Department of Rehabilitation Medicine, Hiroshima University Hospital, Hiroshima, Japan.
Department of Clinical Neuroscience and Therapeutics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.
J Oral Rehabil. 2024 Sep;51(9):1872-1880. doi: 10.1111/joor.13737. Epub 2024 May 12.
High-density surface electromyography (HD-sEMG) has enabled non-invasive analysis of motor unit (MU) activity and recruitment, but its application to swallowing-related muscles is limited.
We aimed to investigate the utility of HD-sEMG for quantitatively evaluating the MU recruitment characteristics of the suprahyoid muscles during tongue elevation.
We measured the sEMG activity of the suprahyoid muscles of healthy participants during tongue elevation using HD-sEMG. Maximum voluntary contraction (MVC) was measured, followed by data collection during sustained and ramp-up tasks to capture suprahyoid muscle activity. Changes in the temporal/spatial MU recruitment patterns within individual suprahyoid muscles were analysed.
This study enrolled 16 healthy young adults (mean age: 27.8 ± 5.3 years; eight males and eight females). Increasing muscle force corresponded to a decrease in modified entropy and correlation coefficient and an increase in the coefficient of variation. No significant differences were observed between male and female participants.
The results of this study, consistent with those observed in other muscles, such as the vastus lateralis muscle, suggest that HD-sEMG is a valuable and reliable tool for quantitatively evaluating MU recruitment in the suprahyoid muscles. This measurement technique holds promise for novel assessments of swallowing function.
高密度表面肌电图（HD-sEMG）可实现对运动单位（MU）活动和募集的非侵入性分析，但在吞咽相关肌肉中的应用受到限制。
我们旨在研究 HD-sEMG 在定量评估舌上抬时舌骨上肌群 MU 募集特征中的效用。
我们使用 HD-sEMG 测量了健康参与者在舌上抬期间舌骨上肌群的 sEMG 活动。测量了最大自主收缩（MVC），然后在持续和斜坡上升任务期间采集数据以捕获舌骨上肌群的活动。分析了个体舌骨上肌群内 MU 募集模式的时-空变化。
本研究纳入了 16 名健康的年轻成年人（平均年龄：27.8±5.3 岁；男性 8 名，女性 8 名）。肌肉力量的增加与修正熵和相关系数的降低以及变异系数的增加相对应。男性和女性参与者之间未观察到显著差异。
与其他肌肉（如股外侧肌）的观察结果一致，本研究结果表明，HD-sEMG 是定量评估舌骨上肌群 MU 募集的一种有价值且可靠的工具。这种测量技术有望为吞咽功能的新评估提供帮助。
