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peterdoohan.bsky.social

@peterdoohan.bsky.social
137 followers 202 following 15 posts
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Adrian Roggenbach @a-roggenbach.bsky.social · 24/08/2026
⚠️PREPRINT ALERT⚠️ How can we better understand distributed brain activity across temporal and spatial scales? In this collaborative project, we combined ultra-flexible electrodes with two-photon imaging to illuminate brain-wide neural dynamics. Link: doi.org/10.21203/rs.... 1/8
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Andrew MacAskill @macaskillaf.bsky.social · 20/08/2026
Congrats @jespass.bsky.social on her new paper! PFC is widely thought to talk to HPC via nucleus reuniens - but no one has tested if this actual connectivity exists. Turns out it's wired to block it: PFC inputs to reuniens contact only neurons projecting back to PFC, not ones projecting to HPC. 🧪🧠📈
biorxiv.org
Nucleus reuniens is organised as parallel circuits rather than a prefrontal-hippocampal relay
Interactions between the prefrontal cortex (PFC) and hippocampus (HPC) are crucial for flexible and memory guided behaviour. Because there are no direct projections from PFC to HPC, it is widely presu...
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bioRxiv Neuroscience @biorxiv-neursci.bsky.social · 17/08/2026
Nucleus reuniens is organised as parallel circuits rather than a prefrontal-hippocampal relay www.biorxiv.org/content/10.64898/20…
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Abraham Zelalem Vollan @azvollan.bsky.social · 06/08/2026
Now in Science: How does the brain’s navigation system allocate its limited representational resources during behavior? We found that grid cells sweep toward locations of interest, providing a potential mechanism for allocating spatial attention in the cognitive map.🧵 science.org/doi/10.1126/...
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The Transmitter @thetransmitter.bsky.social · 06/08/2026
Kevin Mitchell @wiringthebrain.bsky.social talks to Timothy Behrens @behrenstimb.bsky.social about which neural systems the field has genuinely cracked. #neuroskyence www.thetransmitter.org/computationa...
thetransmitter.org
Success stories from computational neuroscience
Kevin Mitchell talks with Timothy Behrens about ring attractors, the role of innate structure, and an expanded view of cognitive maps.
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The Transmitter @thetransmitter.bsky.social · 06/08/2026
For 30 years, neuroscientists have argued about whether theta sweeps are just passive sensing, or something closer to planning. So which is it? #neuroskyence By @natmesanash.bsky.social www.thetransmitter.org/memory/new-f...
thetransmitter.org
New findings begin to resolve theta sweep debate
Theta sweeps have been mired in controversy for decades, but the emerging consensus view suggests that they function in attention and goal direction.
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Stanley Heinze @stanley-heinze.bsky.social · 30/07/2026
New preprint! www.biorxiv.org/content/10.6... Nearly a decade after starting the project, the first major results from our comparative connectomics work is online! Comparing the head direction circuits of the central complex in bees, ants and flies, recapitulating >300million years of evolution.
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Helen Barron @helencbarron.bsky.social · 28/07/2026
***New preprint from the lab*** showing “Generative replay across hippocampal-neocortical circuits”. In sleep we show spiking sequences in V1 (sensory neocortex!) that represent information that has not been directly experienced www.biorxiv.org/content/10.6... @bndu.ox.ac.uk @ndcnoxford.bsky.social
biorxiv.org
Generative replay across hippocampal-neocortical circuits
To make flexible decisions, the brain needs to make inferences between events that were not directly experienced together. In sharp-wave ripple (SWR) events, during periods of rest and sleep, spiking ...
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Tim Behrens @behrenstimb.bsky.social · 24/07/2026
This is a spectacular paper
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Open Neuroscience @open-neuroscience.com · 07/07/2026
📜 Project Showcase 🛠️ pyControl: Open source, Python-based, behavioural experiment control. 👩‍💻 🧑‍💻 Developed by Thomas Akam 👀 To learn more about it: open-neuroscience.com/en/post/pyco... #OpenSoftware #OpenScience #OpenSource
pyControl
Open source, Python-based,
behavioural experiment control.pyControl is a system of open source hardware
and software for controlling behavioural
experiments in neuroscience and psychology,
built around the MicroPython microcontroller.pyControl is a user-friendly and flexible tool
addressing a commonly encountered use case
in behavioural neuroscience:
(1) Defining behavioural tasks as extended state machines.
(2) Running them efficiently as high-throughput experiments.
(3) Communicating task logic to other researchers
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AntonioFR @antferrui.bsky.social · 06/07/2026
Our work on goal-directed theta sweeps is out! We found two different types of theta sweeps in the rat hippocampus. During random foraging, left-right alternating sweeps dominated (Vollan, 25). However, during memory-guided navigation sweeps pointing to hidden goal locations emerged with learning.
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peterdoohan.bsky.social @peterdoohan.bsky.social · 01/07/2026
Beautiful! Hippocampal theta sweeps are biased towards sampling more promising futures 🧹📍
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Alon Baram @alonbaram.bsky.social · 29/06/2026
How does the human brain extract abstract structure from experience? We show that sensory-independent relational representations emerge in mPFC over several days. Work with @mgarvert.bsky.social and @behrenstimb.bsky.social now out in @currentbiology.bsky.social: www.cell.com/current-biol...
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Mathias Sablé-Meyer @mathiassablemeyer.bsky.social · 16/06/2026
Good scientist, terrible designer? We feel you. Inspired by MetBrewer, the palette chooser for the connoisseurs, @sandra-neuro.bsky.social and I present EraBrewer: great looking colours for us Swifties! github.com/mathias-sm/E... cran.r-project.org/web/packages...
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peterdoohan.bsky.social @peterdoohan.bsky.social · 15/06/2026
This makes some fun experimental predictions ... 👀📈 @lpriestley.bsky.social
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Tim Behrens @behrenstimb.bsky.social · 11/06/2026
This is one of the coolest things I have been involved with. Truly flexible navigation in mice. Real insight into how mPFC computes the plans. Great fun to see what PFC is doing with those hippocampal theta sweeps. From the awesome @peterdoohan.bsky.social and (now on bsky) @thomasakam.bsky.social
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Mohamady El-Gaby @melgaby.bsky.social · 11/06/2026
This paper is so cool that it’s finally convinced @thomasakam.bsky.social to join Bluesky
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Thomas Akam @thomasakam.bsky.social · 11/06/2026
This project builds on work establishing the behaviour done at Champalimaud in Lisbon with @michaelfsp.bsky.social, Beatriz Godinho, Christian Machens, and @ruimcosta.bsky.social : www.biorxiv.org/content/10.6...
biorxiv.org
Flexible route planning and rapid structure learning by mice in complex environments
Action selection using predictive models of the environment plays a fundamental role in human and animal behaviour, yet is poorly understood at circuit and algorithmic levels. Spatial navigation is an...
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Kris Jensen @kristorpjensen.bsky.social · 11/06/2026
It has been super fun to work on this, where we learned that: 1) Mouse PFC is needed for model-based override of habits. 2) Separate PFC populations encode a 'policy' and the current 'value'. 3) The policy and value codes alternate theta sweeps towards the goal. ...and much much more!
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peterdoohan.bsky.social @peterdoohan.bsky.social · 11/06/2026
How do brains plan actions towards goals? To get at this question we studied mice navigating complex mazes as goals changed on every trial 🧵 Work with @thomasakam.bsky.social @behrenstimb.bsky.social @kristorpjensen.bsky.social now on BioRxiv: www.biorxiv.org/content/10.6...
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Helen Barron @helencbarron.bsky.social · 13/03/2026
Today! 13:15–16:15 poster session #cosyne26 @sumedhanalluru.bsky.social
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peterdoohan.bsky.social @peterdoohan.bsky.social · 12/03/2026
Come see what grid cells do on complex mazes tonight at #cosyne2026 :) @charlesdgburns.bsky.social
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Mathias Sablé-Meyer @mathiassablemeyer.bsky.social · 22/01/2026
Excited to see this Version Of Record of my work out in @elife.bsky.social! elifesciences.org/articles/106... We investigate the mental representation of geometric shapes in adults and children using fMRI and MEG. Each figure has a video of me explaining the figure: go and read it, or read below.
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Blake Russell @neurorussell.bsky.social · 26/01/2026
Out today in Neurophotonics, we show that cross-talk between the imaging laser and opsin in all-optical experiments can affect response dynamics beyond what has been accounted for. Imaging conditions subthreshold for evoking spikes can accelerate opsin desensitization: doi.org/10.1117/1.NP...
doi.org
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Portugues Lab @portugueslab.bsky.social · 02/01/2026
1/n: A new collaborative preprint from the lab to start the year: "A multi-ring shifter network computes head direction in zebrafish" together with Siyuan Mei, Martin Stemmler and Andreas Herz from the LMU, Munich.
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Sebastijan Veselic @sebves.bsky.social · 15/11/2025
1/ Excited to share that our symposium review covering cognitive mapping in the PFC just came out in the Journal of Neuroscience: www.jneurosci.org/content/45/4...
jneurosci.org
Cognitive Maps in the Prefrontal Cortex
The prefrontal cortex (PFC) is critical for our ability to rapidly and flexibly adapt our behavior in new environments based on our previous experience. Despite its importance, the neural substrates a...
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Mathias Sablé-Meyer @mathiassablemeyer.bsky.social · 14/11/2025
Come join us at #SfN25 for the minisymposium "Cognitive Maps in the Prefrontal Cortex"! Saturday, Nov 15, 2:00-4:30pm, Room SDCC 6CF www.abstractsonline.com/pp8/#!/21171... We will explore how the PFC represents structured relationships across species and how this supports flexible behavior.
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Blake Russell @neurorussell.bsky.social · 15/10/2025
🚨New pre-print!🚨 Can we truly independently read and write neuronal activity at the same time using all-optical techniques? Here we show that even two-photon imaging over large fields of view with low dwell time per cell can bias neural dynamics! Read on for some potential fixes: (1/5)
biorxiv.org
Desensitization of opsin responses during all-optical interrogation depends on imaging parameters
Significance The combination of two-photon calcium imaging and two-photon optogenetic stimulation, termed all-optical interrogation, provides spatial and temporal precision when recording and manipula...
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Helen Barron @helencbarron.bsky.social · 06/10/2025
** We have up to TWO funded PhD positions available in our lab!! Apply below to find new ways to enhance memory👇 Pls retweet ** Deadline: 2nd December 1. Cross-species closed-loopTMR: tinyurl.com/bddu4tp6 2. TUS and TMR in humans: tinyurl.com/jjws5ctj Happy to chat to interested applicants.
tinyurl.com
Enhancing memory using cross-species closed-loop Targeted Memory Reactivation | mrcbndu
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Simon Fisher @profsimonfisher.bsky.social · 04/10/2025
Twenty-four years ago today, our paper “A forkhead-domain gene is mutated in a severe speech and language disorder” was published: www.nature.com/articles/350.... A personal thread about the ups & downs of the journey we took to get to that point....1/n 🗣️🧬🧪
Image shows the first two printed pages of the paper “A forkhead-domain gene is mutated in a severe speech and language disorder” by Cecilia Lai and colleagues, published in Nature in 2001 (volume 413, pages 519-523). The abstract reads as follows:
Individuals affected with developmental disorders of speech and language have substantial difficulty acquiring expressive and/or receptive language in the absence of any profound sensory or neurological impairment and despite adequate intelligence and opportunity. Although studies of twins consistently indicate that a significant genetic component is involved, most families segregating speech and language deficits show complex patterns of inheritance, and a gene that predisposes individuals to such disorders has not been identified. We have studied a unique three-generation pedigree, KE, in which a severe speech and language disorder is transmitted as an autosomal-dominant monogenic trait. Our previous work mapped the locus responsible, SPCH1, to a 5.6-cM interval of region 7q31 on chromosome 7. We also identified an unrelated individual, CS, in whom speech and language impairment is associated with a chromosomal translocation involving the SPCH1 interval. Here we show that the gene FOXP2, which encodes a putative transcription factor containing a polyglutamine tract and a forkhead DNA-binding domain, is directly disrupted by the translocation breakpoint in CS. In addition, we identify a point mutation in affected members of the KE family that alters an invariant amino-acid residue in the forkhead domain. Our findings suggest that FOXP2 is involved in the developmental process that culminates in speech and language.
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Manfredi Castelli @manfredic.bsky.social · 02/10/2025
I’m pleased to share our new paper, “Hippocampal ripple diversity organizes neuronal reactivation dynamics in the offline brain”, out in @cp-neuron.bsky.social ! With @vitorlds.bsky.social and David Dupret, we show that diversity in ripple current profiles shapes reactivation dynamics
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peterdoohan.bsky.social @peterdoohan.bsky.social · 24/09/2025
Planning with attractors in PFC!
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Kris Jensen @kristorpjensen.bsky.social · 24/09/2025
I’m super excited to finally put my recent work with @behrenstimb.bsky.social on bioRxiv, where we develop a new mechanistic theory of how PFC structures adaptive behaviour using attractor dynamics in space and time! www.biorxiv.org/content/10.1...
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Deng Pan @dengpan.bsky.social · 28/08/2025
🚨We believe this is a major step forward in how we study hippocampus function in healthy humans. Using novel behavioral tasks, fMRI, RL & RNN modeling, and transcranial ultrasound stimulation (TUS), we demonstrate the causal role of hippocampus in relational structure learning.
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Ben Kanter @beneuroscience.bsky.social · 26/06/2025
Our new paper out now in Science explores how neural activity in the lateral entorhinal cortex (LEC) *drifts* over time - and *jumps* at key boundaries - to help organize events in memory. 🔗 www.science.org/doi/10.1126/... Here's a quick summary of what we found 🧵👇
science.org
Event structure sculpts neural population dynamics in the lateral entorhinal cortex
Our experience of the world is a continuous stream of events that must be segmented and organized at multiple timescales. The neural mechanisms underlying this process remain unknown. In this work, we...
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The Transmitter @thetransmitter.bsky.social · 26/05/2025
Large-scale projects run the risk of stifling scientific independence. Instead, let’s explore alternative mechanisms of collaboration, writes @neuralreckoning.bsky.social. #neuroskyence www.thetransmitter.org/funding/neur...
thetransmitter.org
Neuroscience needs to empower early-career researchers, not fund moon shots
Large-scale projects run the risk of stifling scientific independence. Instead, let’s explore alternative mechanisms of collaboration.
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Helen Barron @helencbarron.bsky.social · 13/05/2025
*** Come join us !! We are recruiting !! *** How does the brain generate beliefs that go beyond direct experience? How do these mechanisms go awry in psychosis? The Barron lab tinyurl.com/bdf4drjf @MRCBNDU @NDCNOxford are recruiting a new postdoc tinyurl.com/ut4vbwt4 to work in mouse models
tinyurl.com
Barron Group | mrcbndu
Our group investigates how cells and circuits in the brain work together to perform computations that support memory. Using a wide range of technical approaches, we investigate how these computations ...
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Mohamady El-Gaby @melgaby.bsky.social · 09/05/2025
This is not to be missed. You’ll spend your day trying to make RNNs psychotic. And we’ll pay you for it!
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European Commission @ec.europa.eu · 05/05/2025
"Science is an investment. We will put forward a new 500 million package for 2025-2027 to support the best and the brightest researchers and scientists from Europe and around the world." — President @vonderleyen.ec.europa.eu at the ‘Choose Europe for Science' event at La Sorbonne 🇫🇷
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Mohamady El-Gaby @melgaby.bsky.social · 08/04/2025
How do cognitive maps fail? And how can this help us understand/treat psychosis? My lab at @oxexppsy.bsky.social is hiring a Postdoc tinyurl.com/2p935hhz and RA tinyurl.com/3myfpb78 to answer these questions in mouse models. Here's why you might want to join: 🧵
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Jacob Bakermans @bakermansjjw.bsky.social · 17/03/2025
Happy to share the latest version of our work on compositional maps in hippocampus with Jo Warren, @jcrwhittington.bsky.social, @behrenstimb.bsky.social. We propose hippocampus constructs maps from cortical building blocks in replay – now with empirical support! www.nature.com/articles/s41... 1/9
nature.com
Constructing future behavior in the hippocampal formation through composition and replay - Nature Neuroscience
A model of compositional state spaces in the hippocampus shows latent learning and rapid generalization. Bakermans et al. show that this model predicts the emergence of place responses in replay.
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Kris Jensen @kristorpjensen.bsky.social · 21/12/2024
I wrote an introduction to RL for neuroscience last year that was just published in NBDT: tinyurl.com/5f58zdy3 This review aims to provide some intuition for and derivations of RL methods commonly used in systems neuroscience, ranging from TD learning through the SR to deep and distributional RL!
tinyurl.com
An introduction to reinforcement learning for neuroscience | Published in Neurons, Behavior, Data analysis, and Theory
By Kristopher T. Jensen. Reinforcement learning for neuroscientists
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Sumedha Nalluru @sumedhanalluru.bsky.social · 13/12/2024
Our paper "Memory reactivation generates new, adaptive behaviours that reach beyond direct experience" is now out www.nature.com/articles/s41...! With Annie Rawson, Jill O’Reilly and Helen Barron at MRC BNDU @ndcnoxford.bsky.social 1/6
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