@liyi-start.bsky.social
Reposted
In fact, in some recent work, we showed that transiently blocking some proprioceptive feedback *increases* the dimensionality of dynamics along a direction orthogonal to the task manifold, with only *weak* effects on behavioral trajectories.
Motor Cortical Output Integrates Distorted Proprioceptive Feedback
Proprioceptive feedback from muscles is essential for continuous monitoring and precise control of limb movement, yet how such peripheral feedback is integrated into ongoing descending motor cortical ...
www.biorxiv.org
November 24, 2025 at 1:16 AM
In fact, in some recent work, we showed that transiently blocking some proprioceptive feedback *increases* the dimensionality of dynamics along a direction orthogonal to the task manifold, with only *weak* effects on behavioral trajectories.
Reposted
Not directly related to @neurograce.bsky.social’s comment here but to the thread: I am baffled by the number of people who seem to think the claim is that all brain computation is low-d vs. the *emprical* finding that task-related neural activity is (linear) low-d in many (not all) cases.
This kind of stuff is why I say that I worry that the tools of neuroscience are not properly vetted
“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.”
November 24, 2025 at 1:16 AM
Not directly related to @neurograce.bsky.social’s comment here but to the thread: I am baffled by the number of people who seem to think the claim is that all brain computation is low-d vs. the *emprical* finding that task-related neural activity is (linear) low-d in many (not all) cases.