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Origins of timing errors in human sensorimotor coordination.

Y Chen1, M Ding, J A Kelso

  • 1Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton, FL 33431-0991, USA.

Journal of Motor Behavior
|March 27, 2001
PubMed
Summary

Human movement coordination with rhythmic signals shows long memory processes in timing errors. These timing errors, characterized by 1/f(alpha) dynamics, suggest higher cortical origin and distributed neural processes.

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Area of Science:

  • Neuroscience
  • Human Motor Control
  • Cognitive Science

Background:

  • Movement coordination with external rhythms is typically modeled using simple, self-correcting mechanisms.
  • Temporal dynamics of timing errors in such tasks have not been fully characterized.

Purpose of the Study:

  • To analyze timing error fluctuations during human movement coordination with rhythmic signals.
  • To investigate the underlying processes generating these timing errors.

Main Methods:

  • Analysis of timing error data from 8 human participants coordinating movement with external rhythmic signals.
  • Characterization of temporal dynamics using a 1/f(alpha) long memory process model.

Main Results:

  • Timing errors exhibit a 1/f(alpha) long memory process, deviating from simple self-correcting models.

Related Experiment Videos

  • The exponent alpha distinguishes between synchronization and syncopation coordination states.
  • The exponent alpha is modifiable by participants' coordination strategies.

    • Conclusions:

    • Long-range correlated timing errors in movement coordination are likely of higher cortical origin.
    • These errors may result from distributed neural processes operating across multiple timescales.