Krueger Eddy, Scheeren Eduardo M, Nogueira-Neto Guilherme N, Button Vera Lúcia da S N, Nohama Percy
CPGEI, Universidade Tecnológica Federal do Paraná, Curitiba, PR, Brazil.
Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:2060-3. doi: 10.1109/EMBC.2012.6346364.
Several pathologies can cause muscle spasticity. Modified Ashworth scale (MAS) can rank spasticity, however its results depend on the physician subjective evaluation. This study aims to show a new approach to spasticity assessment by means of MMG analysis of hamstrings antagonist muscle group (quadriceps muscle). Four subjects participated in the study, divided into two groups regarding MAS (MAS0 and MAS1). MMG sensors were positioned over the muscle belly of rectus femoris (RF), vastus lateralis (VL) and vastus medialis (VM) muscles. The range of movement was acquired with an electrogoniometer placed laterally to the knee. The system was based on a LabVIEW acquisition program and the MMG sensors were built with triaxial accelerometers. The subjects were submitted to stretching reflexes and the integral of the MMG (MMG(INT)) signal was calculated to analysis. The results showed that the MMG(INT) was greater to MAS1 than to MAS0 [muscle RF (p = 0.004), VL (p = 0.001) and VM (p = 0.007)]. The results showed that MMG was viable to detect a muscular tonus increase in antagonist muscular group (quadriceps femoris) of spinal cord injured volunteers.
多种病理情况可导致肌肉痉挛。改良Ashworth量表（MAS）可对痉挛程度进行分级，但其结果取决于医生的主观评估。本研究旨在展示一种通过对腘绳肌拮抗肌群（股四头肌）进行肌电信号（MMG）分析来评估痉挛的新方法。四名受试者参与了该研究，根据MAS分为两组（MAS0和MAS1）。MMG传感器放置在股直肌（RF）、股外侧肌（VL）和股内侧肌（VM）的肌腹上。通过放置在膝关节外侧的电子角度计获取运动范围。该系统基于LabVIEW采集程序，MMG传感器由三轴加速度计构建。受试者接受拉伸反射测试，并计算MMG信号的积分（MMG(INT)）用于分析。结果表明，与MAS0相比，MAS1的MMG(INT)更大[股直肌（p = 0.004）、股外侧肌（p = 0.001）和股内侧肌（p = 0.007）]。结果表明，MMG能够检测脊髓损伤志愿者拮抗肌群（股四头肌）肌张力的增加。
