基于生物力学分析Q值对颈肌疲劳的反映效果

发布时间：2018-01-29 18:00

本文关键词： 表面肌电信号颈肌疲劳积分肌电值近似熵疲劳指标Q值　出处：《仪器仪表学报》2017年04期 　论文类型：期刊论文

【摘要】：颈肌疲劳是导致颈椎病的主要原因之一。为了有效预测和缓解颈肌疲劳,结合生物力学理论分析了表面肌电信号(SEMG)对颈部肌肉疲劳状态的反映效果。选取身体健康,年龄在21~33岁的8名志愿者作为被试者。所有被试者保持屈颈位2h,采集颈6、颈7节段两侧上斜方肌的表面肌电信号。首先,采用经验模态分解(EMD)对肌电信号进行去噪;然后,提取并分析了积分肌电(IEMG)、近似熵(ApEn)、疲劳状态指标Q值等3种特征参数在屈颈过程中的变化规律。实验结果表明,随着屈颈时间的增加,积分肌电值呈上升趋势,近似熵和疲劳状态指标Q值呈下降趋势;其中,状态指标Q值对颈肌疲劳的反映效果最好,表现在数据稳定、差异明显、同生物力学分析相一致。本实验条件下,颈6、颈7节段肌电信号屈颈疲劳前后Q值的均值由0.37降低至0.21,采用按摩缓解后又恢复到0.33。本研究内容对长期处于屈颈位人群预防颈肌疲劳,减少颈椎病的发生具有重要的指导意义。
[Abstract]:Cervical muscle fatigue is one of the main causes of cervical spondylosis. Combined with biomechanical theory, the effect of SEMG on fatigue state of neck muscle was analyzed. Eight volunteers aged 21 to 33 years were selected as subjects. All subjects maintained flexion position for 2 hours and collected surface electromyography of the upper trapezius muscle on both sides of the cervical 6 and 7 segments. First of all. The EMG signal is de-noised by empirical mode decomposition (EMD). Then, the changes of three characteristic parameters, I. e. IEMG, approximate entropy and Q value of fatigue state index, are extracted and analyzed. The experimental results show that these three characteristic parameters change in the process of cervical flexion. With the increase of flexion time, the integral myoelectric value increased, the approximate entropy and the fatigue state index Q value decreased. Among them, the state index Q value of the best response to cervical fatigue, performance in the data is stable, significant differences, consistent with biomechanical analysis. In this experimental conditions, neck 6. The mean value of Q before and after cervical flexion fatigue was reduced from 0.37 to 0.21, and then recovered to 0.33 by massage. The content of this study was used to prevent cervical muscle fatigue for people in flexion position for a long time. Reducing the incidence of cervical spondylosis has important guiding significance.
【作者单位】：沈阳工程学院机械学院;东北大学机械工程与自动化学院;燕山大学测控技术与仪器河北省重点实验室;
【基金】：国家自然科学基金(51605419,51405073) 中国博士后面上项目(2016M600193)资助
【分类号】：R318.01;R681.5
【正文快照】： 1引言随着社会节奏的加快,电脑、智能手机、i Pad的广泛使用及长时间驾驶机动车,导致屈颈低头的人群增加,颈椎病患病率逐年上升。颈椎病的病因繁多,病理机制复杂。由于颈部肌肉在维持颈椎稳定过程中发挥着非常重要的作用[1-2],因此各种原因的颈痛均在不同程度上与慢性颈部肌肉

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