Motor synergies: feedback and error compensation within and between trials

Experimental Brain Research
Rajiv Ranganathan, Karl M Newell

Abstract

The aim of the current study was to examine the influence of visual feedback on compensatory variations in force within and between trials. In Experiment 1, the task was to maintain a constant force of 5 N for 15 s using both index fingers. In Experiment 2, the task was to produce discrete force pulses such that the peak value of the sum of the two finger forces was 5 N. In both experiments, there were three conditions that manipulated the amount of visual feedback of the force trace. Results showed that the within-trial correlations between the finger forces increased when feedback was degraded, indicating that the two fingers were increasingly constrained toward acting as a single unit. Similarly, between-trial correlations showed that the amount of error compensation decreased when feedback was removed, indicating that participants produced a smaller set of goal equivalent solutions. It appears that feedback has a dual role in coordination-removing the constraints on the degrees of freedom within trials, and facilitating the utilization of redundancy between trials. The distinction between these two classes of variation is central to understanding the redundancy problem in motor control.

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Citations

Jun 15, 2011·Experimental Brain Research·Xiaogang Hu, Karl M Newell
Nov 1, 2011·Experimental Brain Research·Shunta TogoYoji Uno
Apr 23, 2013·Experimental Brain Research·Junya Masumoto, Nobuyuki Inui
Jun 6, 2012·Journal of Motor Behavior·Junya Masumoto, Nobuyuki Inui
Jun 23, 2012·Journal of Neurophysiology·Rajiv Ranganathan, Chandramouli Krishnan
Aug 24, 2012·Perceptual and Motor Skills·Torrey M J LoucksJacob J Sosnoff
Sep 20, 2011·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Neha LodhaJames H Cauraugh
Dec 28, 2010·Neuroscience Letters·Xiaogang Hu, Karl M Newell
Dec 2, 2008·Behavioural Brain Research·Pierre-Luc TremblayPierre J Blanchet
Mar 5, 2010·The International Journal of Neuroscience·Chetan P PhadkeCarl G Kukulka
Feb 24, 2015·Neuroscience and Biobehavioral Reviews·Nyeonju Kang, James H Cauraugh
Oct 17, 2015·PloS One·Shunta Togo, Hiroshi Imamizu
May 25, 2012·Journal of Neurophysiology·Tyler CluffRamesh Balasubramaniam
Oct 1, 2011·Journal of Applied Physiology·Xiaogang Hu, Karl M Newell
Mar 2, 2017·Experimental Brain Research·Nyeonju Kang, James H Cauraugh
Feb 25, 2011·Journal of Neurophysiology·Xiaogang Hu, Karl M Newell
Mar 30, 2016·Experimental Brain Research·Stanislaw SolnikMark L Latash
Mar 11, 2016·Experimental Brain Research·Charley W LafeKarl M Newell
Oct 28, 2019·BMC Geriatrics·Nyeonju KangJames H Cauraugh
Dec 12, 2012·Journal of Neurophysiology·Junya Masumoto, Nobuyuki Inui
Apr 24, 2015·Journal of Neurophysiology·Junya Masumoto, Nobuyuki Inui
Sep 18, 2020·Neuroscience Letters·Prakruti Patel, Neha Lodha

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