Effects of respiration on soft palate movement in feeding.
Cyclic soft palate elevation is temporally associated with masticatory jaw movement. However, the soft palate is normally lowered during nasal breathing to maintain retropalatal airway patency. We tested the hypothesis that the frequency and amplitude of soft palate elevation associated with mastication would be reduced during inspiration. Movements of radiopaque soft palate markers were recorded by videofluorography while 11 healthy volunteers ate solid foods. Breathing was monitored with plethysmography. Masticatory sequences were divided into processing and stage II transport cycles (food transport to the oropharynx before swallowing). In food processing, palatal elevation was less frequent and its displacement was smaller during inspiration than expiration. In stage II transport, the soft palate was elevated less frequently during inspiration than expiration. These findings suggest that masticatory soft palate movement is diminished during inspiration. The control of breathing appears to have a significant effect on soft palate elevation in mastication.
Matsuo
K
K
Dept. of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA. kmatsuo@po.mdu.ac.jp
Metani
H
H
Mays
K A
KA
Palmer
J B
JB
D000328:Adult; D001466:Barium Sulfate; D002933:Cineradiography; D003287:Contrast Media; D003679:Deglutition / Q000502:physiology; D004435:Eating / Q000502:physiology*; D045853:Exhalation / Q000502:physiology; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D001239:Inhalation / Q000502:physiology; D008297:Male; D008409:Mastication / Q000502:physiology; D009068:Movement; D009960:Oropharynx / Q000502:physiology; D010160:Palate, Soft / Q000502:physiology*; D010991:Plethysmography; D012123:Pulmonary Ventilation / Q000502:physiology; D012119:Respiration; D012815:Signal Processing, Computer-Assisted; D014059:Tongue / Q000502:physiology; D055815:Young Adult
D003287:Contrast Media; D001466:Barium Sulfate
Am J Phys Anthropol. 1984 Nov;65(3):275-82
6517154
J Appl Physiol (1985). 1995 Feb;78(2):680-8
7759440
Am Rev Respir Dis. 1986 Aug;134(2):311-25
3527007
Eur Respir J. 2000 May;15(5):906-10
10853857
J Dent Res. 2005 Jan;84(1):39-42
15615873
Dysphagia. 1992;7(4):187-200
1308667
J Appl Physiol (1985). 1992 Feb;72(2):779-86
1559958
Dysphagia. 1999 Winter;14(1):31-42
9828272
J Appl Physiol (1985). 2004 Feb;96(2):440-9
14527967
J Appl Physiol Respir Environ Exerc Physiol. 1984 Feb;56(2):500-5
6706761
J Appl Physiol (1985). 1995 Aug;79(2):448-54
7592201
Am J Respir Crit Care Med. 1997 Sep;156(3 Pt 1):867-73
9310006
J Appl Physiol (1985). 1996 Feb;80(2):478-85
8929587
J Physiol. 2001 Apr 15;532(Pt 2):525-34
11306669