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Aditya Krishna

@adikrish.bsky.social
135 followers 283 following 10 posts

PhD student at Johns Hopkins Bat Lab | Hopkins Kavli NDI Distinguished Graduate Fellow| bats, hippocampus, superior colliculus

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Reposted by Aditya Krishna
Jolyon Troscianko @jtroscianko.bsky.social · 10h
🦋 Butterfly wing patterns create motion illusions that protect them from predators! Our new study (8 years in the making) is out in Nature today doi.org/10.1038/s415... @grahancock.bsky.social @esbriolat.bsky.social @scienceanna.bsky.social @lauraakelley.bsky.social @uniexecec.bsky.social
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Tessa Montague @tessamontague.bsky.social · 29/09/2026
I'm excited to share our new preprint: Generation of a transgenic cephalopod tinyurl.com/pc86jxz8 Cephalopods (cuttlefish, octopus & squid) are crazy critters that dynamically camouflage to their surroundings by changing the color, pattern, & texture of their skin, which they control w their brain.
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Matt Lovett-Barron @mlovettbarron.bsky.social · 23/09/2026
Our lab's latest paper on the neurobiology of collective behavior is now published www.nature.com/articles/s41... This is the work of a great team in the lab - led by Jo-Hsien Yu, with Geoff Meyerhof, Jimjohn Milan, and Julia Napoli @nature.com @danionella.bsky.social
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Nature Methods @natmethods.nature.com · 22/09/2026
WILD: a wireless device for studies of brain activity in freely moving animals under naturalistic conditions. www.nature.com/articles/s41...
nature.com
A wireless modular platform for neuro-behavioral recording and closed-loop manipulation in small animals - Nature Methods
WILD is a wireless device that can record neuronal activity, perform optogenetic stimulations, record animal movements, record the environment or eye movements via an integrated camera, analyze the da...
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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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(((Dr Hannah Wirtshafter))) 🔬 @aheadofthenerve.bsky.social · 15/09/2026
Hi friends & colleagues! I’m on the hunt for a tenure-track home! I’m a BRAIN Initiative K99/R00 scholar studying learning & memory at the intersection of experimental neuroscience, theory, & machine learning/AI. I’d love to connect & would appreciate help spreading the word! web.mit.edu/hsw/www/
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Daniel Reznik 🎶 @reznikdaniel.bsky.social · 08/09/2026
Now out in Hippocampus!! 📣💥 We examined anatomical inputs to the hippocampal region in six species - the tenrec, rat, marmoset, cat, macaque, and human - and found that hippocampal processing operates on fundamentally different types of information across species! (1/3) dx.doi.org/10.1002/hipo...
dx.doi.org
Phylogeny of Cortical‐Hippocampal Projections Reveals Selective Elimination of Input From Sensory Regions
The study of cross-species differences in the organization of the cerebral cortex received significant attention during the past century. However, the evolutionary principles governing changes in bra...
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Jieyu Zheng @jieyusz.bsky.social · 04/09/2026
How fast can mice learn complex mazes? With @mameister4.bsky.social we reveal memory, generalization, latent learning, and remote credit assignment of mice in the Manhattan Maze. Do mice born without a cortex or hippocampus have them too? Check it out! www.biorxiv.org/content/10.6...
biorxiv.org
Rapid spatial cognition in mice, with and without neocortex and hippocampus
Rapid learning, memory, and generalization are often attributed to circuits of the neocortex and hippocampus, but their specific role remains unclear. To examine these cognitive abilities together in ...
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Enny van Beest @ennyvb.bsky.social · 04/09/2026
Textbook: tracking position during navigation is primarily the job of the hippocampus. Recent findings suggest a more complicated story. Recording >20k neurons brainwide, we indeed find spatial representations in every region! With @kenneth-harris.bsky.social and @carandinilab.net
Brainwide representations of a virtual corridor
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Jim Heys @jim-heys.bsky.social · 03/09/2026
I’m very excited to share our new paper, led by the very talented Jack Bowler, a postdoc in the lab! www.nature.com/articles/s41... We all know that the way we learn something matters. But how does a training curriculum actually shape how the brain learns to solve a problem? a 🧵 1/N
nature.com
Structured experience shapes strategy learning and neural dynamics in the medial entorhinal cortex - Nature Neuroscience
The authors use recurrent neural networks to predict how structured prior experience shapes neural dynamics as mice learn flexible timing strategies during complex context-dependent behavior.
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Aditya Krishna @adikrish.bsky.social · 18/08/2026
Fantastic new work from Nikita Finger in the lab, investigating sensory conflict in Egyptian fruit bats by fitting them with prisms!!
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International Society for Neuroethology @neuroethology.org · 07/08/2026
Beautiful comparative study on the active sensing strategies employed by Rousettus aegyptiacus and Carollia perspicillata that were navigating in a "L" shaped corridor🦇. Sonar gaze reliably anticipated the direction of subsequent heading changes in both species. link.springer.com/article/10.1...
link.springer.com
Looking ahead: echolocation and flight behaviors of two fruit bat species navigating a corridor - Journal of Comparative Physiology A
Bats navigating clutter must steer around obstacles to avoid collision, while simultaneously planning future flight trajectories. In this study, we investigated active sensing strategies of two bat sp...
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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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International Society for Neuroethology @neuroethology.org · 31/07/2026
Aditya Krishna speaks about "Predictive coding of moving objects in the #bat #hippocampus" 🦇🧠 #ICN2026
Aditya Krishna on stage
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Mohammed Khallaf @khallaf.bsky.social · 15/07/2026
Our new paper is out in @nature.com! We uncovered how a naked mole-rat queen 👑 controls an entire colony: a natural contraceptive scent that suppresses reproduction in other females! A remarkable mammalian parallel to bees and ants! 🐝🐜 @garyrlewin.bsky.social youtu.be/enfv3zJrWKM?...
youtu.be
Naked mole-rats are ruled by a queen: this chemical puts her in power
YouTube video by nature video
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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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Joel Marthelot @joelmarthelot.bsky.social · 13/06/2026
Fresh off the press! Jeongeun and Yoël’s work on the lightning-fast actuation of the Venus flytrap. 🪴⚡ No muscles. No nerves. So what powers the trap? Cutting the trap suppresses its mechanical amplifier, the snap-through instability, and reveals the active motion. www.science.org/doi/10.1126/...
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bioRxiv Neuroscience @biorxiv-neursci.bsky.social · 11/06/2026
A Two-Dimensional Grid-Cell Code for Three-Dimensional Navigation in Freely Flying Bats www.biorxiv.org/content/10.64898/20…
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Aditya Krishna @adikrish.bsky.social · 02/06/2026
Excited to share a review with @gracecapshaw.bsky.social and @batwoman123.bsky.social in Current Opinion in Neurobiology! Natural auditory behaviors invoke cognitive brain networks. www.sciencedirect.com/science/arti...
sciencedirect.com
Natural auditory behaviors invoke cognitive brain networks
Auditory processing is traditionally framed as a hierarchical extraction of acoustic features along a canonical ascending pathway, starting in the coc…
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International Society for Neuroethology @neuroethology.org · 28/05/2026
New paper from Ulanovsky's group: With brain recordings from🦇 flying in a 200m tunnel, the group discovered that place cells of CA1 exhibit dense spatial coding, i.e., multiple place fields, and cells of CA3 exhibit ultrasparse coding, i.e., one place field. www.nature.com/articles/s41...
nature.com
Sparse-to-dense coding transformation between hippocampal areas CA3 and CA1 - Nature
The hippocampus exhibits a CA3-to-CA1 coding transformation that combines fast learning with an efficient, compressed neural code.
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Sarah Ruediger @ruedigersarah.bsky.social · 19/05/2026
How does #vision shape spatial maps in the hippocampus? Check out our brand new preprint 👇 As someone who did a PhD on the #hippocampus & postdoc on visual cortex and superior colliculus, it's such a joy to start closing the loop - especially with such a great team! 😊
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Drew Schreiner @schreinerdrew.bsky.social · 13/05/2026
Where, exactly, does learning happen in the brain? Out today in @nature.com, we identify a synaptic locus of birdsong learning and show that the circuit can be tuned to make birds learn faster - but at a cost. Read on👇 #neuroskyence 🧪 #prattle 💬 #bioacoustics Shareable link: rdcu.be/fiyrS
nature.com
A synaptic locus of song learning - Nature
Combining a computational framework and optogenetic and chemogenetic manipulations within and downstream of the cortico-basal ganglia circuit identifies the specific cortico-basal ganglia synapse...
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Dirk Gütlin @gutlin.bsky.social · 11/05/2026
Rethinking hierarchy: the auditory system as an integrated cortical–subcortical network www.nature.com/articles/s41...
nature.com
Rethinking hierarchy: the auditory system as an integrated cortical–subcortical network - Nature Reviews Neuroscience
The auditory system differs from other senses in the complexity of its subcortical pathways. King and colleagues examine how subcortical structures transform sound representations and integrate sensor...
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Arkarup Banerjee @arkarupbanerjee.bsky.social · 07/05/2026
Really excited to see this in print!
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SP Arun @sparuniisc.bsky.social · 29/04/2026
Preprint alert! We've done the first ever wireless brain recordings from the high-level visual & motor regions (IT/PMv/PFC) in monkeys engaged in natural behaviors as well as during controlled screen-based tasks. Read below for a lay summary and the link for details! 1/8
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andy alexander @andyalexander.bsky.social · 28/04/2026
Very excited to announce the first preprint from the lab @ucsantabarbara.bsky.social -- "Predictive pursuit emerges in high-dimensional RNNs." @wtredman.bsky.social (starting his own group at JHU this fall) summarizes the work nicely in this thread.
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Matteo Guardamagna @matteoguardamagna.bsky.social · 11/03/2026
1/7 🧠 My journey into development begins with this work and question: how does the brain's spatial navigation system develop? We found that the neural networks for spatial navigation (tori and rings) are preconfigured and only later anchor gradually to the world with experience! 🧵
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Omri Raccah @omriraccah.bsky.social · 06/03/2026
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
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Peter Rodgers @drpeterrodgers.bsky.social · 03/03/2026
How can moths navigate for THOUSANDS of kilometres in the dark? Read more in this research article and related Insight article about moths called fall armyworms in @elife.bsky.social: elifesciences.org/reviewed-pre... elifesciences.org/articles/110... Image credit: David Hobern CC BY 2.0
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(((Dr Hannah Wirtshafter))) 🔬 @aheadofthenerve.bsky.social · 19/02/2026
New preprint out 🎉 What happens to the hippocampal “place code” when an animal is actively engaged in a task? The answer surprised us (and might surprise you too!). Let's dive in ⬇️ Link: "Hippocampal trace coding dominates and disrupts place coding" www.biorxiv.org/content/10.6...
biorxiv.org
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Edvard I Moser @edvardmoser.bsky.social · 19/02/2026
A half-century old question may have its final answer. Using high-resolution #Mini2P microscopes, we find no evidence of local topography in #PlaceCells. Place fields of neighbouring cells are no more similar than those of randomly selected cells. 🧠🗺️ Out now in @pnas.org www.pnas.org/doi/10.1073/...
pnas.org
Place cells in CA1 lack topographical organization of firing locations | PNAS
Topography is a well-described and well-known concept for cortical organization in primary sensory and motor cortices of mammalian brains. Similar ...
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Athena Akrami @athenaakrami.bsky.social · 16/02/2026
Thrilled to finally share this work! 🧠🔊 Using a new reinforcement-free task we show mice (like humans) extract abstract structure from sound (unsupervised) & dCA1 is causally required by building factorised, orthogonal subspaces of abstract rules. Led by Dammy Onih! www.biorxiv.org/content/10.6...
biorxiv.org
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Adrien Peyrache @apeyrache.bsky.social · 11/02/2026
New paper alert! 🚨 We found that the brain's compass is remarkably stable at two scales 1️⃣ the system maintains its internal organization for weeks 2️⃣ It "remembers" its orientation for weeks, even after a single visit This may be key to how the brain aligns its other maps. Paper: rdcu.be/e3waP
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Theo Sanderson @theo.io · 08/02/2026
I made a map of 3.4 million Bluesky users - see if you can find yourself! bluesky-map.theo.io I've seen some similar projects, but IMO this seems to better capture some of the fine-grained detail
bluesky-map.theo.io
Bluesky Map
Interactive map of 3.4 million Bluesky users, visualised by their follower pattern.
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Chris Krupenye @chriskrupenye.bsky.social · 05/02/2026
Imagination in bonobos! I am thrilled to share a new paper w/ Amalia Bastos, out now in @science.org We provide the first experimental evidence that a nonhuman animal can follow along a pretend scenario & track imaginary objects. Work w/ Kanzi, the bonobo, at Ape Initiative youtu.be/NUSHcQQz2Ko
youtu.be
Apes Share Human Ability to Imagine
YouTube video by Johns Hopkins University
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Edvard I Moser @edvardmoser.bsky.social · 28/01/2026
The hippocampal map has its own attentional control signal! Our new study reveals that theta #sweeps can be instantly biased towards behaviourally relevant locations. See 📹 in post 4/6 and preprint here 👉 www.biorxiv.org/content/10.6... 🧵(1/6)
biorxiv.org
Attention-like regulation of theta sweeps in the brain's spatial navigation circuit
Spatial attention supports navigation by prioritizing information from selected locations. A candidate neural mechanism is provided by theta-paced sweeps in grid- and place-cell population activity, which sample nearby space in a left-right-alternating pattern coordinated by parasubicular direction signals. During exploration, this alternation promotes uniform spatial coverage, but whether sweeps can be flexibly tuned to locations of particular interest remains unclear. Using large-scale Neuropixels recordings in freely-behaving rats, we show that sweeps and direction signals are rapidly and dynamically modulated: they track moving targets during pursuit, precede orienting responses during immobility, and reverse during backward locomotion — without prior spatial learning. Similar modulation occurs during REM sleep. Canonical head-direction signals remain head-aligned. These findings identify sweeps as a flexible, attention-like mechanism for selectively sampling allocentric cognitive maps. ### Competing Interest Statement The authors have declared no competing interest. European Research Council, Synergy Grant 951319 (EIM) The Research Council of Norway, Centre of Neural Computation 223262 (EIM, MBM), Centre for Algorithms in the Cortex 332640 (EIM, MBM), National Infrastructure grant (NORBRAIN, 295721 and 350201) The Kavli Foundation, https://ror.org/00kztt736 Ministry of Science and Education, Norway (EIM, MBM) Faculty of Medicine and Health Sciences; NTNU, Norway (AZV)
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Drew Schreiner @schreinerdrew.bsky.social · 21/01/2026
Where does learning through imitation happen in the brain? In juvenile zebra finches, we pinpoint a synaptic locus of song learning in a cortico-basal ganglia circuit and leverage this localization to measure the timescale of consolidation and make birds learn faster! #neuroskyence (1/14)
biorxiv.org
A synaptic locus of song learning
Learning by imitation is the foundation for verbal and musical expression, but its underlying neural basis remains obscure. A juvenile male zebra finch imitates the multisyllabic song of an adult tutor in a process that depends on a song-specialized cortico-basal ganglia circuit, affording a powerful system to identify the synaptic substrates of imitative motor learning. Plasticity at a particular set of cortico-basal ganglia synapses is hypothesized to drive rapid learning-related changes in song before these changes are subsequently consolidated in downstream circuits. Nevertheless, this hypothesis is untested and the synaptic locus where learning initially occurs is unknown. By combining a computational framework to quantify song learning with synapse-specific optogenetic and chemogenetic manipulations within and directly downstream of the cortico-basal ganglia circuit, we identified the specific cortico-basal ganglia synapses that drive the acquisition and expression of rapid vocal changes during juvenile song learning and characterized the hours-long timescale over which these changes consolidate. Furthermore, transiently augmenting postsynaptic activity in the basal ganglia briefly accelerates learning rates and persistently alters song, demonstrating a direct link between basal ganglia activity and rapid learning. These results localize the specific cortico-basal ganglia synapses that enable a juvenile songbird to learn to sing and reveal the circuit logic and behavioral timescales of this imitative learning paradigm. ### Competing Interest Statement The authors have declared no competing interest. National Institutes of Health, K99 NS144525 (DCS), F32 MH132152 (DCS), F31 HD098772 (SB), R01 NS099288 (RM), RF1 NS118424 (RM and JP)
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Tay (Antonio J. Osuna Mascaró) @biotay.bsky.social · 19/01/2026
Cow Tools! We have lived alongside cows for nearly 10,000 years. We breed them and exploit them It is now, only now, that we have discovered THEY CAN USE TOOLS Here I describe our study (paper) www.sciencedirect.com/science/arti... in @currentbiology.bsky.social with @auersperga.bsky.social
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Adrien Peyrache @apeyrache.bsky.social · 15/01/2026
So cool to see this one out! Congrats @markbrandonlab.bsky.social and the gang!!!!
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Alexandra Keinath @atkeinath.bsky.social · 08/12/2025
Another new paper from the lab: Predictive theories like the SR imply that navigators who navigate differently should have cognitive maps which differ in predictable ways. Here we show that this holds in mouse hippocampal CA1. www.sciencedirect.com/science/arti...
sciencedirect.com
Environmental representations in mouse hippocampal CA1 reflect the predictive structure of navigation
Predictive theories of cognitive mapping propose that these representations encode the predictive relationships among contents as experienced by the n…
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Ulises Pereira-Obilinovic @ulisespereirao.bsky.social · 02/12/2025
0/10 Thanks for the interest in our preprint. Some takes say it negates or fully supports the “manifold hypothesis”, neither quite right. Our results show that if you only focus on the manifold capturing most of task-related variance, you could miss important dynamics that actually drive behavior.
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Portugues Lab @portugueslab.bsky.social · 24/11/2025
(1/n) We are excited to share our new paper in Nature Communications, by Hagar Lavian (@hlavian.bsky.social) and team, revealing how the zebrafish brain integrates visual navigation signals! www.nature.com/articles/s41...
nature.com
Visual motion and landmark position align with heading direction in the zebrafish interpeduncular nucleus - Nature Communications
How are various visual signals integrated in the vertebrate brain for navigation? Here authors show that different spatial signals are topographically organized and align to one another in the zebrafi...
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Arkarup Banerjee @arkarupbanerjee.bsky.social · 19/11/2025
As a longtime fan of cool papers in @currentbiology.bsky.social, I am really thrilled to see this out! This study sets the stage for understanding the origins of novel (vocal) behaviors. Big shout out to the main architects of this work @xmikezheng20.bsky.social and @cliffscience.bsky.social
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Chiara Fornetto @chiarafornetto.bsky.social · 04/11/2025
Excited to share our paper now published in Cell! 'Zebrafish use spectral information to suppress the visual background' Huge thanks to @neurofishh.bsky.social & @teuler.bsky.social @cellpress.bsky.social @cp-cell.bsky.social 👇🏻 www.cell.com/cell/fulltex...
cell.com
Zebrafish use spectral information to suppress the visual background
Vertebrate eyes first evolved in water, where spectral content rapidly fades with distance. Zebrafish exploit this loss by antagonizing cone signals to suppress the background, pointing to distance es...
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Marcelo Moglie @mjmoglie.bsky.social · 03/11/2025
Proud to have contributed to @gaiabianchini.bsky.social and @flor-iacaruso.bsky.social new paper on how the superior colliculus temporally integrates multisensory information
nature.com
Functional specialisation of multisensory temporal integration in the mouse superior colliculus - Nature Communications
Whether and how anatomically distinct regions of the superior colliculus (SC) exhibit specialisation in multisensory temporal integration to facilitate different behavioural responses are not fully un...
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Jonathan A. Michaels @jonathanamichaels.bsky.social · 29/10/2025
Thrilled that our paper is out today in Nature! www.nature.com/articles/s4...
nature.com
Sensory expectations shape neural population dynamics in motor circuits
Nature - Experiments with human volunteers and macaques show that expectations produced by probabilistic cueing of future sensory inputs shape motor circuit dynamics in order to increase the...
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Susanne Babl @susannebabl.bsky.social · 25/10/2025
Our new paper is now in BioRxiv ☺️ See how the auditory cortex encodes vocalizations before the bat produces them 📣🦇🧠 www.biorxiv.org/content/10.1... with @talking-bat.bsky.social and Dennis Röhrig!
biorxiv.org
Neurons in the bat auditory cortex encode class and complexity of future vocalizations
Vocal production is a complex behavior across the animal kingdom that relies on coordinated motor and auditory networks. However, the contribution of sensory areas in vocal control remains poorly unde...
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Kelsey Tyssowski @kelseytea.bsky.social · 22/10/2025
🧠🌟🐭 Excited to share some of my postdoc work on the evolution of dexterity! We compared deer mice evolved in forest vs prairie habitats. We found that forest mice have: (1) more corticospinal neurons (CSNs) (2) better hand dexterity (3) more dexterous climbing, which is linked to CSN number🧵
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The Transmitter @thetransmitter.bsky.social · 16/10/2025
The work with bats on barren, 7-acre Latham Island was Nachum Ulanovsky’s most complex undertaking yet. By @claudia-lopez.bsky.social #neuroskyence www.thetransmitter.org/neuroetholog...
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