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Phase synchronization of foot dynamics in quiet standing
1Department of Kinesiology, The Pennsylvania State University, University Park, PA 16802, USA. zxw117@psu.edu
Neuroscience Letters
|December 14, 2011
Summary
Different stances alter foot coordination during posture control. Staggered and tandem stances show longer synchronization between the rear foot and center of pressure (COP) than side-by-side stances.
Area of Science:
- Biomechanics
- Human Movement Science
- Motor Control
Background:
- Postural control relies on complex sensorimotor integration.
- Understanding foot dynamics and coordination is crucial for analyzing balance.
Purpose of the Study:
- To investigate how mechanical constraints from different postural stances affect phase synchronization of foot dynamics.
- To examine the relationship between foot dynamics and the center of pressure (COP) network dynamics.
Main Methods:
- Analysis of phase synchronization (number and duration of epochs) between individual feet' COPs and the COP network.
- Comparison of synchronization patterns across side-by-side, staggered, and tandem stances.
- Evaluation of time-evolutionary properties of feet coupling dynamics.
Main Results:
- Postural stance significantly influences phase synchronization between feet COPs and the COP network.
- Side-by-side stance exhibited longer anterior-posterior (AP) and shorter medial-lateral (ML) synchronization durations compared to staggered and tandem stances.
- In staggered and tandem postures, the rear foot COP showed greater phase synchronization with the COP network than other foot-to-COP relationships.
Conclusions:
- Postural stance is a key factor modulating foot coordination and phase synchronization.
- The findings suggest a 'stable yet flexible' control strategy in the postural system, influenced by asymmetrical foot loading.
