Learning feedback and feedforward control in a mirror-reversed visual environment

Shoko Kasuga, Sebastian Telgen, Junichi Ushiba, Daichi Nozaki, Jörn Diedrichsen

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

When we learn a novel task, the motor system needs to acquire both feedforward and feedback control. Currently, little is known about how the learning of these two mechanisms relate to each other. In the present study, we tested whether feedforward and feedback control need to be learned separately, or whether they are learned as common mechanism when a new control policy is acquired. Participants were trained to reach to two lateral and one central target in an environment with mirror (left-right)-reversed visual feedback. One group was allowed to make online movement corrections, whereas the other group only received visual information after the end of the movement. Learning of feedforward control was assessed by measuring the accuracy of the initial movement direction to lateral targets. Feedback control was measured in the responses to sudden visual perturbations of the cursor when reaching to the central target. Although feedforward control improved in both groups, it was significantly better when online corrections were not allowed. In contrast, feedback control only adaptively changed in participants who received online feedback and remained unchanged in the group without online corrections. Our findings suggest that when a new control policy is acquired, feedforward and feedback control are learned separately, and that there may be a trade-off in learning between feedback and feedforward controllers.

Original languageEnglish
Pages (from-to)2187-2193
Number of pages7
JournalJournal of Neurophysiology
Volume114
Issue number4
DOIs
Publication statusPublished - 2015 Oct 9

Fingerprint

Learning
Sensory Feedback
Formative Feedback
Direction compound

Keywords

  • Arm-reaching
  • Feedback control
  • Feedforward control
  • Online correction
  • Visuomotor transformation

ASJC Scopus subject areas

  • Physiology
  • Neuroscience(all)

Cite this

Learning feedback and feedforward control in a mirror-reversed visual environment. / Kasuga, Shoko; Telgen, Sebastian; Ushiba, Junichi; Nozaki, Daichi; Diedrichsen, Jörn.

In: Journal of Neurophysiology, Vol. 114, No. 4, 09.10.2015, p. 2187-2193.

Research output: Contribution to journalArticle

Kasuga, Shoko ; Telgen, Sebastian ; Ushiba, Junichi ; Nozaki, Daichi ; Diedrichsen, Jörn. / Learning feedback and feedforward control in a mirror-reversed visual environment. In: Journal of Neurophysiology. 2015 ; Vol. 114, No. 4. pp. 2187-2193.
@article{bbd39ef4faa247ab978bdadb95a96ec2,
title = "Learning feedback and feedforward control in a mirror-reversed visual environment",
abstract = "When we learn a novel task, the motor system needs to acquire both feedforward and feedback control. Currently, little is known about how the learning of these two mechanisms relate to each other. In the present study, we tested whether feedforward and feedback control need to be learned separately, or whether they are learned as common mechanism when a new control policy is acquired. Participants were trained to reach to two lateral and one central target in an environment with mirror (left-right)-reversed visual feedback. One group was allowed to make online movement corrections, whereas the other group only received visual information after the end of the movement. Learning of feedforward control was assessed by measuring the accuracy of the initial movement direction to lateral targets. Feedback control was measured in the responses to sudden visual perturbations of the cursor when reaching to the central target. Although feedforward control improved in both groups, it was significantly better when online corrections were not allowed. In contrast, feedback control only adaptively changed in participants who received online feedback and remained unchanged in the group without online corrections. Our findings suggest that when a new control policy is acquired, feedforward and feedback control are learned separately, and that there may be a trade-off in learning between feedback and feedforward controllers.",
keywords = "Arm-reaching, Feedback control, Feedforward control, Online correction, Visuomotor transformation",
author = "Shoko Kasuga and Sebastian Telgen and Junichi Ushiba and Daichi Nozaki and J{\"o}rn Diedrichsen",
year = "2015",
month = "10",
day = "9",
doi = "10.1152/jn.00096.2015",
language = "English",
volume = "114",
pages = "2187--2193",
journal = "Journal of Neurophysiology",
issn = "0022-3077",
publisher = "American Physiological Society",
number = "4",

}

TY - JOUR

T1 - Learning feedback and feedforward control in a mirror-reversed visual environment

AU - Kasuga, Shoko

AU - Telgen, Sebastian

AU - Ushiba, Junichi

AU - Nozaki, Daichi

AU - Diedrichsen, Jörn

PY - 2015/10/9

Y1 - 2015/10/9

N2 - When we learn a novel task, the motor system needs to acquire both feedforward and feedback control. Currently, little is known about how the learning of these two mechanisms relate to each other. In the present study, we tested whether feedforward and feedback control need to be learned separately, or whether they are learned as common mechanism when a new control policy is acquired. Participants were trained to reach to two lateral and one central target in an environment with mirror (left-right)-reversed visual feedback. One group was allowed to make online movement corrections, whereas the other group only received visual information after the end of the movement. Learning of feedforward control was assessed by measuring the accuracy of the initial movement direction to lateral targets. Feedback control was measured in the responses to sudden visual perturbations of the cursor when reaching to the central target. Although feedforward control improved in both groups, it was significantly better when online corrections were not allowed. In contrast, feedback control only adaptively changed in participants who received online feedback and remained unchanged in the group without online corrections. Our findings suggest that when a new control policy is acquired, feedforward and feedback control are learned separately, and that there may be a trade-off in learning between feedback and feedforward controllers.

AB - When we learn a novel task, the motor system needs to acquire both feedforward and feedback control. Currently, little is known about how the learning of these two mechanisms relate to each other. In the present study, we tested whether feedforward and feedback control need to be learned separately, or whether they are learned as common mechanism when a new control policy is acquired. Participants were trained to reach to two lateral and one central target in an environment with mirror (left-right)-reversed visual feedback. One group was allowed to make online movement corrections, whereas the other group only received visual information after the end of the movement. Learning of feedforward control was assessed by measuring the accuracy of the initial movement direction to lateral targets. Feedback control was measured in the responses to sudden visual perturbations of the cursor when reaching to the central target. Although feedforward control improved in both groups, it was significantly better when online corrections were not allowed. In contrast, feedback control only adaptively changed in participants who received online feedback and remained unchanged in the group without online corrections. Our findings suggest that when a new control policy is acquired, feedforward and feedback control are learned separately, and that there may be a trade-off in learning between feedback and feedforward controllers.

KW - Arm-reaching

KW - Feedback control

KW - Feedforward control

KW - Online correction

KW - Visuomotor transformation

UR - http://www.scopus.com/inward/record.url?scp=84944029828&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84944029828&partnerID=8YFLogxK

U2 - 10.1152/jn.00096.2015

DO - 10.1152/jn.00096.2015

M3 - Article

VL - 114

SP - 2187

EP - 2193

JO - Journal of Neurophysiology

JF - Journal of Neurophysiology

SN - 0022-3077

IS - 4

ER -