Determination of a palatal lift prosthesis to decrease levator muscle fatigue.

目的：本研究进行澄清的关键因素，在建设过程中的语音装置，以减少肌肉疲劳，防止扬声器执行连续speech.Methods和Subjects：1998年：实验语音器具与可变部分的腭提升假体构建。在言语任务过程中，记录每种类型的实验语音矫治器被删除和插入时，腭帆提肌的肌电图。1998年的研究选择了5名正常人作为研究对象。1999年：每个受试者被指示执行200个/pu/的生产时，相应的语音器具插入和删除。在每个实验条件下，记录提肛肌肌电图。本文应用快速傅立叶变换（FFT）计算平均功率频率（MPF），以探讨：1）语言矫治器是否能减轻肌疲劳; 2）腭部提升假体的哪一部分能最有效地减轻肌疲劳。 关于我们 结果：1）与改变矫治器宽度的情况相比，改变实验性腭提升修复体的软腭部分的长度和角度，对语音的咽后功能储备能力的变化更大，其被定义为在语音任务期间提肌活动与可能的最大活动之间的差异活动。也就是说，当软腭被抬高到腭平面的水平时，储备能力可能比任何其他垂直位置都大。2)对于正常的扬声器，在200个连续生产的/pu/语音矫治器，以减少提上睑肌疲劳的效果是没有不同的放置和删除条件。另一方面，在腭裂患者的情况下，与腭咽功能不全，受试者，谁表现出更大的增加储备能力的讲话与安置，表现出更大的减少肌肉疲劳。结论：这里得到的结果可以表明，腭提升假体，可以提高软腭腭的水平腭平面可以最有效地减少肌肉疲劳，这可能使扬声器进行连续的语音生产没有崩溃的腭咽功能。效果可能是更显着的扬声器，为减少所需的提肌活动是显着的与装置的位置。少

Purpose : This research was conducted to clarify crucial factors in construction procedure of a speech appliance to decrease muscle fatigue, which prevent speakers from performing continuous speech.Methods and Subjects : 1998 : Experimental speech appliances with variable portion of a palatal lift prosthesis were constructed. Electromyography of the levator veli palatini muscle during speech tasks was recorded when each type of experimental speech appliances was removed and inserted. Five normal speakers were selected as subject in the study of 1998. 1999 : Each subjects was instructed to perform 200 productions of/pu/when respective speech appliances were inserted and removed. In each experimental condition, levator EMG was recorded. Mean power frequency (MPF) were calculated on the basis of Fast Fourier Transfer (FFT) so as to examine 1) whether s speech appliance can decrease the muscle fatigue, 2) what type of a portion of a palatal lift prosthesis can decrease most effectively.Res … More ults : 1) Change in reserve capacity for velopharyngeal function for speech, which is defined as differential activity between levator activity during speech tasks and possible maximum activity, was greater in association with alteration of length and angle of a velum portion of an experimental palatal lift prosthesis than the condition of alteration of width of the appliances. That is, when the velum is elevated up to the level of the palatal plane, reserve capacity could become greater than any other vertical positions. 2) For normal speakers, the effect of a speech appliance to decrease levator muscle fatigue during 200 continuous productions of/pu/was not different between placement and removal conditions. On the other hand, in case of speakers with cleft palate with velopharyngeal incompetence, subjects, who showed greater increase in reserve capacity for speech in association with placement, exhibited greater decrease in muscle fatigue. Conclusion : The results obtained here can suggest that a palatal lift prosthesis which can elevate the velum up to the level of the palatal plane could decrease muscle fatigue most effectively, which might enable speakers to perform continuous speech production without collapse in velopharyngeal function. The effect might be more remarkable in speakers, for whom decrease in required levator muscle activity is marked in association with placement of the appliance. Less