A Dynamic Magnetic Resonance Imaging-Based Method to Examine In Vivo Levator Veli Palatini Muscle Function During Speech.
A Dynamic Magnetic Resonance Imaging-Based Method to Examine In Vivo Levator Veli Palatini Muscle Function During Speech.
复制标题
一种基于动态磁共振成像的方法来检查言语过程中体内提肌帆帕拉蒂尼肌肉功能。
DOI：
10.1044/2019_jslhr-s-18-0459
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Blemker,SilviaS
中科院分区：
文献类型：
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作者：
Pelland,CatherineM;Feng,Xue;Borowitz,KathleenC;Meyer,CraigH;Blemker,SilviaS
PurposeThe本研究的目的是开发一种方法，能够量化腭帆提肌（LVP）肌肉缩短和收缩速度，使用动态磁共振成像（MRI）在整个语音samples.MethodSix健康成人（3男3女，M= 24.5岁）产生的音节代表4种不同的生产方式在实时动态MRI扫描。我们采集了一个咽部机制的冠状位切片，它捕获了LVP的长度，并手动分割了每一帧。LVP缩短和肌肉速度计算从所获得的images.ResultsUsing我们的方法，我们发现，受试者表现出更大的LVP缩短和更高的最大收缩速度在摩擦音和爆破音音节生产比在鼻或元音音节生产。LVP缩短和最大收缩速度呈正相关，与diapharyngeal端口depth.ConclusionsIn体内LVP功能不同的生产方式，正如预期的那样，和一个人的diapharyngeal端口尺寸影响LVP功能。这些措施，与力-长度和力-速度肌肉的关系，提供了新的见解LVP功能。未来的研究可以使用这种方法来调查LVP功能在健康的扬声器和个人与下咽功能障碍，以及如何功能与下咽解剖。
PurposeThe aim of this study was to develop a method able to quantify levator veli palatini (LVP) muscle shortening and contraction velocities using dynamic magnetic resonance imaging (MRI) throughout speech samples and relate these measurements to velopharyngeal portal dimensions.MethodSix healthy adults (3 men and 3 women,M= 24.5 years) produced syllables representing 4 different manners of production during real-time dynamic MRI scans. We acquired an oblique-coronal slice of the velopharyngeal mechanism, which captured the length of the LVP, and manually segmented each frame. LVP shortening and muscle velocities were calculated from the acquired images.ResultsUsing our method, we found that subjects demonstrated greater LVP shortening and higher maximum contraction velocities during fricative and plosive syllable production than during nasal or vowel syllable production. LVP shortening and maximum contraction velocity positively correlated with velopharyngeal port depth.ConclusionsIn vivo LVP function differs between manners of production, as expected, and an individual's velopharyngeal portal dimensions influence LVP function. These measures, contextualized with the force–length and force–velocity muscle relationships, provide new insight into LVP function. Future studies could use this method to investigate LVP function in healthy speakers and individuals with velopharyngeal dysfunction and how function relates to velopharyngeal anatomy.