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Experimental Methods to Study Human Postural Control
Published on: September 11, 2019
Short-term effects on postural control can be evidenced using a seesaw
P R Rougier1, M Mathias, A Tanzi
1Laboratoire de Physiologie de l'Exercice, EA4338, Université de Savoie, Domaine Scientifique de Savoie-Technolac, 73376 Le Bourget du Lac cedex, France. patrice.rougier@univ-savoie.fr
Neuroscience Letters
|November 16, 2010
Summary
Short-term training on a seesaw improves postural control by refining the coordination between center-of-gravity (CG) and center-of-pressure (CP) movements. This enhanced control is achieved through reduced body sway and faster corrective responses.
Area of Science:
- Biomechanics
- Motor Control
- Human Physiology
Background:
- Postural control is typically assessed on firm surfaces, relying on long-term training for motor efficiency.
- Seesaw devices disrupt normal postural control by invalidating somesthetic cues and amplifying motor commands, necessitating short-term adaptation.
- Understanding short-term improvements in postural control on unstable surfaces is crucial for rehabilitation and performance enhancement.
Purpose of the Study:
- To investigate the mechanisms underlying short-term improvements in postural control after brief training on a seesaw.
- To quantify changes in center-of-gravity (CG) and center-of-pressure (CP) movements following 20 minutes of seesaw training.
- To analyze the impact of training on movement dynamics using Fractional Brownian Motion (fBm) analysis.
Main Methods:
- Eleven healthy young adults underwent 20 minutes of eyes-closed training on a seesaw.
- Posturographic measurements of CG and CP displacements were recorded before and after training.
- Fractional Brownian Motion (fBm) analysis was employed to characterize movement patterns.
Main Results:
- A significant reduction in anteroposterior horizontal center-of-gravity (CG) displacements was observed.
- Center-of-pressure (CP) to CG displacements decreased in both anteroposterior and mediolateral axes.
- fBm analysis indicated a reduced distance covered before corrective mechanisms engaged, suggesting improved anticipatory control.
Conclusions:
- Short-term training on a seesaw enhances postural control by improving the coordination of CG and CP movements.
- Reduced tonic muscular activity and/or sensory recalibration likely contribute to the observed improvements.
- These findings highlight the adaptability of the human motor system to novel postural challenges.
