Poorjavad Marziyeh, Talebian Saeed, Ansari Noureddin Nakhostin, Soleymani Zahra
Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Department of Physical Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Iran J Med Sci. 2017 Mar;42(2):194-200.
The reliability of surface electromyographic (sEMG) variables during swallowing determines the potential usefulness of these measures in swallowing assessment and treatment. This study aimed to establish the reliability of the sEMG measures of the swallowing function of muscles during different swallowing conditions in healthy young and old volunteers. Two groups of volunteers (24 older adults, 10 younger adults) participated in this cross-sectional study during 2014. The activity of masseter, submental, and infrahyoid groups were measured using sEMG during three repetitions of different swallowing tasks. Both the relative and absolute reliability (characterized respectively by ICC, SEM%, and SRD%) were calculated for the sEMG indices of muscle activity during swallowing events. Statistical analyses were performed by the SPSS 19.0 and Microsoft Excel 2007 software packages. Statistical significance was set at P≤0.05. The relative reliability calculations showed significant agreements between repetitions for the mean and peak amplitude and the average of median frequency (MDF) of the studied muscles function during most swallowing types in both groups. However, the duration and particularly the time to peak of muscle activity showed significant agreements during fewer swallowing conditions. Excluding MDF, we found high SEM% and SRD% for the studied measures (particularly timing measures) of muscles function during most swallowing types in both groups. The reliability of sEMG measures was influenced by the age and swallowing types. Our findings suggest that the MDF of muscle function during almost all studied swallowing types can be a reliable measure for the sEMG assessment of swallowing function in both younger and older adults.
吞咽过程中表面肌电图（sEMG）变量的可靠性决定了这些测量方法在吞咽评估和治疗中的潜在用途。本研究旨在确定健康年轻和老年志愿者在不同吞咽条件下肌肉吞咽功能的sEMG测量的可靠性。两组志愿者（24名老年人，10名年轻人）于2014年参与了这项横断面研究。在不同吞咽任务重复进行三次的过程中，使用sEMG测量咬肌、颏下肌和舌骨下肌群的活动。计算吞咽事件期间肌肉活动的sEMG指标的相对和绝对可靠性（分别以组内相关系数（ICC）、标准误百分比（SEM%）和最小可检测差异百分比（SRD%）为特征）。使用SPSS 19.0和Microsoft Excel 2007软件包进行统计分析。设定统计学显著性为P≤0.05。相对可靠性计算表明，在两组大多数吞咽类型中，所研究肌肉功能的平均和峰值幅度以及中位频率（MDF）平均值在重复测量之间具有显著一致性。然而，在较少的吞咽条件下，肌肉活动的持续时间，特别是达到峰值的时间显示出显著一致性。排除MDF后，我们发现两组在大多数吞咽类型中所研究的肌肉功能测量指标（特别是时间测量指标）具有较高的SEM%和SRD%。sEMG测量的可靠性受年龄和吞咽类型的影响。我们的研究结果表明，在几乎所有研究的吞咽类型中，肌肉功能的MDF都可以作为年轻和老年成年人吞咽功能sEMG评估的可靠指标。
