Musculoskeletal Research Unit (UIM), University Center for Assistance, Teaching and Research (CUADI), University of Gran Rosario (UGR), Rosario, Argentina.
J Man Manip Ther. 2023 Apr;31(2):105-112. doi: 10.1080/10669817.2022.2085849. Epub 2022 Jun 16.
This laboratory cross-sectional study aimed at explore the muscle response (MR) of the upper trapezius, infraspinatus, biceps brachii and extensor carpi radialis brevis (ECRB) during the radial nerve-biased upper limb neurodynamic test (RN-ULNT) in healthy participants. Myoelectric activity was stage-by-stage recorded during two sequencing variants of the RN-ULNT: S1, in which elbow extension was the last movement; and S2, in which wrist flexion was the last movement. Final elbow and wrist joint angle and sensory response (SR) in five zones (Z1-Z5) were also registered. MR was qualitatively categorized as 'absent' (No-MR), 'true' (TMR) or 'uneven' (UMR). In both sequences, significant increases in muscle activity occurred mostly during shoulder abduction and elbow extension (p ≤ 0.009). Also, elbow extension but not wrist flexion increased the activity of the ECRB muscle (p ≤ 0.009). S2 showed significantly higher upper trapezius (p = 0.04) and biceps brachii (p = 0.036) muscle activity during wrist flexion, and higher report of SR in Z1 and Z4 (p < 0.001) compared to S1. Only the ECRB muscle showed significant differences in the MR type between S1 and S2 (TMR, p = 0.016; UMR, = 0,012). Our results may be useful in the assessment of upper limb musculoskeletal disorders.
本实验室横断面研究旨在探讨健康参与者在桡神经偏倚上肢神经动力学测试（RN-ULNT）中斜方肌上束、冈下肌、肱二头肌和桡侧腕短伸肌（ECRB）的肌肉反应（MR）。在两种 RN-ULNT 序列（S1 和 S2）中，分阶段记录肌电活动：S1 中，最后一个动作是肘部伸展；S2 中，最后一个动作是腕部弯曲。还记录了最终的肘部和腕关节角度以及五个区域（Z1-Z5）的感觉反应（SR）。MR 定性分为“无”（No-MR）、“真”（TMR）或“不均匀”（UMR）。在这两种序列中，肌肉活动主要在肩外展和肘部伸展时显著增加（p≤0.009）。此外，只有肘部伸展而不是腕部弯曲增加了 ECRB 肌肉的活动（p≤0.009）。与 S1 相比，S2 在腕部弯曲时显示出明显更高的斜方肌上束（p=0.04）和肱二头肌（p=0.036）肌肉活动，并且在 Z1 和 Z4 区域报告的 SR 更高（p<0.001）。只有 ECRB 肌肉在 S1 和 S2 之间的 MR 类型上表现出显著差异（TMR，p=0.016；UMR，p=0.012）。我们的结果可能有助于评估上肢肌肉骨骼疾病。
