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首页> 外文期刊>Scandinavian journal of medicine & science in sports. >Corticospinal excitability can discriminate quadriceps strength indicative of knee function after ACL-reconstruction
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Corticospinal excitability can discriminate quadriceps strength indicative of knee function after ACL-reconstruction

机译：皮质孔兴奋性可以区分跨越ACL - 重建后膝关节函数的Quaddriceps强度

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Purpose To investigate relationships between quadriceps strength and neural activity, and to establish a clinical threshold of corticospinal excitability able to discriminate between patients with quadriceps strength indicative of satisfactory and unsatisfactory knee function after ACLR. Methods A total of 29 patients following primary, unilateral ACL-reconstruction (11 female, 23.2 +/- 8.1 years of age, 7.3 +/- 2.5 months since surgery) participated. Subjective knee function was quantified using the International Knee Documentation Committee (IKDC) subjective evaluation. Peak isokinetic knee extensor torque was assessed at 90 degrees/s. Quadriceps corticospinal excitability was quantified via active motor threshold (AMT, %2-Tesla) using transcranial magnetic stimulation during a 5% maximal voluntary isometric contraction of the quadriceps. Pearson's r correlations were used to assess the relationship between peak knee extensor torque and AMT. Receiver operating characteristic (ROC) curves were used to establish a threshold of (a) mass-normalized peak knee extensor torque to discriminate satisfactory knee function (IKDC >= 75.9%), and (b) AMT to discriminate quadriceps strength indicative of satisfactory knee function. Likelihood ratios (LR) and the magnitude of change in pre-post-test probability were calculated for each threshold. Results Active motor threshold was negatively correlated with mass-normalized peak knee extensor torque (r = -0.503, P = 0.005). Knee extensor torque >= 1.23 Nm/kg was an excellent discriminator of satisfactory knee function (AUC = 0.890, P = 0.002; (+)LR = 9.56). An AMT <= 50.5% was an excellent discriminator of quadriceps strength indicative of satisfactory knee function following ACLR (AUC = 0.839, P = 0.005; (+)LR = 23.75). Conclusion Lower corticospinal excitability was associated with lower quadriceps strength. An AMT above 50.5% was found to decrease the probability of having satisfactory knee strength by over 62%.
机译：目的探讨Quadriceps强度和神经活动之间的关系，并建立能够区分血管肌肉强度患者的皮质孔兴奋性的临床阈值，这表明ACLR后令人满意和不令人满意的膝关节功能。方法共29例患者后，单侧单侧 - 重建（11名女性，23.2 +/- 8.1岁，自手术以来7.3 +/- 2.5个月）参加。使用国际膝关节文件委员会（IKDC）主观评估量化主观膝关节。在90度/ s时评估峰值等内燃膝伸伸扭矩扭矩。在QuadRiceps的5％最大自愿等距收缩期间，通过活性电动机阈值（AMT，％2-Tesla）通过活性电动机阈值（AMT，％2-Tesla）来定量QuadRiceps皮质旋流性。 Pearson的R相关性用于评估峰值膝盖延伸扭矩和AMT之间的关系。接收器操作特性（ROC）曲线用于建立（a）质量归一化峰值伸展扭矩的阈值以区分令人满意的膝关节函数（Ikdc> = 75.9％），并且（b）amt以区分高肌肉强度指示令人满意的膝关节功能。每个阈值计算似然比（LR）和测试前概率的变化的大小。结果激活电机阈值与质量归一化峰值膝盖延伸扭矩负相关（r = -0.503，p = 0.005）。膝盖伸肌扭矩> = 1.23 nm / kg是令人满意的膝关节功能的优异判别器（AUC = 0.890，P = 0.002;（+）LR = 9.56）。 AMT <= 50.5％是ACLR后令人满意的膝关节功能的QuadRiceps强度的优异判别器（AUC = 0.839，P = 0.005;（+）LR = 23.75）。结论较低的皮质脊髓兴奋性与较低的QuadRiceps强度有关。发现AMT以上50.5％，以减少膝关节强度超过62％的可能性。

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