Analysis of EMG patterns of control subjects and subjects with ACL deficiency during an unanticipated walking cut task
Analysis of EMG patterns of control subjects and subjects with ACL deficiency during an unanticipated walking cut task
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DOI：
10.1016/j.gaitpost.2006.07.001
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发表时间：
2007-04-01
期刊：
影响因子：
2.4
通讯作者：
Maloney, Mike
中科院分区：
文献类型：
--
作者：
Houck, Jeff R.;Wilding, Gregory E.;Maloney, Mike
目的：本研究的目的是描述与前交叉韧带 (ACL) 缺陷和对照受试者相关的股外侧肌 (VL)、内侧腘绳肌 (MH) 和外侧腘绳肌 (LH) 的肌肉激活模式。 方法：共有 54 名受试者参与了本研究，其中 25 名 ACL 缺陷受试者被细分为有能力者 (n = 9) 和无能力者 (n = 16)，使用临床标准。在意外的侧步切入任务中，以 1000 Hz 的频率记录肌肉激活模式。均方根处理数据（时间常数 11 毫秒）是从脚跟着地前到脚趾离地前 20% 的姿势进行整体平均。使用傅立叶系数的前五个和声作为特征，使用聚类分析算法划分肌肉激活模式。结果：大多数（76-93%）对照受试者对每块肌肉使用三种肌肉激活模式。铜组优先使用特定的 VL 和 MH 激活模式，频率比对照组高 2 倍以上。非应对者组还优先使用比对照组频繁的 2 倍以上的 MH 激活模式，并使用独特的 MH 和 LH 激活模式，与应对者和对照组不同。结论：特定的肌肉激活模式区分了健康和受伤的受试者子集，表明可能的肌肉激活模式有助于应对状态。 (c) 2006 Elsevier B.V. 保留所有权利。
Purpose: The purpose of this study was to describe the muscle activation patterns of the vastus lateralis (VL), medial hamstrings (MH) and lateral hamstrings (LH) associated with subjects that were anterior cruciate ligament (ACL) deficient and controls.Methods: A total of 54 subjects participated in this study including 25 ACL deficient subjects subdivided into copers (n = 9) and non-copers (n = 16) using clinical criteria. Muscle activation patterns were recorded at 1000 Hz during an unanticipated side step cut task. The root mean square processed data (time constant 11 ms) were ensemble averaged from 20% of stance before heel strike to toe off. Using the first five harmonies of the Fourier Coefficients as features, muscle activation patterns were divided using a cluster analysis algorithm.Results: A majority (76-93%) of control subjects used three muscle activation patterns for each muscle. The coper group preferentially used a particular VL and MH activation pattern > 2 times more frequently than controls. The non-coper group also preferentially used a MH activation pattern > 2 times more frequently than controls and utilized a unique MH and LH activation pattern, distinct from the copers and controls.Conclusions: Specific muscle activation patterns distinguish subsets of subjects that are healthy and injured, suggesting possible patterns of muscle activation that contribute to coping status. (c) 2006 Elsevier B.V. All rights reserved.