Selective effects of arm proximal and distal muscles fatigue on force coordination in manipulation tasks

Nicholas Emge, Mehmet Uygur, Mandic Radivoj, Thomas W. Kaminski, Todd Royer, Slobodan Jaric

    Research output: Contribution to journalArticlepeer-review

    1 Scopus citations

    Abstract

    Effects of muscle fatigue on force coordination and task performance of various manipulation tasks are explored. Grip force (GF; normal force component acting at the digits-object contact area) and load force (LF; tangential component that lifts and holds objects) were recorded prior to and after fatiguing the distal (DAM; i.e., GF producing) and proximal arm muscles (PAM; LF producing). Results reveal a deterioration of GF scaling (i.e., averaged GF-LF ratio), GF-LF coupling (their correlation), and task performance (ability to exert a prescribed LF pattern) associated with DAM, but not PAM fatigue. Deteriorated force coordination clearly increases the likelihood of dropping an object; however, the observed selective effects of DAM and PAM fatigue represent a novel finding deserving of further research. © 2014

    Original languageEnglish (US)
    Pages (from-to)259-265
    Number of pages7
    JournalJournal of Motor Behavior
    Volume46
    Issue number4
    DOIs
    StatePublished - Jul 4 2014

    All Science Journal Classification (ASJC) codes

    • Biophysics
    • Orthopedics and Sports Medicine
    • Experimental and Cognitive Psychology
    • Cognitive Neuroscience

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