Neuromuscular responses in individuals with anterior cruciate ligament repair.
Neuromuscular responses in individuals with anterior cruciate ligament repair.
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DOI：
10.1016/j.clinph.2010.09.002
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发表时间：
2011-05
期刊：
影响因子：
--
通讯作者：
Shields RK
中科院分区：
文献类型：
--
作者：
Madhavan S;Shields RK
膝关节手术可能会改变神经肌肉对功能性动态任务中意外扰动的反应。长潜伏期反射（LLR）遵循经皮层通路，似乎可以通过任务需求进行修改，可能会在神经肌肉性能中发挥作用。我们研究了在负重任务中修复前交叉韧带（ACLR）的个体对意外扰动的股四头肌和腘绳肌LLR。我们还研究了LLR之前和之后的预期和意志性肌肉活动，以量化与手术修复相关的可能的反射适应。12名女性ACLR和12名健康女性对照进行了单腿蹲动作，跟踪正弦目标。屈曲阶段开始时的随机扰动产生跟踪误差（“过冲误差”）并触发代偿反射活动。ACLR受试者在意外扰动期间表现出更大的过冲误差和膝关节速度，LLR反应增加，绝对预期，短潜伏期反射和自愿股四头肌活动减少。ACLR受试者在动态单腿负重任务中表现出对扰动的反应受损和明显的EMG特征。未来的研究将确定ACLR患者神经适应的原因。神经肌肉适应可能是ACL损伤后康复干预的可行目标。
Knee surgery may alter the neuromuscular response to unexpected perturbations during functional, dynamic tasks. Long latency reflexes (LLR) follow a transcortical pathway and appear to be modifiable by task demands, potentially giving them a role in neuromuscular performance. We examined LLRs of the quadriceps and hamstrings in response to unexpected perturbations in individuals with a repaired anterior cruciate ligament (ACLR) during a weight-bearing task. We also investigated the anticipatory and volitional muscle activity that preceded and followed the LLR to quantify possible reflex adaptations associated with surgical repair. Twelve females with ACLR and twelve healthy female controls performed a single leg squat maneuver, tracking a sinusoidal target. Random perturbations at the start of the flexion phase yielded tracking errors (“overshoot errors”) and triggered compensatory reflex activity. ACLR subjects demonstrated greater overshoot error and knee velocity during unexpected perturbations, increased LLR responses, and reduced absolute anticipatory, short-latency reflex, and voluntary quadriceps activity. ACLR subjects showed impaired response to perturbation and a distinct EMG profile during a dynamic single leg weight-bearing task. Future research will determine the cause of neural adaptations in those with ACLR. Neuromuscular adaptations may be a viable target for post-ACL injury rehabilitation interventions.
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DOI：
10.1034/j.1600-0838.2002.01293.x
发表时间：
2002-12-01
影响因子：
4.1
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.2106/00004623-199808000-00006
发表时间：
1998-08-01
影响因子：
5.3
作者：
Irrgang, JJ;Snyder-Mackler, L;Harner, CD
通讯作者：
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影响因子：
3.8
作者：
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