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Experimental Methods to Study Human Postural Control
Published on: September 11, 2019
Effect of airway control by glottal structures on postural stability
M Massery1, M Hagins, R Stafford
1Graduate Program in Advanced Neurology Physical Therapy, Rocky Mountain University of Health Professions, Provo, Utah, USA.
Journal of Applied Physiology (Bethesda, Md. : 1985)
|June 15, 2013
Summary
Altering airflow control through the glottis impacts upright postural stability. Engaging the glottis enhances thoracic stability, while voicing optimizes center of pressure control during balance perturbations.
Area of Science:
- Neurology
- Biomechanics
- Respiratory Physiology
Background:
- Upright posture relies on neuromotor control of thoracic and abdominal pressures.
- Glottal airflow regulation is key to thoracic pressure and may influence postural stability.
Purpose of the Study:
- To examine how modulating airway control affects upright postural stability during perturbations.
- Investigate the role of glottal function in maintaining balance.
Main Methods:
- 11 healthy adults stood while their balance was perturbed in the sagittal plane.
- Seven breathing/voicing tasks were performed, varying glottal conditions (closed, partially open, open).
- Measured thoracic displacement and center of pressure (CoP) changes.
Main Results:
- Greater thoracic displacement occurred with a fully open glottis (sigh) compared to other conditions.
- Center of pressure (CoP) displacement was larger with backward perturbations and at glottal extremes (closed/open).
- Thoracic stability was better with engaged glottis; CoP control was optimal during voicing.
Conclusions:
- Airway modulation significantly affects postural control during perturbations.
- Glottal engagement enhances thoracic stability, while voicing optimizes CoP control.
- Glottal control strategies are relevant for individuals with breathing or balance disorders.
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