摘要
为明确前交叉韧带(anterior cruciate ligament, ACL)重建术后动作模式的改变情况,应用三维运动捕捉系统和表面肌电系统同步采集ACL重建术后患者在步行过程中的运动学、动力学和肌电数据。结果发现,与健侧相比,术侧膝关节屈曲角度峰值和屈伸活动范围均显著减小,但承重反应期的外旋幅度显著增加;术侧承重反应期膝关节伸直力矩峰值、支撑相末期膝关节屈曲力矩峰值和外旋力矩峰值均小于健侧;术侧股直肌在承重反应期的激活程度、股二头肌和半腱肌在摆动前期的激活程度均大于健侧。结果表明:ACL重建术后6~12个月(7.4±1.3月)步态呈僵硬特征,大腿肌群激活程度增加。建议ACL重建术后针对肌肉功能特征及步态特征的改变进行精准康复干预,改善术后效果。
The movement pattern and the corresponding biomechanical mechanisms of patients after the anterior cruciate ligament(ACL) reconstruction are essential factors for improving the postoperative effects and preventing secondary injuries. The three-dimensional kinematic, kinetic data, and the surface electromyography activity data are collected bilaterally(for surgical,intact limbs) during patients’ level walking 6 to 12 months after the ACL reconstruction(7.4 ± 1.3 months). The threedimensional angles and moments of the knee joint are calculated. The activation levels of the bilateral rectus femoris, the vastus medialis, the vastus lateralis, the biceps femoris, and the semitendinosus are also evaluated. It is shown that for the surgical limb, the peak knee flexion angle and the knee flexion-extension range of motion are significantly smaller, during the loading response, while the peak external rotation angle is significantly larger, compared with the intact limb. The surgical limb has smaller peak knee extension moment during the loading response phase, smaller peak knee flexion moment, and external rotation moment during the terminal stance phase compared with the intact limb. The peak activation level of the rectus femoris during the loading response phase, and the peak activation levels of the biceps femoris and the semitendinosus during the pre-swing phase are significantly higher in the surgical limb as compared with the intact limb. Patients have a stiffer gait pattern with a significant smaller peak knee flexion angle during the early stance and swing phases in the surgical limb 6 to 12 months after the ACL reconstruction. Patients also have a higher activation level of the quadriceps and the hamstring in the surgical limb compared with the intact limb. The surgical limb also has a greater knee external rotation during the loading response phase and a smaller external rotation moment during the terminal stance phase compared with the intact limb. The rehabilitation protocol after the ACL reconstruction should focus on the abnormal changes in the muscle function and the gait characteristics for better postoperative outcomes.
作者
时会娟
丁立
任爽
梁子轩
胡晓青
黄红拾
敖英芳
SHI Huijuan;DING Li;REN Shuang;LIANG Zixuan;HU Xiaoqing;HUANG Hongshi;AO Yingfang(School of Biological Science and Medical Engineering,Beijing Advanced Innovation Center for Biomedical Engineering,Beihang University,Beiing 100083,China;Institute of Sports Medieine,Peking University Third Hospital,Beiing Key Laboratory of Sports Injuries,Beijig 100091,China)
出处
《科技导报》
CAS
CSCD
北大核心
2020年第6期25-33,共9页
Science & Technology Review
基金
国家自然科学基金项目(81672212)。
关键词
前交叉韧带重建
运动医学
生物力学
anterior cruciate ligament reconstruction
sports medicine
biomechanics
