Department of Morphology, Stomatology and Physiology of the Ribeirão Preto Dental School (RPDS), University of São Paulo, São Paulo, Brasil.
J Oral Rehabil. 2010 Apr;37(4):248-55. doi: 10.1111/j.1365-2842.2010.02051.x. Epub 2010 Feb 11.
The purpose of this study was to evaluate the influence of age on the electromyographic activity of masticatory muscles. All volunteers were Brazilian, fully dentate (except for Group I - mixed dentition), Caucasian, aged 7-80, and divided into five groups: I (7-12 years), II (13-20 years), III (21-40 years), IV (41-60 years) and V (61-80 years). Except for Group V, which comprised nine women and eight men, all groups were equally divided with respect to gender (20 M/20 F). Surface electromyographic records of masticatory muscles were obtained at rest and during maximal voluntary contraction, right and left laterality, maximal jaw protrusion and maximal clenching in the intercuspal position. Statistically significant differences (P < 0.05) were found in all clinical conditions among the different age groups. Considerably different patterns of muscle activation were found across ages, with greater electromyographic activity in children and youth, and decreasing from adults to aged people.
本研究旨在评估年龄对咀嚼肌肌电图活动的影响。所有志愿者均为巴西人，全口有牙（除 I 组 - 混合牙列），白种人，年龄 7-80 岁，分为五组：I 组（7-12 岁）、II 组（13-20 岁）、III 组（21-40 岁）、IV 组（41-60 岁）和 V 组（61-80 岁）。除 V 组有 9 名女性和 8 名男性外，所有组在性别上均分为两组（20 名男性/20 名女性）。在休息和最大自主收缩、右侧和左侧、最大下颌前伸和最大牙尖交错位时，记录咀嚼肌的表面肌电图。在不同的年龄组中，所有临床条件下均存在统计学上显著差异（P<0.05）。在不同年龄段之间发现了肌肉激活的明显不同模式，儿童和青少年的肌电图活动较大，而从成年人到老年人则逐渐减少。
