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Determining movement onsets from temporal series.

N Teasdale1, C Bard, M Fleury

  • 1Université Laval, Départment d'éducation Physique, PEPS, Laboratoire de Performance Motrice Humaine, Sainte-Foy, Québec G1K 7P4, Canada. 35019110@vml.ulaval.ca

Journal of Motor Behavior
|June 1, 1993
PubMed
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Movement onset determination is affected by response dynamics, impacting kinematic and kinetic measures. Initial signal changes can alter movement onset, requiring caution with latency measurements.

Area of Science:

  • Biomechanics
  • Motor Control
  • Human Movement Analysis

Background:

  • Kinematic and kinetic measures are vital for analyzing events over time.
  • Temporal series analysis often infers central and peripheral control processes.
  • Movement onset is a critical temporal marker, often arbitrarily defined.

Purpose of the Study:

  • To investigate how response dynamics, specifically average movement velocity, influence movement onset determination.
  • To evaluate interactive graphics and numerical methods for identifying movement onset from temporal series.
  • To assess the impact of variations in the initial rate of change on movement onset detection.

Main Methods:

  • Analysis of various kinematic signals using interactive graphics.
  • Application of numerical methods for determining movement onset.

Related Experiment Videos

  • Evaluation of the effect of initial signal rate of change on onset determination.

    • Main Results:

    • Response dynamics significantly affect the determination of movement onset.
    • Variations in the initial rate of change in kinematic signals alter onset detection.
    • Current methods for determining movement onset may introduce artifacts.

    Conclusions:

    • Measurements of component latency derived from temporal series should be interpreted with caution.
    • Artifacts in movement onset determination can arise from response dynamics.
    • Procedures to minimize these artifacts are necessary for accurate movement analysis.