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首页> 外文期刊>Journal of athletic training >Electrode Type and Placement-Configuration for Quadriceps Activation Evaluation
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Electrode Type and Placement-Configuration for Quadriceps Activation Evaluation

机译：股四头肌激活评估的电极类型和位置配置

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Context: The ability to accurately estimate quadriceps voluntary activation is an important tool for assessing neu-romuscular function after a variety of knee injuries. Different techniques have been used to assess quadriceps volitional activation, including various stimulating electrode types and electrode configurations, yet the optimal electrode types and configurations for depolarizing motor units in the attempt to assess muscle activation are unknown. Objective: To determine whether stimulating electrode type and configuration affect quadriceps central activation ratio (CAR) and percentage-of-activation measurements in healthy participants. Design: Crossover study. Setting: Research laboratory. Patients and Other Participants: Twenty participants (13 men, 7 women; age = 26+-5.3 years, height = 173.85+-7.3 cm, mass = 77.37+-16 kg) volunteered. Interventions): All participants performed 4 counterbalanced muscle activation tests incorporating 2 different electrode types (self-adhesive, carbon-impregnated) and 2 electrode configurations (vastus, rectus). Main Outcome Measure(s): Quadriceps activation was calculated with the CAR and percentage-of-activation equations, which were derived from superimposed burst and resting torque measurements. Results: No differences were found between conditions for CAR and percentage-of-activation measurements, whereas resting twitch torque was higher in the rectus configuration for both self-adhesive (216 +-66.98 Nm) and carbon-impregnated (209.1 +-68.22 Nm) electrodes than in the vastus configuration (209.5+-65.5 Nm and 204+-62.7 Nm, respectively) for these electrode types (F_(1.19) = 4.87, P=.04). In addition, resting twitch torque was greater for both electrode configurations with self-adhesive electrodes than with carbon-impregnated electrodes (F_(1.19) = 9.33, P = .007). Bland-Altman plots revealed acceptable mean differences for agreement between electrode type and configuration for CAR and percentage of activation, but l...
机译：背景：准确估计股四头肌自愿激活的能力是评估各种膝关节损伤后神经肌肉功能的重要工具。已经使用了不同的技术来评估股四头肌的意志活化，包括各种刺激性电极类型和电极构造，但是，在试图评估肌肉活化的运动单元去极化的最佳电极类型和构造是未知的。目的：确定刺激电极的类型和配置是否影响健康参与者的股四头肌中枢激活率（CAR）和激活百分比测量。设计：交叉研究。地点：研究实验室。患者和其他参与者：自愿参加了二十名参与者（13名男性，7名女性;年龄= 26 + -5.3岁，身高= 173.85 + -7.3 cm，体重= 77.37 + -16 kg）。干预）：所有参与者均进行了4次平衡肌肉激活测试，其中包括2种不同的电极类型（自粘，碳浸渍）和2种电极配置（输卵管，直肌）。主要观察指标：使用CAR和激活百分比方程计算股四头肌激活，这些方程是从叠加爆裂和静止扭矩测量中得出的。结果：CAR条件和激活百分比测量条件之间未发现差异，而自粘（216 + -66.98 Nm）和碳浸渍（209.1 + -68.22 Nm）的直肌形态中静息抽搐扭矩较高）的电极类型比这些电极类型（F_（1.19）= 4.87，P = .04）的马氏体配置（分别为209.5 + -65.5 Nm和204 + -62.7 Nm）要小。另外，具有自粘式电极的两种电极配置的静息抽动扭矩都大于含碳电极（F_（1.19）= 9.33，P = .007）。布兰德·奥特曼（Bland-Altman）图显示，CAR的电极类型和配置与激活百分比之间的一致性可接受的均值差，但是...

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