Musto Federica, Rosati Riccardo, Sforza Chiarella, Toma Marilisa, Dellavia Claudia
Department of Biomedical, Surgical and Dental Sciences, Universita' degli Studi di Milano, Milan, Italy.
Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy.
J Electromyogr Kinesiol. 2017 Jun;34:1-5. doi: 10.1016/j.jelekin.2017.02.008. Epub 2017 Feb 24.
The aims of this pilot study were to evaluate: (i) the reproducibility and variability of an electromyographical protocol developed for the assessment of submental muscles (SM) (ii) to apply the new protocol to maximal teeth clenching, a simple and largely studied static task in order to quantify the relative contribution of submental muscles. In 20 healthy subjects, aged 19-35years, surface electromyography of SM, masseter (MM) and anterior temporalis (TA) muscles was performed during maximal voluntary clenching (MVC) with and without cotton rolls and the pushing of the tongue against the palate. Clenching on cotton rolls and pushing the tongue against the palate were used to standardise respectively MM and TA, and SM muscular potentials. The exercises were repeated in two appointments (T1-T2); submental muscles standardisation was also repeated twice (A-B) in each session to assess repeatability. Symmetry and activity were calculated for each couple of muscles. A two-way analysis of variance was computed for SM: no Factor 1 (T1 vs T2) or Factor 2 (A vs B) or F1×F2 significant effects were found. SM recruitment was 31% of the maximal activity, with symmetry values larger than 80%. In conclusion, standardised electromyography allows a reliable assessment of Submental muscles activity.
（i）为评估颏下肌肉（SM）而开发的肌电图检查方案的可重复性和变异性；（ii）将新方案应用于最大程度紧咬牙，这是一项简单且已得到大量研究的静态任务，以便量化颏下肌肉的相对贡献。在20名年龄在19至35岁的健康受试者中，在有和没有棉卷以及舌头抵住上颚的情况下进行最大自主紧咬牙（MVC）时，对颏下肌肉、咬肌（MM）和颞肌前束（TA）进行表面肌电图检查。咬棉卷和舌头抵住上颚分别用于标准化咬肌和颞肌前束以及颏下肌肉的电位。这些练习在两次就诊时（T1 - T2）重复进行；在每个时间段内，颏下肌肉标准化也重复两次（A - B）以评估可重复性。计算每对肌肉的对称性和活性。对颏下肌肉进行双向方差分析：未发现因素1（T1与T2）或因素2（A与B）或F1×F2有显著影响。颏下肌肉的募集量为最大活性的31%，对称值大于80%。总之，标准化肌电图检查能够可靠地评估颏下肌肉的活动。
