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首页> 外文期刊>Journal of electromyography and kinesiology: Official journal of the International Society of Electrophysiological Kinesiology >Muscle recruitment and coordination during upper-extremity functional tests
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Muscle recruitment and coordination during upper-extremity functional tests

机译：肌肉招募和协调在上肢功能测试中

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摘要

Performance-based tests, such as the Jebsen Taylor Hand Function Test or Chedoke Arm and Hand Activity Inventory, are commonly used to assess functional performance after neurologic injury. However, the muscle activity required to execute these tasks is not well understood, even for unimpaired individuals. The purpose of this study was to evaluate unimpaired muscle recruitment and coordination of the dominant and non-dominant limbs during common clinical tests. Electromyography (EMG) recordings from eight arm muscles were monitored bilaterally for twenty unimpaired participants while completing these tests. Average signal magnitudes, activation times, and cocontraction levels were calculated from the filtered EMG data, normalized by maximum voluntary isometric contractions (MVICs). Overall, performance of these functional tests required low levels of muscle activity, with average EMG magnitudes less than 6.5% MVIC for all tests and muscles, except the extensor digitorum, which had higher activations across all tasks (11.7 +/- 2.7% MVIC, dominant arm). When averaged across participants, cocontraction was between 25 and 62% for all tests and muscle pairs. Tasks evaluated by speed of completion, rather than functional quality of movement demonstrated higher levels of muscle recruitment. These results provide baseline measurements that can be used to evaluate muscle-specific deficits after neurologic injury and track recovery using common clinical tests.
机译：基于表现的测试，如Jebsen-Taylor手功能测试或Chedoke手臂和手活动量表，通常用于评估神经损伤后的功能表现。然而，执行这些任务所需的肌肉活动并没有得到很好的理解，即使是对于没有受伤的个体。本研究的目的是在普通临床试验中评估优势和非优势肢体的未受损肌肉招募和协调。在完成这些测试的同时，对20名未受伤的参与者的8块手臂肌肉的肌电图（EMG）记录进行了双侧监测。平均信号强度、激活时间和协同收缩水平由过滤后的肌电图数据计算得出，并通过最大自愿等长收缩（MVIC）标准化。总的来说，这些功能测试的表现需要较低水平的肌肉活动，所有测试和肌肉的平均肌电幅度均小于6.5%MVIC，但趾伸肌除外，其在所有任务中都有较高的激活率（11.7+/-2.7%MVIC，优势臂）。在所有测试和肌肉对中，参与者的平均共收缩率在25%到62%之间。通过完成速度而非功能性运动质量评估的任务显示出更高水平的肌肉招募。这些结果提供了基线测量，可用于评估神经损伤后的肌肉特异性缺陷，并使用常见的临床试验追踪恢复情况。

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