TY - JOUR
T1 - Activities of superior pharyngeal constrictor and levator veil palatini muscles related to respiration in dogs
AU - Kogo, Mikihiko
AU - Tanaka, Susumu
AU - Ishii, Shouichiro
AU - Hamaguchi, Munehiro
AU - Iida, Seiji
AU - Matsuya, Tokuzo
PY - 1997/7/1
Y1 - 1997/7/1
N2 - Objective: This study, using mongrel dogs, attempted to delineate the respiratory activity of two closure muscles of the velopharynx, the levator veil palatini (LVP) and superior pharyngeal constrictor (PC) muscles. Method: Fifteen mongrel dogs were given tracheotomies, with intratracheal tubes being connected to their respiratory circuits. Activities of the PC and LVP muscles were recorded electromyographically, and the effects of Pao2 and Paco2 were analyzed along with the effects of lung inflation intratracheally with O2 and N2. Results: Under hypoxic conditions, expiratory LVP activity was observed while PC activity diminished. The effects of lung inflation on both LVP and PC activities were also studied. The activities of both muscles were enhanced by lung inflation. Conclusion: It was thus suggested that the roles of both muscles during velopharyngeal closing movements are not the same.
AB - Objective: This study, using mongrel dogs, attempted to delineate the respiratory activity of two closure muscles of the velopharynx, the levator veil palatini (LVP) and superior pharyngeal constrictor (PC) muscles. Method: Fifteen mongrel dogs were given tracheotomies, with intratracheal tubes being connected to their respiratory circuits. Activities of the PC and LVP muscles were recorded electromyographically, and the effects of Pao2 and Paco2 were analyzed along with the effects of lung inflation intratracheally with O2 and N2. Results: Under hypoxic conditions, expiratory LVP activity was observed while PC activity diminished. The effects of lung inflation on both LVP and PC activities were also studied. The activities of both muscles were enhanced by lung inflation. Conclusion: It was thus suggested that the roles of both muscles during velopharyngeal closing movements are not the same.
KW - Levator veil palatini muscle
KW - Palate
KW - Pharyngeal constrictor
KW - Velopharyngeal closure
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U2 - 10.1597/1545-1569(1997)034<0337:AOSPCA>2.3.CO;2
DO - 10.1597/1545-1569(1997)034<0337:AOSPCA>2.3.CO;2
M3 - Article
C2 - 9257025
AN - SCOPUS:0030750113
SN - 1055-6656
VL - 34
SP - 338
EP - 341
JO - Cleft Palate-Craniofacial Journal
JF - Cleft Palate-Craniofacial Journal
IS - 4
ER -