Effect of airway control by glottal structures on postural stability

Massery, M., Hagins, M., Stafford, R., Moerchen, V. and Hodges, P. W. (2013) Effect of airway control by glottal structures on postural stability. Journal of Applied Physiology, 115 4: 483-490. doi:10.1152/japplphysiol.01226.2012

Author Massery, M.
Hagins, M.
Stafford, R.
Moerchen, V.
Hodges, P. W.
Title Effect of airway control by glottal structures on postural stability
Journal name Journal of Applied Physiology   Check publisher's open access policy
ISSN 8750-7587
Publication date 2013-08-15
Year available 2013
Sub-type Article (original research)
DOI 10.1152/japplphysiol.01226.2012
Open Access Status DOI
Volume 115
Issue 4
Start page 483
End page 490
Total pages 8
Place of publication Bethesda, MD, United States
Publisher American Physiological Society
Collection year 2014
Language eng
Formatted abstract
Maintenance of upright posture involves complex neuromotor processes that include control of thoracic and abdominal pressures. Control of airflow by glottal structures is a primary determinant of thoracic pressure and may have a role in control of postural stability. This study aimed to investigate the effect of modulation of airway control on upright postural stability during postural perturbations. Standing balance was gently perturbed in the sagittal plane during 7 breathing/voicing tasks that ranged from completely closed (breath-hold), to partially opened (voicing) or completely open (sigh) glottal conditions in 11 healthy adults. Dependent measures were peak amplitude of displacement of the thorax and center of pressure (CoP). When the glottis was completely open during sigh, thoracic displacement in response to the perturbation was greater than in all other conditions, regardless of direction of perturbation (post hoc, all P < 0.002). The absolute amplitude of CoP displacement was greater with backward perturbation (main effect, Direction P = 0.001) and was greater at both extremes of glottal modulation (glottis closed and completely open) than when the glottis was partially opened during counting out loud (post hoc, all P < 0.04). These results show that airway modulation affects postural control during upright perturbations. The thorax was more stable when the glottis was engaged than when it was required to remain open, whereas control of CoP displacement appeared more optimal during the natural dynamic mid-range airway modulation of voicing. These data suggest that glottal control influences balance, and that glottal control strategies may be an important consideration for patients with breathing and/or balance disorders.
Keyword Postural control
Balance reactions
Thoracic pressure
Pelvic Floor Muscles
Intraabdominal Pressure
Breath Control
Respiratory Activation
Transversus Abdominis
Trunk Stiffness
Human Diaphragm
Lifting Tasks
Motor Control
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes First published June 13, 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Health and Rehabilitation Sciences Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 4 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 15 Sep 2013, 00:09:52 EST by System User on behalf of School of Health & Rehabilitation Sciences