Relationship between activation of ankle muscles and quasi-joint stiffness in early and middle stances during gait in patients with hemiparesis
Relationship between activation of ankle muscles and quasi-joint stiffness in early and middle stances during gait in patients with hemiparesis
复制标题
偏瘫患者步态早中期站位时踝关节肌肉激活与准关节僵硬的关系
DOI：
10.1016/j.gaitpost.2015.04.020
复制
发表时间：
2015
期刊：
影响因子：
2.4
通讯作者：
Izumi Shin-Ichi
中科院分区：
文献类型：
--
作者：
Sekiguchi Yusuke;Muraki Takayuki;Tanaka Naofumi;Izumi Shin-Ichi
目前尚不清楚肌肉收缩是否是必要的，以增加准关节僵硬度（QJS）的踝关节在步态轻偏瘫患者。本研究旨在探讨轻偏瘫患者步态站立期踝关节QJS与肌肉激活的关系。采用三维运动分析系统和表面肌电图测量了21例脑卒中偏瘫患者和10例健康人的时空和动力学步态参数以及腓肠肌（MG）、比目鱼肌（SOL）和胫骨前肌（TA）内侧头的激活。在站立早期，患者麻痹侧（PS）的QJS大于非PS侧（p< 0.05），且与三块肌肉的激活无显著相关性。中间站立时，PS侧QJS低于非PS侧（p< 0.05）和对照组右侧（p< 0.001），且与MG（r= 0.51，p < 0.05）和SOL（r= 0.49，p < 0.05）的激活呈正相关。在轻偏瘫患者中，跖屈肌激活可能不会在早期的立场QJS。另一方面，在中间的立场QJS可能是由于激活的MG和SOL。我们的研究结果表明，激活的MG和SOL在中间的立场上的PS可能需要加强，以增加QJS在步态轻偏瘫患者。
It is unclear whether muscle contraction is necessary to increase quasi-joint stiffness (QJS) of the ankle joint during gait in patients with hemiparesis. The purpose of the present study was to investigate the relationship between QJS and muscle activation at the ankle joint in the stance phase during gait in patients with hemiparesis. Spatiotemporal and kinetic gait parameters and activation of the medial head of the gastrocnemius (MG), soleus (SOL), and tibialis anterior (TA) muscles were measured using a 3-dimensional motion analysis system and surface electromyography, in 21 patients with hemiparesis due to stroke and 10 healthy individuals. In the early stance, the QJS on the paretic side (PS) of patients was greater than that on the non-PS (p< 0.05) and not significantly correlated with activation of the three muscles. In the middle stance, the QJS on the PS was lower than that on the non-PS (p< 0.05) and that on the right side of controls (p< 0.001), which was positively correlated with activation of the MG (r= 0.51,p< 0.05) and SOL (r= 0.49,p< 0.05). In the patients with hemiparesis, plantarflexor activation may not contribute to QJS in the early stance. On the other hand, QJS in the middle stance may be attributed to activation of the MG and SOL. Our findings suggest that activation of the MG and SOL in the middle stance on the PS may require to be enhanced to increase QJS during gait in patients with hemiparesis.