Effect of Placement of a Speech Appliance on Levator Veli Palatini Muscle Activity during Blowing
Effect of Placement of a Speech Appliance on Levator Veli Palatini Muscle Activity during Blowing
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吹气时语音器具的放置对提肌 Veli Palatini 肌肉活动的影响
DOI：
10.1597/1545-1569_1999_036_0224_eopoas_2.3.co_2
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
T. Wada
中科院分区：
文献类型：
--
作者：
T. Tachimura;K. Nohara;H. Hara;T. Wada
目的临床上观察到部分佩戴语音矫治器矫正腭咽闭合功能不全的说话者，可在不发生鼻气逸出的情况下进行不同强度的吹气。这一临床发现表明，闭合闭合的紧密性可以根据吹气时的口腔气压进行调节。这项肌电研究的目的是(1)检查在吹气时，当移除语音矫治器时，腭帆提肌的活动是否会随着口腔气压的变化而改变，(2)澄清这种变化是否与腭咽闭合不全的严重程度有关，以及(3)检查放置语音矫治器是否可以将吹气时的腭帆提肌活动改变为相当于正常说话者的肌肉活动。设计8例腭裂修复术患者，常规佩戴腭部提升假体(PLP)或咽球腭部提升混合式语音矫治器(BUB-PLP)作为研究对象。受试者根据言语矫治器分为两组(PLP组和BUB-PLP组)。当受试者在三种不同的努力水平下通过管子吹气时，在放置语音装置的情况下记录下腭帆提肌的肌电记录，然后在移除语音装置的情况下进行记录。结果在摘除条件下，球囊PLP组的提肌活动与口腔气压的变化是不同的，而PLP组的所有受试者的提肌活动与口腔气压的变化有关。然而，无论他们的言语矫治器类型如何，无论他们的言语矫治器类型如何，提肌活动都会随着口腔空气压力的变化而变化。结论腭咽闭合不全的严重程度可能与口腔气压引起的提肌活动改变有关。语音矫治器矫正腭咽闭合不全的效果可能不仅包括对腭咽的机械封闭，而且还包括改变腭咽功能，使其变得与正常说话者相似。此外，可以很好地调节腭咽闭合系统，从而显示出一致的腭咽闭合功能结果。
Objective We have observed clinically that some speakers wearing a speech appliance for correction of velopharyngeal incompetence can blow with variable intensity without nasal air escape. This clinical finding suggests that tightness of velopharyngeal closure may be regulated in accordance with oral air pressure during blowing. The purposes of this electromyographic study were (1) to examine whether levator veli palatini muscle activity can be changed in relation to oral air pressure during blowing when the speech appliance is removed, (2) to clarify whether or not the change is related to the severity of velopharyngeal incompetence, and (3) to examine whether placement of a speech appliance can alter levator muscle activity into the equivalent of that of normal speakers during blowing. Design Eight patients with repaired cleft palate, who routinely wear a palatal lift prosthesis (PLP) or a hybrid speech appliance of a pharyngeal bulb and palatal lift (bulb-PLP), served as subjects. Subjects were classified into one of two groups according to their speech appliance (PLP group and bulb-PLP group). Electromyography of the levator veli palatini muscle was recorded with a speech appliance in place and then with the speech appliance removed as the subject blew through a tube at three different effort levels. Results In the removed condition, the change in levator activity in relation to oral air pressure was variable across subjects in the bulb-PLP group, whereas levator activity changed in relation to oral air pressure change for all subjects in the PLP group. However, levator activity changed in relation to oral air pressure with either speech appliance in place for all subjects irrespective of their speech appliance types. Conclusion The severity of velopharyngeal incompetence might be related in part to change in levator activity in association with oral air pressure. The effect of a speech appliance to correct velopharyngeal incompetence might consist not only of mechanical obturation of the velopharynx but also of alteration of velopharyngeal function to become similar to normal speakers. Moreover, it is likely that the velopharyngeal system could be well regulated so as to exhibit a consistent outcome of velopharyngeal function.