Intramural mechanics of the human tongue in association with physiological deformations
Intramural mechanics of the human tongue in association with physiological deformations
复制标题
DOI：
10.1016/s0021-9290(98)00109-2
复制
发表时间：
1999-01-01
影响因子：
2.4
通讯作者：
Gilbert, RJ
中科院分区：
文献类型：
--
作者：
Napadow, VJ;Chen, Q;Gilbert, RJ
在说话和吞咽期间舌头肌肉组织的收缩与组织变形的特征模式相关联。为了量化人类舌头的局部变形（应变），我们使用了非侵入性NMR滞后技术，将组织表示为离散变形元素。使用快速梯度回波脉冲序列（TR/TE 2.3/0.8 ms，层厚10 mm，有效空间分辨率1.3 x 1.3 mm）对受试者进行研究。单个元素被定义为选择性过饱和带的磁自旋在休息的舌组织沿前后和上下方向的正中矢状面，导致在一个直线的正方形网格。轴向和剪切应变相对于休息条件下确定每个元素，并表示为二维表面应变图。前伸过程中，舌前部发生正的前后应变（伸长）（最大200%）和对称的负的内外和上下应变（收缩）。在指向硬腭的矢状卷曲过程中，舌表现出正的不对称的前后应变（最大160%），其径向增加作为距曲率中心的距离的函数（r = 0.9216，p < 0.0005），并且在内外方向上表现出相当的负应变。类似地，在向左卷曲舌期间的前后应变的大小与到弯曲内表面的距离成比例（r = 0.8978，p < 0.0005）。我们的结论是，调节舌的位置所研究的议案有关的区域激活的内在舌肌。(C)1999爱思唯尔科技有限公司。保留所有权利。
Contraction of the tongue musculature during speech and swallowing is associated with characteristic patterns of tissue deformation. In order to quantify local deformation (strain) in the human tongue, we used a non-invasive NMR lagging technique that represents tissue as discrete deforming elements. Subjects were studied with a fast gradient echo pulse sequence (TR/TE 2.3/0.8 ms, slice thickness 10 mm, and effective spatial resolution 1.3 x 1.3 mm). Individual elements were defined by selectively supersaturating bands of magnetic spins in resting tongue tissue along the antero-posterior and superior-inferior directions of the mid-sagittal plane, resulting in a rectilinear square grid. Axial and shear strains relative to the rest condition were determined for each element and represented by two-dimensional surface strain maps. During forward protrusion, the anterior tongue underwent positive antero-posterior strain (elongation) (maximum 200%) and symmetrical negative medial-lateral and superior-inferior strain (contraction). During sagittal curl directed to the hard palate, the tongue exhibited positive asymmetrical antero-posterior strain (maximum 160%) that increased radially as a function of distance from the center of curvature (r = 0.9216, p < 0.0005), and commensurate negative strain in the medial-lateral direction. Similarly, the magnitude of anterior-posterior strain during left-directed tongue curl was proportional to the distance from the curved inner surface (r = 0.8978, p < 0.0005). We conclude that the regulation of tongue position for the motions studied was related to regional activation of the intrinsic lingual musculature. (C) 1999 Elsevier Science Ltd. All rights reserved.