Implicit advance knowledge effects on the interplay between arm movements and postural adjustments in catching

Pieter Tijtgat*, Jos Vanrenterghem, Simon J. Bennett, Dirk De Clercq, Geert J P Savelsbergh, Matthieu Lenoir

*Corresponding author for this work

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    This study examined if, and how, implicit advance knowledge of upcoming ball speed influences the interplay between arm movements and concomitant postural adjustments in one-handed catching. While standing, subjects were asked to catch balls that were presented with or without implicit advance knowledge of four different ball speeds. Full body kinematics and ground reaction forces were measured, which allowed the assessment of arm movements and postural adjustments through the momentum of the arm, rest of the body and whole body. Providing implicit advance knowledge induced a forward arm raising movement scaled to ball speed in the initial transport phase. However, the accompanying backward postural adjustments were unaffected, which is suggestive of a passive control mechanism. In the subsequent grasping phase, the scaling of arm raising movement exhibited in the presence of implicit advance knowledge resulted in a reduced need for postural adjustments, particularly at the highest ball speed. Together, these findings suggest that cortical involvement based on previous experience not only shapes the arm movements but also the subsequent interplaying postural responses.

    Original languageEnglish
    Pages (from-to)117-121
    Number of pages5
    JournalNeuroscience Letters
    Volume518
    Issue number2
    DOIs
    Publication statusPublished - 19 Jun 2012

    Keywords

    • Advance knowledge
    • Arm movements
    • Blocked- versus random-order
    • Catching
    • Postural adjustments

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