Ultrasound-Derived Features of Muscle Architecture Provide Unique Temporal Characterization of Volitional Knee Motion
Ultrasound-Derived Features of Muscle Architecture Provide Unique Temporal Characterization of Volitional Knee Motion
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DOI：
10.1109/embc46164.2021.9630650
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Kaitlin G. Rabe;M. H. Jahanandish;Nicholas P. Fey
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文献类型：
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作者：
Kaitlin G. Rabe;M. H. Jahanandish;Nicholas P. Fey
超声心动图，或骨骼肌的动态超声成像，在康复医学中获得了显著的兴趣。以前，已经建立了肌肉收缩的声学特征，包括肌肉厚度、笔触角度、腱膜与肌束长度之间的角度，与肌肉力量产生、力量和关节运动之间的相关性。此外，灰度图像强度或回声强度与肌肉最大自主等距收缩之间的关系也已被注意到。然而，在意志运动过程中，各种声纳图特征变化之间的时间关系还有待探索，这将突出表明是否可以从这种实时成像方式中获得有关肌肉收缩和运动的独特信息。这些新的见解可以告诉我们如何评估肌肉功能和/或如何使用这种方式进行辅助装置控制。因此，我们的目的是表征从超声图像中提取的股骨直肌收缩的五个特征变化的时间同步性。当身体健全的受试者完成自主膝关节伸展和屈曲的坐式试验时，对手持式超声系统记录的数据进行交叉相关分析。肌肉厚度、腱膜之间的角度和平均图像回声性的变化，灰度图像亮度的变化，在我们对笔触角度和腱束长度的估计发生变化之前。这些特征的主要性质表明，它们可能是早期检测即将发生的关节运动的客观特征。最后，多种声压特征提供了与这一意志任务相关的独特时间信息。临床相关性：本研究评估了意志运动中骨骼肌结构的五个常见特征之间的时间关系，可用于有针对性的临床评估和意图检测。
Sonomyography, or dynamic ultrasound imaging of skeletal muscle, has gained significant interest in rehabilitation medicine. Previously, correlations relating sonomyography features of muscle contraction, including muscle thickness, pennation angle, angle between aponeuroses and fascicle length, to muscle force production, strength and joint motion have been established. Additionally, relationships between grayscale image intensity, or echogenicity, with maximum voluntary isometric contraction of muscle have been noted. However, the time relationship between changes in various sonomyography features during volitional motion has yet to be explored, which would highlight if unique information pertaining to muscle contraction and motion can be obtained from this real-time imaging modality. These new insights could inform how we assess muscle function and/or how we use this modality for assistive device control. Thus, our objective was to characterize the time synchronization of changes in five features of rectus femoris contraction extracted from ultrasound images during seated knee extension and flexion. A cross-correlation analysis was performed on data recorded by a handheld ultrasound system as able-bodied subjects completed seated trials of volitional knee extension and flexion. Changes in muscle thickness, angle between aponeuroses, and mean image echogenicity, a change in brightness of the grayscale image, preceded changes in our estimates of pennation angle and fascicle length. The leading nature of these features suggest they could be objective features for early detection of impending joint motion. Finally, multiple sonomyographic features provided unique temporal information associated with this volitional task.Clinical Relevance—This work evaluates the time relationship between five commonly reported features of skeletal muscle architecture during volitional motion, which can be used for targeted clinical assessments and intent detection.