Abnormal landing strategies after ACL reconstruction
Abnormal landing strategies after ACL reconstruction
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DOI：
10.1111/j.1600-0838.2008.00873.x
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发表时间：
2010-02-01
影响因子：
4.1
通讯作者：
Otten, E.
中科院分区：
文献类型：
--
作者：
Gokeler, A.;Hof, A. L.;Otten, E.
目的是分析前交叉韧带(ACL)重建后单腿跳着地过程中的肌肉活动和运动模式。9名(6名男性，3名女性)术后6个月重建前交叉韧带的患者和11名(8名男性，3名女性)健康对照组受试者执行HOP任务。分析下肢肌肉的肌电信号以确定着陆前的起效时间。使用Optotrak运动分析系统和测力板收集生物力学数据。用MatLab软件进行运动学和关节运动学计算。分析前交叉韧带重建患者与健康受试者之间的侧向差异以及患者与对照组之间的差异。在前交叉韧带重建的肢体中，除股内侧肌外，其余肌肉的发病时间均显著早于健侧。受累肢体在起跳过程中膝关节屈曲明显减少，在初次接触时屈膝增加。患肢伸膝力矩明显低于患肢。对照组中，非优势侧半腱肌、股外侧肌和腓肠肌内侧的发病时间明显早于优势侧。前交叉韧带重建术后6个月，患肢肌肉起病时间提前，运动方式发生改变。
The objective was to analyze muscle activity and movement patterns during landing of a single leg hop for distance after anterior cruciate ligament (ACL) reconstruction. Nine (six males, three females) ACL-reconstructed patients 6 months after surgery and 11 (eight males, three females) healthy control subjects performed the hop task. Electro-myographic signals from lower limb muscles were analyzed to determine onset time before landing. Biomechanical data were collected using an Optotrak Motion Analysis System and force plate. Matlab was used to calculate kinetics and joint kinematics. Side-to-side differences in ACL-reconstructed patients and healthy subjects as well as differences between the patients and control group were analyzed. In ACL-reconstructed limbs, significantly earlier onset times were found for all muscles, except vastus medialis, compared with the uninvolved side. The involved limbs had significantly reduced knee flexion during the take-off and increased plantarflexion at initial contact. The knee extension moment was significantly lower in the involved limb. In the control group, significantly earlier onset times were found for the semitendinosus, vastus lateralis and medial gastrocnemius of the non-dominant side compared with the dominant side. Muscle onset times are earlier and movement patterns are altered in the involved limb 6 months after ACL reconstruction.