Muscle force production and functional performance in spastic cerebral palsy: Relationship of cocontraction
Muscle force production and functional performance in spastic cerebral palsy: Relationship of cocontraction
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DOI：
10.1053/apmr.2000.5579
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发表时间：
2000-07-01
影响因子：
4.3
通讯作者：
Abel, MF
中科院分区：
文献类型：
--
作者：
Damiano, DL;Martellotta, TL;Abel, MF
目的：确定痉挛型脑瘫（CP）儿童的共同收缩与力量和运动功能的关系。设计：对10名受试者的便利样本进行前瞻性评价。设置：三级保健医院的儿科康复中心。患者：10名患有痉挛型CP的非卧床儿童，平均年龄5至14岁。主要结果测量：对腘绳肌和股四头肌力量进行单一综合评估。步态分析，同时监测这些肌肉中的肌电图（EMG）活动;实施粗大运动功能测量（GMFM）;在安静休息与步态期间监测心率，以计算能量消耗指数（EEI）。共收缩率和幅度被确定为步态和强度测试trials using the EMG data.Results：共收缩率在强度测试过程中直接与那些在自由步态。共收缩幅度和总EMG幅度与EEI呈反比关系;在激动剂和拮抗剂中具有更多肌肉活动的儿童往往更节能。膝关节伸肌肌力与GMFM和步态速度呈正相关。无论是cocontraction比，也不幅度在步态是相关的strength.Conclusions：CP儿童使用了类似的肌肉激活策略，在两个不同的运动任务。力量和共收缩与运动功能的不同方面有着独特的关系。需要进一步的研究，以更精确地量化cocontraction和力，在这个人群中的EMG关系。
Objective: To determine cocontraction's relation to strength and motor function in children with spastic cerebral palsy (CP).Design: Prospective evaluation with a convenience sample of 10 subjects.Setting: Pediatric rehabilitation center at a tertiary care hospital.Patients: Ten ambulatory children with spastic CP, mean age 5 to 14 yrs.Main Outcome Measures: A single comprehensive assessment of hamstring and quadriceps muscle strength; gait analysis while monitoring electromyographic (EMG) activity in those muscles; administration of the Gross Motor Function Measure (GMFM); heart-rate monitoring during quiet rest versus gait to compute an energy expenditure index (EEI). Cocontraction ratios and magnitudes were determined for the gait and strength testing trials using the EMG data.Results: Cocontraction ratios during strength tests correlated directly with those during free gait. Cocontraction magnitude and total EMG magnitude had an inverse relationship to EEI; children with more muscle activity in the agonist and antagonist tended to be more energy efficient. Knee extensor muscle strength correlated positively with the GMFM and gait velocity. Neither cocontraction ratio nor magnitude during gait was related to strength.Conclusions: Children with CP used a similar muscle activation strategy across two different motor tasks. Strength and cocontraction were uniquely related to different aspects of motor function. Further research is needed to quantify more precisely cocontraction and force to EMG relations in this population.