Raeed Chowdhury

@raeedcho.com

Research Assistant Professor at the University of Pittsburgh Studying the neuroscience of how we move

Many of the scientific questions we're interested in tackling require studying learning over long periods of time across the brain. This is challenging – which is why we're excited to say we've been developing a system for chronic wireless recording using long Neuropixels probes in macaque monkeys.

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New preprint! 🧵🧪🧠 doi.org/10.64898/202... Upshot: somatosensory cortex contains both feedback *and* intended movement signals (a.k.a. corollary discharge). These two signals exist orthogonally in neural space, flexibly allowing both fast state estimation and external perturbation detection. 1/

Neural trajectory plot showing neural activity moving through orthogonal corollary discharge and feedback signal subspaces

🚨📜+🧵🚨 Very excited about this work showing that people with no hand function following a spinal cord injury can control the activity of motor units from those muscles to perform 1D, 2D and 3D tasks, play video games, or navigate a virtual wheelchair By a wonderful team co-mentored w Dario Farina

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Vishal Rawji@vishrawji.bsky.social · 7mo ago

New preprint! We show that people with tetraplegic spinal cord injury can use their residual motor unit activity to achieve up to three dimensional control using non-invasive high-density surface EMG With my co-first authors Xingchen Yang and Ciara Gibbs www.medrxiv.org/content/10.6... 1/13

When you fail to perform at your best right when it matters the most, what's going on in your brain? We can now provide an explanation: Exceptionally high stakes interfere with the neural signals of motor preparation. I'd love to hear - what do you think causes it? sciencedirect.com/science/arti...

A neural basis of choking under pressure

Incentives tend to drive improvements in performance. But when incentives get too high, we can “choke under pressure” and underperform right when it m…

sciencedirect.com