KINEMATICS OF CHEST WALL DURING SPEECH PRODUCTION - VOLUME DISPLACEMENTS OF RIB CAGE, ABDOMEN, AND LUNG
KINEMATICS OF CHEST WALL DURING SPEECH PRODUCTION - VOLUME DISPLACEMENTS OF RIB CAGE, ABDOMEN, AND LUNG
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DOI：
10.1044/jshr.1601.78
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发表时间：
1973-01-01
期刊：
影响因子：
--
通讯作者：
MEAD, J
中科院分区：
文献类型：
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作者：
HIXON, TJ;GOLDMAN, MD;MEAD, J
胸壁被视为由平行的胸腔和膈肌腹部组成的两部分运动系统，其中每个部分位移的体积与其内点的运动线性相关。通过测量胸腔和腹部前后径的变化，我们研究了在几次呼吸动作和言语任务中处于直立和仰卧姿势的受试者。结果以相对运动图（胸廓与腹部）的形式绘制，其中包括胸壁的放松形态以及说话期间的偏离情况。对于对话、阅读和唱歌，肺容量事件仅限于中等音量范围，并且取决于身体姿势和说话响度。两个部分的相对体积贡献因受试者和话语而异，范围从所有肋骨位移到所有腹部位移。在说话过程中，胸壁从放松的状态开始扭曲，在所研究的两种姿势中情况有所不同。讨论了造成这些扭曲的潜在机制。我们得出的结论是，观察到的扭曲构成了“音量平台”或胸壁的姿势，说话者在其上产生语音，但在提供典型话语所需的驱动压力变化时不会显着进一步扭曲系统。
The chest wall has been treated as a two-part kinematic system comprised of the rib cage and diaphragm-abdomen in parallel, and wherein the volume displaced by each part is linearly related to the motions of points within it. Using measurements of changes in anteroposterior diameters of the rib cage and abdomen, we studied subjects in upright and supine postures during several respiratory maneuvers and utterance tasks. Results are charted in relative motion diagrams (rib cage vs abdomen), which include the relaxed configuration of the chest wall and departures therefrom during utterances. For conversation, reading, and singing, lung volume events were restricted to the midvolume range and were dependent upon body posture and utterance loudness. Relative volume contributions of the two parts differed for subjects and utterances and ranged from all rib cage displacement to all abdominal displacement. During utterances, the chest wall was distorted from its relaxed configuration, and differently so in the two postures studied. Potential mechanisms responsible for these distortions are discussed. We conclude that the distortions observed constitute a “volume platform” or posturing of the chest wall, off of which the speaker produces speech but does not significantly further distort the system in providing the changes in driving pressure required for typical utterances.