Dexter Tsin
@dextertsin.bsky.social
PhD student, Princeton Neuroscience Institute
Current interests: social behavior, recurrent neural networks, computational ethology
Current interests: social behavior, recurrent neural networks, computational ethology
Reposted by Dexter Tsin
🚨Our work was accepted to the @neuripsconf.bsky.social : Data on the Brain & Mind workshop!🧠🦾"Massively Parallel Imitation Learning of Mouse Forelimb Musculoskeletal Reaching Dynamics" @talmo.bsky.social @eazim.bsky.social
An imitation learning framework for modeling mouse forelimb control. 1/3
An imitation learning framework for modeling mouse forelimb control. 1/3
November 28, 2025 at 5:01 PM
🚨Our work was accepted to the @neuripsconf.bsky.social : Data on the Brain & Mind workshop!🧠🦾"Massively Parallel Imitation Learning of Mouse Forelimb Musculoskeletal Reaching Dynamics" @talmo.bsky.social @eazim.bsky.social
An imitation learning framework for modeling mouse forelimb control. 1/3
An imitation learning framework for modeling mouse forelimb control. 1/3
Reposted by Dexter Tsin
How do brain areas control each other? 🧠🎛️
✨In our NeurIPS 2025 Spotlight paper, we introduce a data-driven framework to answer this question using deep learning, nonlinear control, and differential geometry.🧵⬇️
✨In our NeurIPS 2025 Spotlight paper, we introduce a data-driven framework to answer this question using deep learning, nonlinear control, and differential geometry.🧵⬇️
November 26, 2025 at 7:32 PM
How do brain areas control each other? 🧠🎛️
✨In our NeurIPS 2025 Spotlight paper, we introduce a data-driven framework to answer this question using deep learning, nonlinear control, and differential geometry.🧵⬇️
✨In our NeurIPS 2025 Spotlight paper, we introduce a data-driven framework to answer this question using deep learning, nonlinear control, and differential geometry.🧵⬇️
Reposted by Dexter Tsin
Journal of Undergraduate Neuroscience Education, Editor-in-Chief, now reporting for duty. 🫡
Catch me at the Faculty for Undergraduate Neuroscience Booth (3928) today and tomorrow from 2-3 pm if you want to chat about your manuscript or what JUNE is up to.
#SfN2025 #SfN25 @sfn.org
Catch me at the Faculty for Undergraduate Neuroscience Booth (3928) today and tomorrow from 2-3 pm if you want to chat about your manuscript or what JUNE is up to.
#SfN2025 #SfN25 @sfn.org
November 17, 2025 at 6:14 PM
Reposted by Dexter Tsin
November 15, 2025 at 10:13 PM
Reposted by Dexter Tsin
Thrilled to share our new paper, out now in @natneuro.nature.com, uncovering how estradiol, the most potent estrogen, modulates reinforcement learning and reward prediction errors across biological levels. www.nature.com/articles/s41...
#blueprint 1/7
#blueprint 1/7
Estrogen modulates reward prediction errors and reinforcement learning - Nature Neuroscience
Dopamine encoding of reward prediction errors naturally fluctuates over females’ reproductive cycles with estrogenic signaling due to reduced expression of dopamine reuptake proteins.
www.nature.com
November 11, 2025 at 2:41 PM
Thrilled to share our new paper, out now in @natneuro.nature.com, uncovering how estradiol, the most potent estrogen, modulates reinforcement learning and reward prediction errors across biological levels. www.nature.com/articles/s41...
#blueprint 1/7
#blueprint 1/7
Reposted by Dexter Tsin
Excited to share our new work with @engeltatiana.bsky.social!
RNNs are often used to explore how the brain may solve specific tasks. We show that, depending on the architecture, RNNs find distinct circuit solutions, behaving differently when exposed to novel stimuli.
www.nature.com/articles/s42...
RNNs are often used to explore how the brain may solve specific tasks. We show that, depending on the architecture, RNNs find distinct circuit solutions, behaving differently when exposed to novel stimuli.
www.nature.com/articles/s42...
Single-unit activations confer inductive biases for emergent circuit solutions to cognitive tasks - Nature Machine Intelligence
Recurrent neural networks are widely used to model brain dynamics. Tolmachev and Engel show that single-unit activation functions influence task solutions that emerge in trained networks, raising the ...
www.nature.com
October 24, 2025 at 7:14 PM
Excited to share our new work with @engeltatiana.bsky.social!
RNNs are often used to explore how the brain may solve specific tasks. We show that, depending on the architecture, RNNs find distinct circuit solutions, behaving differently when exposed to novel stimuli.
www.nature.com/articles/s42...
RNNs are often used to explore how the brain may solve specific tasks. We show that, depending on the architecture, RNNs find distinct circuit solutions, behaving differently when exposed to novel stimuli.
www.nature.com/articles/s42...
Reposted by Dexter Tsin
A study led by Cina Aghamohammadi is now out in @natcomms.nature.com! We developed a mathematical framework for partitioning spiking variability, which revealed that spiking irregularity is nearly invariant for each neuron and decreases along the cortical hierarchy.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
October 12, 2025 at 12:42 AM
A study led by Cina Aghamohammadi is now out in @natcomms.nature.com! We developed a mathematical framework for partitioning spiking variability, which revealed that spiking irregularity is nearly invariant for each neuron and decreases along the cortical hierarchy.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Dexter Tsin
Stoked to share our new review on why neuroendocrinology needs a systems lens and why hormones should matter to systems neuroscience. It’s time for serious cross-talk!
Is it finally time for systems neuroscience to take hormones seriously? OMG YES! @meenakshiasokan.bsky.social and I share some of our thoughts about recent work in this review www.sciencedirect.com/science/arti...
Hormonal regulation of behavioral and emotional persistence: Novel insights from a systems-level approach to neuroendocrinology
Gonadal sex steroid hormones regulate internal states, social drive, perception of external cues, and learning and memory. Fluctuating hormones influe…
www.sciencedirect.com
May 30, 2025 at 8:28 PM
Stoked to share our new review on why neuroendocrinology needs a systems lens and why hormones should matter to systems neuroscience. It’s time for serious cross-talk!
Check out this newest preprint from our lab 🥳 Multi-fiber + behavior quantification for the win
Very excited and proud to share my postdoctoral research with @neurrriot.bsky.social looking at the context-specific encoding of social behavior 💃🕺 in hormone-sensitive, large-scale brain networks in mice!
www.biorxiv.org/content/10.1...
#neuroskyence #compneurosky 🧪
1/12
www.biorxiv.org/content/10.1...
#neuroskyence #compneurosky 🧪
1/12
September 25, 2025 at 5:07 PM
Check out this newest preprint from our lab 🥳 Multi-fiber + behavior quantification for the win
Reposted by Dexter Tsin
And we are live!
Excited to announce the 2025 Multi-Agent Behavior Challenge on cross-lab supervised action recognition in mice 🐁🐀🖱️
Running on Kaggle until December 15th, with a $50,000 prize pool going to the top five submissions!
www.kaggle.com/competitions...
Excited to announce the 2025 Multi-Agent Behavior Challenge on cross-lab supervised action recognition in mice 🐁🐀🖱️
Running on Kaggle until December 15th, with a $50,000 prize pool going to the top five submissions!
www.kaggle.com/competitions...
September 18, 2025 at 6:24 PM
And we are live!
Excited to announce the 2025 Multi-Agent Behavior Challenge on cross-lab supervised action recognition in mice 🐁🐀🖱️
Running on Kaggle until December 15th, with a $50,000 prize pool going to the top five submissions!
www.kaggle.com/competitions...
Excited to announce the 2025 Multi-Agent Behavior Challenge on cross-lab supervised action recognition in mice 🐁🐀🖱️
Running on Kaggle until December 15th, with a $50,000 prize pool going to the top five submissions!
www.kaggle.com/competitions...
Reposted by Dexter Tsin
How does the brain decide? 🧠
Our new @nature.com paper shows that neural activity switches from an 'evidence gathering' to a 'commitment' state at a precise moment we call nTc.
After nTc, new evidence is ignored, revealing a neural marker for the instant when the mind is made up.
rdcu.be/eGUrv
Our new @nature.com paper shows that neural activity switches from an 'evidence gathering' to a 'commitment' state at a precise moment we call nTc.
After nTc, new evidence is ignored, revealing a neural marker for the instant when the mind is made up.
rdcu.be/eGUrv
Transitions in dynamical regime and neural mode during perceptual decisions - Nature
Simultaneous recordings were made of hundreds of neurons in the rat frontal cortex and striatum, showing that decision commitment involves a rapid, coordinated transition in dynamical regime and neura...
www.nature.com
September 17, 2025 at 8:12 PM
How does the brain decide? 🧠
Our new @nature.com paper shows that neural activity switches from an 'evidence gathering' to a 'commitment' state at a precise moment we call nTc.
After nTc, new evidence is ignored, revealing a neural marker for the instant when the mind is made up.
rdcu.be/eGUrv
Our new @nature.com paper shows that neural activity switches from an 'evidence gathering' to a 'commitment' state at a precise moment we call nTc.
After nTc, new evidence is ignored, revealing a neural marker for the instant when the mind is made up.
rdcu.be/eGUrv
Reposted by Dexter Tsin
#Cosyne2026 is now open for business!
Show us what you got both for the main meeting & workshop proposals 🧠🥳🧠🥳🧠
Show us what you got both for the main meeting & workshop proposals 🧠🥳🧠🥳🧠
September 9, 2025 at 7:20 AM
#Cosyne2026 is now open for business!
Show us what you got both for the main meeting & workshop proposals 🧠🥳🧠🥳🧠
Show us what you got both for the main meeting & workshop proposals 🧠🥳🧠🥳🧠
Reposted by Dexter Tsin
Super excited to share the first cooperative foraging paradigm in freely interacting mouse pairs! Stable leader and follower roles emerge spontaneously and predict learning. Well-trained mice show stereotyped, role-specific “behavioral motifs” absent in naive animals (1/5)
doi.org/10.1101/2025...
doi.org/10.1101/2025...
September 4, 2025 at 2:21 PM
Super excited to share the first cooperative foraging paradigm in freely interacting mouse pairs! Stable leader and follower roles emerge spontaneously and predict learning. Well-trained mice show stereotyped, role-specific “behavioral motifs” absent in naive animals (1/5)
doi.org/10.1101/2025...
doi.org/10.1101/2025...
Reposted by Dexter Tsin
Excited to share our new preprint on the brain-wide organization of intrinsic timescales at single neuron resolution. Work w/ @roxana-zeraati.bsky.social, @intlbrainlab.bsky.social, Anna Levina, @engeltatiana.bsky.social : www.biorxiv.org/content/10.1...
September 2, 2025 at 2:59 PM
Excited to share our new preprint on the brain-wide organization of intrinsic timescales at single neuron resolution. Work w/ @roxana-zeraati.bsky.social, @intlbrainlab.bsky.social, Anna Levina, @engeltatiana.bsky.social : www.biorxiv.org/content/10.1...
Reposted by Dexter Tsin
We're hiring! The Princeton Neuroscience Institute and Department of Psychology invite applications for a joint hire Assistant Professor in human cognitive neuroscience 🧠
Review of applications begin Oct 15. More details here: puwebp.princeton.edu/AcadHire/app...
Review of applications begin Oct 15. More details here: puwebp.princeton.edu/AcadHire/app...
August 19, 2025 at 6:06 PM
We're hiring! The Princeton Neuroscience Institute and Department of Psychology invite applications for a joint hire Assistant Professor in human cognitive neuroscience 🧠
Review of applications begin Oct 15. More details here: puwebp.princeton.edu/AcadHire/app...
Review of applications begin Oct 15. More details here: puwebp.princeton.edu/AcadHire/app...
Reposted by Dexter Tsin
Come work with us! @princetonneuro.bsky.social and the Department of Psychology at Princeton University are searching for a tenure-track Assistant Professor in the area of human cognitive neuroscience, to be hired jointly in Psychology and Neuroscience: puwebp.princeton.edu/AcadHire/app...
puwebp.princeton.edu
August 13, 2025 at 4:58 PM
Come work with us! @princetonneuro.bsky.social and the Department of Psychology at Princeton University are searching for a tenure-track Assistant Professor in the area of human cognitive neuroscience, to be hired jointly in Psychology and Neuroscience: puwebp.princeton.edu/AcadHire/app...
Reposted by Dexter Tsin
How do animals decide if they should forage for food or stay home to take care of newborn offspring? Whose needs come first? For my PhD work now out in Nature, we examined how hunger and parenting neurons interact and are reshaped postpartum in mice 🧵⬇️ www.nature.com/articles/s41...
A hypothalamic circuit that modulates feeding and parenting behaviours - Nature
Single-cell transcriptomic analysis of mouse hypothalamus and behavioural experiments show that specific hypothalamic networks regulate conflicting feeding versus parenting behaviours of female mice.
www.nature.com
July 30, 2025 at 4:35 PM
How do animals decide if they should forage for food or stay home to take care of newborn offspring? Whose needs come first? For my PhD work now out in Nature, we examined how hunger and parenting neurons interact and are reshaped postpartum in mice 🧵⬇️ www.nature.com/articles/s41...
Reposted by Dexter Tsin
Proposal recommended for funding! Which means we have a fresh, 3-year-funded position available for a computational postdoc interested in studying dynamics of social interactions in rats, with simultaneous Neuropixels data to follow 🐀🐀🐀
Proper job ad pending, but email me if interested!
Proper job ad pending, but email me if interested!
July 15, 2025 at 8:54 PM
Proposal recommended for funding! Which means we have a fresh, 3-year-funded position available for a computational postdoc interested in studying dynamics of social interactions in rats, with simultaneous Neuropixels data to follow 🐀🐀🐀
Proper job ad pending, but email me if interested!
Proper job ad pending, but email me if interested!
Reposted by Dexter Tsin
(1/7) New preprint from Rajan lab! 🧠🤖
@ryanpaulbadman1.bsky.social & Riley Simmons-Edler show–through cog sci, neuro & ethology–how an AI agent with fewer ‘neurons’ than an insect can forage, find safety & dodge predators in a virtual world. Here's what we built
Preprint: arxiv.org/pdf/2506.06981
@ryanpaulbadman1.bsky.social & Riley Simmons-Edler show–through cog sci, neuro & ethology–how an AI agent with fewer ‘neurons’ than an insect can forage, find safety & dodge predators in a virtual world. Here's what we built
Preprint: arxiv.org/pdf/2506.06981
July 2, 2025 at 6:34 PM
(1/7) New preprint from Rajan lab! 🧠🤖
@ryanpaulbadman1.bsky.social & Riley Simmons-Edler show–through cog sci, neuro & ethology–how an AI agent with fewer ‘neurons’ than an insect can forage, find safety & dodge predators in a virtual world. Here's what we built
Preprint: arxiv.org/pdf/2506.06981
@ryanpaulbadman1.bsky.social & Riley Simmons-Edler show–through cog sci, neuro & ethology–how an AI agent with fewer ‘neurons’ than an insect can forage, find safety & dodge predators in a virtual world. Here's what we built
Preprint: arxiv.org/pdf/2506.06981
Reposted by Dexter Tsin
📢🚨I’m elated to share that I’ll be starting as a tenure-track 𝗔𝘀𝘀𝗶𝘀𝘁𝗮𝗻𝘁 𝗧𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗼𝗿 👩🏻🏫 in the Department of Cognitive Science at UC San Diego this July! ☀️ @ucsandiego.bsky.social 1/
#ucsd #newprofessor #womeninSTEM
#ucsd #newprofessor #womeninSTEM
June 25, 2025 at 11:54 AM
📢🚨I’m elated to share that I’ll be starting as a tenure-track 𝗔𝘀𝘀𝗶𝘀𝘁𝗮𝗻𝘁 𝗧𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗼𝗿 👩🏻🏫 in the Department of Cognitive Science at UC San Diego this July! ☀️ @ucsandiego.bsky.social 1/
#ucsd #newprofessor #womeninSTEM
#ucsd #newprofessor #womeninSTEM
Reposted by Dexter Tsin
“Like a group of skiers descending a mountain, each [neuron] prefers a slightly different path, but all are shaped by the same slope,” says PNI's @engeltatiana.bsky.social on her lab’s new @nature.com study revealing how the brain makes decisions.
📰: pni.princeton.edu/news/2025/al...
📰: pni.princeton.edu/news/2025/al...
June 25, 2025 at 3:06 PM
“Like a group of skiers descending a mountain, each [neuron] prefers a slightly different path, but all are shaped by the same slope,” says PNI's @engeltatiana.bsky.social on her lab’s new @nature.com study revealing how the brain makes decisions.
📰: pni.princeton.edu/news/2025/al...
📰: pni.princeton.edu/news/2025/al...
Reposted by Dexter Tsin
Out today in @nature.com: we show that individual neurons have diverse tuning to a decision variable computed by the entire population, revealing a unifying geometric principle for the encoding of sensory and dynamic cognitive variables.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
June 25, 2025 at 10:38 PM
Out today in @nature.com: we show that individual neurons have diverse tuning to a decision variable computed by the entire population, revealing a unifying geometric principle for the encoding of sensory and dynamic cognitive variables.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Dexter Tsin
Thrilled to announce I'll be starting my own neuro-theory lab, as an Assistant Professor at @yaleneuro.bsky.social @wutsaiyale.bsky.social this Fall!
My group will study offline learning in the sleeping brain: how neural activity self-organizes during sleep and the computations it performs. 🧵
My group will study offline learning in the sleeping brain: how neural activity self-organizes during sleep and the computations it performs. 🧵
June 23, 2025 at 3:55 PM
Thrilled to announce I'll be starting my own neuro-theory lab, as an Assistant Professor at @yaleneuro.bsky.social @wutsaiyale.bsky.social this Fall!
My group will study offline learning in the sleeping brain: how neural activity self-organizes during sleep and the computations it performs. 🧵
My group will study offline learning in the sleeping brain: how neural activity self-organizes during sleep and the computations it performs. 🧵
Reposted by Dexter Tsin
Very happy to share the latest from my postdoc!
10 yrs of mouse social networks + 1.25 yrs of acoustic data ➡️ insight into vocalization & sociality in a wild population of your favorite lab model 🐁
paper: bit.ly/4n93yyD
data: bit.ly/4lfFBEk
code: bit.ly/4kNnMwx
#bioacoustics #neuroskyence
1/8
10 yrs of mouse social networks + 1.25 yrs of acoustic data ➡️ insight into vocalization & sociality in a wild population of your favorite lab model 🐁
paper: bit.ly/4n93yyD
data: bit.ly/4lfFBEk
code: bit.ly/4kNnMwx
#bioacoustics #neuroskyence
1/8
June 18, 2025 at 6:26 PM
Very happy to share the latest from my postdoc!
10 yrs of mouse social networks + 1.25 yrs of acoustic data ➡️ insight into vocalization & sociality in a wild population of your favorite lab model 🐁
paper: bit.ly/4n93yyD
data: bit.ly/4lfFBEk
code: bit.ly/4kNnMwx
#bioacoustics #neuroskyence
1/8
10 yrs of mouse social networks + 1.25 yrs of acoustic data ➡️ insight into vocalization & sociality in a wild population of your favorite lab model 🐁
paper: bit.ly/4n93yyD
data: bit.ly/4lfFBEk
code: bit.ly/4kNnMwx
#bioacoustics #neuroskyence
1/8
Reposted by Dexter Tsin
Now out in @natcomms.nature.com: Mice and monkeys spontaneously shift through comparable cognitive states - and it's written all over their faces! (1/7)
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Inferring internal states across mice and monkeys using facial features - Nature Communications
Here, the authors created a virtual reality task for monkeys and mice to explore if internal states like attention are similar across species. Their facial expressions during the task were similar, su...
www.nature.com
June 10, 2025 at 11:21 AM
Now out in @natcomms.nature.com: Mice and monkeys spontaneously shift through comparable cognitive states - and it's written all over their faces! (1/7)
www.nature.com/articles/s41...
www.nature.com/articles/s41...