Magdalena Sabat

@magdalenasabat.bsky.social

Post-doc in Computational Cognitive Science at Leiden & Amsterdam University

🚨Fed up with the "individual vs. system change" debate?🚨 We've got you covered. 🙌 In our new paper in Nature Climate Change, we endeavour to move beyond that binary by introducing the agency frame (a-frame), a practical lens for identifying and intervening on high-impact climate behaviours. (1/n)

Cognitive Modelling Research in the Era of Agentic Large Language Models From equations to fitted models in minutes: how LLMs are changing computational cognitive science and how we should adapt My latest post on Medium medium.com/@stefano.pal...

Cognitive Modelling Research in the Era of Agentic Large Language Models

From equations to fitted models in minutes: what LLMs are changing in computational cognitive science and how we should adapt.

medium.com

Postdoc position in Paris: come help develop new generation human brain computer interfaces ⚡🧠💻 Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems. See below for + details and retweet 🙏

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Y’all are reading this paper in the wrong way. We love to trash dominant hypothesis, but we need to look for evidence against the manifold hypothesis elsewhere: This elegant work doesn't show neural dynamics are high D, nor that we should stop using PCA It’s quite the opposite! (thread)

Dan Levenstein@dlevenstein.bsky.social · 9mo ago

“Our findings challenge the conventional focus on low-dimensional coding subspaces as a sufficient framework for understanding neural computations, demonstrating that dimensions previously considered task-irrelevant and accounting for little variance can have a critical role in driving behavior.”

So happy this paper is now out in @plosbiology.org! We investigated whether fluctuations in MEPs can be explained by phasic influences from internal bodily rhythms, and whether this might happen independently per organ system. #interoception #neuroskyence

PLOS Biology@plosbiology.org · 9mo ago

How do internal bodily rhythms influence #brain activity & motor function? @tahnee-engelen.bsky.social &co show that #cardiac, #respiratory & #gastric rhythms independently modulate motor excitability, revealing distinct #interoceptive profiles across individuals @plosbiology.org 🧪 plos.io/4nMtpLT

Top: Experimental set up. Single pulses of TMS were applied to the hand area of the right primary motor cortex with an inter-pulse interval randomized between 6 and 10 s. Simultaneously, the neuronavigated coil position (yellow), electrocardiogram (red), respiratory signal (blue), electrogastrogram (green), and electromyography from the left hand (gray) were recorded. The figure shows traces of a 20-s time segment from one participant of the cardiac (raw), respiratory (filtered), gastric (filtered), and EMG (raw) signals. The experimental measure was the Motor Evoked Potential amplitude measured on a hand muscle (first dorsal interosseous), analyzed against the phase of the cardiac, respiratory, and gastric rhythms. Note that the three rhythms have very different periods (~1 s for the heart, ~ 5 s for respiration, and ~20 s for the gastric rhythm). Bottom: Artwork illustrating how rhythms of the internal organs interact with the moment-to-moment fluctuations observed in corticospinal motor excitability. Image depicts an outline of a brain with representations of the three rhythmic organs influencing the motor system: the heart, lungs, and stomach. Image credit: Tahnée Engelen.

When change moves faster than systems can adapt, they tip Our culture of “now-ism” risks pushing climate, economies and societies past their limits The latest #ComplexityThoughts: 👉 manlius.substack.com/p/how-modern... 🎧 on Spotify and Apple #ComplexSystems #Resilience @ricardsole.bsky.social

How modern “now-ism“ can accelerate crises in climate, finance and ecosystems

Slowing change may be our last line of defense

manlius.substack.com

📈🧠 We're looking for brains! 🧠📈 Postdoc + PhD positions are available to help pioneer fetal MEG with optically pumped magnetometers, measuring prenatal responses to sound and light to understand how we start making sense of the world even before we're born. 🐣 Please get in touch to hear more!

schematic of fetal OPM-MEG

“Mapping ion channel function” doi.org/10.7554/eLif... isn’t exactly a citation slayer, but it’s still one of my favourites (& my first independent project). Today we push pt 2, where we trace code origin & unite almost all channel models in a common expression. Boom! www.biorxiv.org/content/10.1...

An ion channel omnimodel for standardized biophysical neuron modelling

Biophysical neuron modeling is an indispensable tool in neuroscience research, with the combination of diverse ion channel kinetics and morphologies being used to explain various single-neuron propert...

biorxiv.org

Ever wondered why you keep going to that restaurant with stale fries? Is it because you went often in the past (perseveration) or because you remember past good experiences better (positivity bias)? Our study out in PNAS investigates the normative basis for these biases www.pnas.org/doi/10.1073/...

Evolving choice hysteresis in reinforcement learning: Comparing the adaptive value of positivity bias and gradual perseveration | PNAS

The tendency to repeat past choices more often than expected from the history of outcomes has been repeatedly empirically observed in reinforcement...

pnas.org