Trunk stabilization estimated using pseudorandom force perturbations, a reliability study

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• 作者：M. Griffioen^a ; ^b ; E. Maaswinkel^a ; W.W.A Zuurmond^b ; J.H. van Dieë ; n^a ; ^{J.van.Dieen@VU.nl" class="auth_mail" title="E-mail the corresponding author} ; R.S.G.M. Perez^b ; ^c
• 关键词：Lumbar spine ; Low back pain ; System identification ; Intrinsic stiffness ; Reflexes
• 刊名：Journal of Biomechanics
• 出版年：2016
• 出版时间：25 January 2016
• 年：2016
• 卷：49
• 期：2
• 页码：244-251
• 全文大小：1701 K

文摘

Measurement of the quality of trunk stabilization is of great interest to identify its role in first occurrence, recurrence or persistence of low-back pain (LBP). Our research group has developed and validated a method to quantify intrinsic and reflex contributions to trunk stabilization from the frequency response function (FRF) of thorax movement and trunk extensor EMG to perturbations applied by a linear actuator. However, the reliability of this method is still unknown. Therefore, the purpose of this study was to investigate the between-day reliability of trunk FRFs in healthy subjects and LBP patients. The test–retest ICC׳s in patients were substantial for both admittance and reflex gains (ICC_3,1>0.73 and 0.67). In healthy subjects, the reliability of admittance gain was also substantial (ICC_3,1 0.66), but the reliability of the reflexive gain was only moderate (ICC_3,1 0.44). Although sample sizes were limited (13 healthy subjects and 18 LBP patients), these results show that trunk stabilization can be measured reliably, and represent a promising step towards using this method in further research in LBP patients.