International journal of obesity and related metabolic disorders : journal of the International Association for the Study of Obesity · 2000
Muscle fiber area distribution of musculus uvulae in obstructive sleep apnea and non-apneic snorers.
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Sériès F, Simoneau J A, St Pierre S
Аннотация
OBJECTIVE: To determine whether differences exist in the morphology of upper airway muscles between apneic and non-apneic snorers
DESIGN: Muscle characteristic analysis in patients undergoing upper airway surgery in a tertiary sleep center.
SUBJECTS: 10 non-apneic snorers and 10 sleep apnea hypopnea syndrome (SAHS).
MEASUREMENTS: Frequency distribution of musculus uvulae (MU) muscle fiber area determined from 475+/-207 (mean s.d.) and 697 +/- 165 type IIA fibers and 92 +/- 32 and 68 45 type I fibers in snorers and SAHS, respectively.
RESULTS: Histochemical analyses of MU revealed as expected that type IIA fibers occupied a significantly larger area within that muscle in SAHS compared to Snorers (89.4 +/- 5.8% and 76.1 +/- 15.1% respectively, P= 0.01). No difference was found in the frequency distribution of type I and type IIA fiber areas between the two groups comparing the between-groups and within-group variance of individual area distributions found in snorers and SAHS.
CONCLUSION: There is no difference in muscle fiber area frequency distribution between non-apneic snorers and SAHS patients. This suggests that musculus uvulae of these groups of patients does not have a specific prevalence of atrophic or hypertrophic muscle fibers.
DESIGN: Muscle characteristic analysis in patients undergoing upper airway surgery in a tertiary sleep center.
SUBJECTS: 10 non-apneic snorers and 10 sleep apnea hypopnea syndrome (SAHS).
MEASUREMENTS: Frequency distribution of musculus uvulae (MU) muscle fiber area determined from 475+/-207 (mean s.d.) and 697 +/- 165 type IIA fibers and 92 +/- 32 and 68 45 type I fibers in snorers and SAHS, respectively.
RESULTS: Histochemical analyses of MU revealed as expected that type IIA fibers occupied a significantly larger area within that muscle in SAHS compared to Snorers (89.4 +/- 5.8% and 76.1 +/- 15.1% respectively, P= 0.01). No difference was found in the frequency distribution of type I and type IIA fiber areas between the two groups comparing the between-groups and within-group variance of individual area distributions found in snorers and SAHS.
CONCLUSION: There is no difference in muscle fiber area frequency distribution between non-apneic snorers and SAHS patients. This suggests that musculus uvulae of these groups of patients does not have a specific prevalence of atrophic or hypertrophic muscle fibers.