Skip to Main content Skip to Navigation
Journal articles

Trajectory formation principles are the same after mild or moderate stroke

Abstract : When we make rapid reaching movements, we have to trade speed for accuracy. To do so, the trajectory of our hand is the result of an optimal balance between feed-forward and feed-back control in the face of signal-dependant noise in the sensorimotor system. How far do these principles of trajectory formation still apply after a stroke, for persons with mild to moderate sensorimotor deficits who recovered some reaching ability? Here, we examine the accuracy of fast hand reaching movements with a focus on the information capacity of the sensorimotor system and its relation to trajectory formation in young adults, in persons who had a stroke and in age-matched control participants. We find that persons with stroke follow the same trajectory formation principles, albeit parameterized differently in the face of higher sensorimotor uncertainty. Higher directional errors after a stroke result in less feed-forward control, hence more feed-back loops responsible for segmented movements. As a consequence, movements are globally slower to reach the imposed accuracy, and the information throughput of the sensorimotor system is lower after a stroke. The fact that the most abstract principles of motor control remain after a stroke suggests that clinicians can capitalize on existing theories of motor control and learning to derive principled rehabilitation strategies.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-01773982
Contributor : Anthony Herrada Connect in order to contact the contributor
Submitted on : Wednesday, April 21, 2021 - 2:51:09 PM
Last modification on : Friday, August 5, 2022 - 3:03:20 PM
Long-term archiving on: : Thursday, July 22, 2021 - 6:47:46 PM

File

pone.0173674.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Denis Mottet, Liesjet Elisabeth Henriette van Dokkum, Jérôme Froger, Abdelkader Gouaich, Isabelle Laffont. Trajectory formation principles are the same after mild or moderate stroke. PLoS ONE, Public Library of Science, 2017, 12 (3), pp.e0173674. ⟨10.1371/journal.pone.0173674⟩. ⟨hal-01773982⟩

Share

Metrics

Record views

165

Files downloads

30