Haavik Heidi, Murphy Bernadette
New Zealand College of Chiropractic, Auckland, New Zealand.
J Manipulative Physiol Ther. 2011 Feb;34(2):88-97. doi: 10.1016/j.jmpt.2010.12.009.
The objectives of this study were to investigate whether elbow joint position sense (JPS) accuracy differs between participants with a history of subclinical neck pain (SCNP) and those with no neck complaints and to determine whether adjusting dysfunctional cervical segments in the SCNP group improves their JPS accuracy.
Twenty-five SCNP participants and 18 control participants took part in this pre-post experimental study. Elbow JPS was measured using an electrogoniometer (MLTS700, ADInstruments, New Zealand). Participants reproduced a previously presented angle of the elbow joint with their neck in 4 positions: neutral, flexion, rotation, and combined flexion/rotation. The experimental intervention was high-velocity, low-amplitude cervical adjustments, and the control intervention was a 5-minute rest period. Group JPS data were compared, and it was assessed pre and post interventions using 3 parameters: absolute, constant, and variable errors.
At baseline, the control group was significantly better at reproducing the elbow target angle. The SCNP group's absolute error significantly improved after the cervical adjustments when the participants' heads were in the neutral and left-rotation positions. They displayed a significant overall decrease in variable error after the cervical adjustments. The control group participants' JPS accuracy was worse after the control intervention, with a significant overall effect in absolute and variable errors. No other significant effects were detected.
These results suggest that asymptomatic people with a history of SCNP have reduced elbow JPS accuracy compared to those with no history of any neck complaints. Furthermore, the results suggest that adjusting dysfunctional cervical segments in people with SCNP can improve their upper limb JPS accuracy.
本研究的目的是调查有亚临床颈部疼痛（SCNP）病史的参与者与无颈部不适的参与者之间肘关节位置觉（JPS）准确性是否存在差异，并确定调整SCNP组功能失调的颈椎节段是否能提高其JPS准确性。
25名有SCNP病史的参与者和18名对照参与者参与了这项前后对照实验研究。使用电子角度计（MLTS700，ADInstruments，新西兰）测量肘关节JPS。参与者在颈部处于4种位置时重现先前呈现的肘关节角度：中立位、屈曲位、旋转位和屈曲/旋转联合位。实验干预为高速低幅度颈椎调整，对照干预为5分钟休息期。比较两组的JPS数据，并使用3个参数在干预前后进行评估：绝对误差、恒定误差和可变误差。
在基线时，对照组在重现肘关节目标角度方面明显更好。当参与者头部处于中立位和左旋位时，SCNP组在颈椎调整后的绝对误差显著改善。颈椎调整后，他们的可变误差总体上显著降低。对照干预后，对照组参与者的JPS准确性变差，绝对误差和可变误差有显著的总体影响。未检测到其他显著影响。
这些结果表明，与无任何颈部不适病史的人相比，有SCNP病史的无症状者肘关节JPS准确性降低。此外，结果表明，调整SCNP患者功能失调的颈椎节段可提高其上肢体JPS准确性。
