Abstract
This study was designed to investigate the significance of bolus types and volumes, delivery methods and swallowing instructions on lung volume at swallowing initiation in normal subjects in a single experiment using a multifactorial approach. Our broad range goal was to determine optimal lung volume range associated with swallowing initiation to provide training targets for dysphagic patients with disordered respiratory-swallow coordination. Our hypothesis was that swallows would be initiated within a limited range of quiet breathing lung volumes regardless of bolus volume, consistency or task. Results confirmed this hypothesis and revealed that swallows were initiated at mean lung volume = 244 ml. Cued swallows were initiated at lower quiet breathing volumes than un-cued swallows (cued = 201 ml; un-cued = 367 ml). Water boluses were initiated at slightly higher quiet breathing volumes than solids. Data suggest that swallows occur within a restricted range of lung volumes with variation due to instructions, bolus type and other experimental variables.
Original language | English (US) |
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Pages (from-to) | 89-96 |
Number of pages | 8 |
Journal | Respiratory Physiology and Neurobiology |
Volume | 234 |
DOIs | |
State | Published - Dec 1 2016 |
Keywords
- Deglutition
- Lung volume
- Respiration
- Respiratory-swallow coordination
ASJC Scopus subject areas
- Neuroscience(all)
- Physiology
- Pulmonary and Respiratory Medicine