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Origins of timing errors in human sensorimotor coordination
1Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton, FL 33431-0991, USA.
Journal of Motor Behavior
|March 27, 2001
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.
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.
- 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.