided to dig deeper by running a hybrid simulation with surprising results. Link to preprint & details below 👇

Amazing & comprehensive work by @brynnsherman.bsky.social demonstrating how sleep reactivation supports the integration of new info into existing knowledge. So excited to see this out!!

Brynn Sherman@brynnsherman.bsky.social · last yr.

New preprint! How do we integrate new information into prior knowledge? We find that existing knowledge enables rapid new learning but that interleaved replay during sleep promotes integration of new and old information. Modeling suggests a sleep context suppression mechanism. osf.io/preprints/ps...

New preprint! Statistical structure skews object memory toward predictable successors. Model simulations show how this bias can arise from the backward expansion of hippocampal representations. w/co-first @codydong.bsky.social , @marlietandoc.bsky.social & @annaschapiro.bsky.social osf.io/yuxb6_v1

📣 It's official: I'm super excited to share that I'll be joining Rice University as an Assistant Professor in the Department of Psychological Sciences! Lab will launch in Summer 2026— I'll be recruiting over the next year, so please spread the word! Short thread ⤵️

What motivates people to take action and share info about climate change? We tested 17 psychological interventions in a tournament—Discover the winners in our new paper! Out now in @pnas.org w/ @falklab.bsky.social, @michaelemann.bsky.social, & team. Thread ⤵️ 1/9 www.pnas.org/doi/10.1073/...

Behavioral interventions motivate action to address climate change | PNAS

Mitigating climate change requires urgent action at individual, collective, and institutional levels. However, individuals may fail to act because ...

pnas.org

Presenting DR. Tandoc!!! @marlietandoc.bsky.social It has been such a joy to get to work with this brilliant, creative, and fun person. Marlie was key to building both our lab's research program and its community from the very beginning, and we are going to miss her immensely. 💜 🥲

I had so much fun writing this summary of awesome work done by @lizsiefert.bsky.social @annaschapiro.bsky.social and co.! Learn about how your brain transforms memory during sleep (and at least one reason getting sleep is so important!): www.upennglia.com/briefs/bib-m... #neuroskyence #SciComm 🧪

How does the brain transform our memories during sleep? — GLIA

Or technically, Memory reactivation during sleep does not act holistically on object memory [See original abstract on Pubmed]

upennglia.com

Brains in Briefs @brainsinbriefs.bsky.social · last yr.

And next, NGG student Liz Siefert @lizsiefert.bsky.social tested whether reactivating certain memories during sleep in humans can help with their recall later. Current NGG student Catrina Hacker @catrinahacker.bsky.social breaks it down. www.upennglia.com/briefs/bib-m...

And next, NGG student Liz Siefert @lizsiefert.bsky.social tested whether reactivating certain memories during sleep in humans can help with their recall later. Current NGG student Catrina Hacker @catrinahacker.bsky.social breaks it down. www.upennglia.com/briefs/bib-m...

How does the brain transform our memories during sleep? — GLIA

Or technically, Memory reactivation during sleep does not act holistically on object memory [See original abstract on Pubmed]

upennglia.com

📣 Across the U.S., cuts to federal funding for health research are projected to cause losses of $16B and 68,500 jobs. How will YOUR area be impacted? Excited to share SCIMaP, a website that our team has created to communicate the impact of funding cuts. #PsychSciSky #MedicalSky scienceimpacts.org

Hey Philadelphia see you TOMORROW 11AM CITY HALL!!!! (And if you're a Penn person, @pennmindcore.bsky.social is hosting poster-making and donut-eating beforehand!!)

Amanda@dramandar.bsky.social · 2y ago

🚨 Science is under threat, and we must take a stand! 🚨 I’ve been hard at work organizing the Philadelphia rally for the Stand Up for Science National Day of Action @standupforscience.bsky.social—because this fight is personal.