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We confirmed this with additional experiments and analysis dealing with potential issues with target location and saturation of adaptation. 7/7
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We thus had people reach under a mirror reversal, isolating implicit adaptation. They couldn't compensate, instead increasing error from one trial to the next. That shows implicit adaptation is driven by direct policy updates, not forward model based learning. 6/7pic.twitter.com/PspLAfkWdz
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But direct policy learning will not deal with a mirror reversal. If you keep shifting output rightwards in response to a leftward cursor error, you will increase cursor error in the next trial. 5/7pic.twitter.com/1Pja17CLT8
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Both approaches would work to deal with a VMR. However, only learning a forward model (then inverting it) would be able to eventually deal with a mirror reversal. If the cursor goes the opposite way, why can’t you learn to predict just that? 4/7
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However, errors (even sensory prediction ones) could instead *directly* train the control policy, adapting motor commands. This can rely e.g. on simple rules about how errors should shift motor output: if the error is leftward, shift motor output rightward. 3/7
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One way is to use errors to train a forward model and then “invert” it to get the adapted motor command. Because adaptation is driven by sensory prediction error (which implies a sensory prediction, i.e. forward model output), one would think this is how things work. 2/7
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Our latest work with
@adrianhaith and@blamlab is finally out on biorxiv! Here, we tackle the question: by which mechanism does the motor system get from sensory prediction error to adapted movement? 1/nhttps://www.biorxiv.org/content/10.1101/2020.01.22.914473v1 …Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
I thought it could surface in DC where the train would stop. But apparently it went unnoticed until later, and went all the way to Boston South Station (the 'R' key is still working though). New year's resolution: better, automatic backups and being more careful 2/2
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A big thank you to
@Amtrak for finding and returning my laptop! Jetlagged and tired after a two-flight then train ride coming back to Baltimore after the holidays, I half-asleep walked out of the train leaving my laptop in the pouch in front of my seat. 1/2Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
For Halloween, I should dress up as Reviewer #2. Spooky
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And two more exciting findings with
@MeretBr and Scott Albertpic.twitter.com/YzQPOpPKMT
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Join me on the
#sfn19 poster floor this morning (F37) to talk about the relationship between abnormal resting posture and active reaching/ holding after stroke - with@blamlab and@reziliusRezaPrikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Alkis Hadjiosif proslijedio/la je Tweet
This is the rejection letter for the work that just won the Nobel Prize. Believe in yourself. Everyone else will catch up eventually.pic.twitter.com/gi5Jk1rEzt
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Alkis Hadjiosif proslijedio/la je Tweet
The full schedule for MLMC 2019 is now available at http://motor-conference.org Congratulations to authors of accepted abstracts - we look forward to hearing your talks! See you in Chicago.
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Time to start getting
#SfN19 posters readyhttps://twitter.com/nathanwpyle/status/1176860147223867393 …
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Alkis Hadjiosif proslijedio/la je Tweet
The day before SFN there is a wonderful 1day meeting on computational motor control. The talks are selected from submitted abstracts, and often given by the lead author, a chance to shine in front of a large audience. Abstracts are due in a few weeks. http://www.motor-conference.org/openconf.php
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Alkis Hadjiosif proslijedio/la je Tweet
Just published from BLAM-lab. Practice induces a qualitative change in the memory representation for visuomotor learning | Journal of Neurophysiology https://www.physiology.org/doi/abs/10.1152/jn.00830.2018#.XUwYOv1bKmU.twitter …
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Don't worry Edmure, you can still join the Democratic primary
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Is it me or is there an uncommonly high number of 50-year anniversaries this year? From neuro -
#sfn, Johns Hopkins Neurology, Marr's paper - to the moon landing, Woodstock, and StonewallHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
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