Induced Velopharyngeal Fatigue Effects in Speakers with Repaired Palatal Clefts
Induced Velopharyngeal Fatigue Effects in Speakers with Repaired Palatal Clefts
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腭裂修复后扬声器的诱发腭咽疲劳效应
DOI：
10.1597/06-098
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Lili Zhao
中科院分区：
文献类型：
--
作者：
J. Moon;D. Kuehn;Grace Chan;Lili Zhao
目的：探讨患有腭裂的说话者是否表现出腭咽机构疲劳，并且比无腭裂的说话者更容易出现肌肉疲劳。方法：六名患有腭裂修复且轻度至中度鼻过度的成年人作为受试者。记录腭咽闭合力和提腭腭肌活动。受试者被要求重复 /si/ 100 次，同时通过面罩向腭咽机构的鼻侧施加由气压（0、5、15、25、35 cm H2O）组成的外部负载。疲劳被定义为整个 /si/ 产品系列中腭咽闭合力的减少，如与闭合力数据拟合的负斜率回归线所证明的。结果：腭咽闭合力的绝对水平远低于之前在无腭裂的说话者中观察到的水平。所有受试者都表现出疲劳的迹象。此外，所有受试者都表现出精疲力尽，他们无法抵抗鼻压力负荷关闭腭咽口。这种情况发生的压力负荷水平低于无腭裂说话者成功完成的压力负荷水平。结论：在腭裂修复的说话者中，腭咽闭合肌可能不具有与正常说话者相同的力量和/或耐力。或者，肌肉可能具有足够的强度，但在腭裂修复后并未在腭咽内处于最佳位置，或者可能被迫移动由于手术疤痕而变得更僵硬的腭咽结构。
Objective: To address whether speakers with cleft palate exhibit velopharyngeal mechanism fatigue and are more susceptible to muscle fatigue than are speakers without cleft palate. Methods: Six adults with repaired palatal clefts and mild-moderate hypernasality served as subjects. Velopharyngeal closure force and levator veli palatini muscle activity were recorded. Subjects were asked to repeat /si/ 100 times while an external load consisting of air pressure (0, 5, 15, 25, 35 cm H2O) was applied via a mask to the nasal side of the velopharyngeal mechanism. Fatigue was defined as a reduction in velopharyngeal closure force across the series of /si/ productions, as evidenced by a negatively sloped regression line fit to the closure force data. Results: Absolute levels of velopharyngeal closure force were much lower than those observed previously in speakers without palatal clefts. All subjects showed evidence of fatigue. Furthermore, all subjects demonstrated exhaustion, where they were unable to close the velopharyngeal port against the nasal pressure load. This occurred at pressure load levels lower than those successfully completed by speakers without cleft palate. Conclusions: In speakers with a repaired palatal cleft, the velopharyngeal closure muscles may not possess the same strength and/or endurance as in normal speakers. Alternatively, muscles may possess adequate strength, but not be positioned optimally within the velopharynx following cleft palate repair or may be forced to move velopharyngeal structures that are stiffer as a result of surgical scarring.
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元音产生过程中腭咽闭合力的测量。
DOI：
10.1597/1545-1569_1994_031_0356_movcfd_2.3.co_2
发表时间：
1994
期刊：
The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association
影响因子：
--
作者：
Moon,JB;Kuehn,DP;Huisman,JJ
通讯作者：
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DOI：
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发表时间：
1982
期刊：
The Cleft palate journal
影响因子：
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作者：
Kuehn,DP;Folkins,JW;Cutting,CB
通讯作者：
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DOI：
10.1044/jshr.3706.1260
发表时间：
1994
期刊：
Journal of speech and hearing research
影响因子：
--
作者：
Kuehn,DP;Moon,JB
通讯作者：
Moon,JB
腭裂受试者的提腭帆肌活动与口内气压变化相关。
DOI：
10.1597/1545-1569_1995_032_0376_lvpmai_2.3.co_2
发表时间：
1995
期刊：
The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association
影响因子：
--
作者：
Kuehn,DP;Moon,JB
通讯作者：
Moon,JB