Exploring the receptor origin of vibration-induced reflexes,Spinal Cord

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Exploring the receptor origin of vibration-induced reflexes
Spinal Cord ( IF 2.2 ) Pub Date : 2020-01-15 , DOI: 10.1038/s41393-020-0419-5
Mustafa A Yildirim ₁ , Betilay Topkara ₂ , Tugba Aydin ₁ , Nurdan Paker ₁ , Derya Soy ₁ , Evrim Coskun ₁ , Kadriye Ones ₁ , Aysenur Bardak ₁ , Nur Kesiktas ₁ , Mustafa G Ozyurt ₂ , Berna Celik ₁ , Burcu Onder ₁ , Aysegul Kılıc ₁ , Habib C Kucuk ₁ , Ilhan Karacan ₁ , Kemal S Türker ₂

Affiliation

Study design

An experimental design.

Objectives

The aim of this study was to determine the latencies of vibration-induced reflexes in individuals with and without spinal cord injury (SCI), and to compare these latencies to identify differences in reflex circuitries.

Setting

A tertiary rehabilitation center in Istanbul.

Methods

Seventeen individuals with chronic SCI (SCI group) and 23 participants without SCI (Control group) were included in this study. Latency of tonic vibration reflex (TVR) and whole-body vibration-induced muscular reflex (WBV-IMR) of the left soleus muscle was tested for estimating the reflex origins. The local tendon vibration was applied at six different vibration frequencies (50, 85, 140, 185, 235, and 265 Hz), each lasting for 15 s with 3-s rest intervals. The WBV was applied at six different vibration frequencies (35, 37, 39, 41, 43, and 45 Hz), each lasting for 15 s with 3-s rest intervals.

Results

Mean (SD) TVR latency was 39.7 (5.3) ms in the SCI group and 35.9 (2.7) ms in the Control group with a mean (95% CI) difference of −3.8 (−6.7 to −0.9) ms. Mean (SD) WBV-IMR latency was 45.8 (7.4) ms in the SCI group and 43.3 (3.0) ms in the Control group with a mean (95% CI) difference of −2.5 (−6.5 to 1.4) ms. There were significant differences between TVR latency and WBV-IMR latency in both the groups (mean (95% CI) difference; −6.2 (−9.3 to −3.0) ms, p = 0.0001 for the SCI group and −7.4 (−9.3 to −5.6) ms, p = 0.011 for Control group).

Conclusions

The results suggest that the receptor of origin of TVR and WBV-IMR may be different.

中文翻译：

探索振动诱发反射的受体起源

学习规划

一个实验设计。

目标

本研究的目的是确定脊髓损伤 (SCI) 患者和非脊髓损伤 (SCI) 个体的振动诱发反射的潜伏期，并比较这些潜伏期以确定反射电路的差异。

环境

伊斯坦布尔的三级康复中心。

方法

本研究包括 17 名慢性 SCI 患者（SCI 组）和 23 名非 SCI 参与者（对照组）。测试了左比目鱼肌的强直振动反射 (TVR) 和全身振动诱发的肌肉反射 (WBV-IMR) 的潜伏期，以估计反射的起源。以六种不同的振动频率（50、85、140、185、235 和 265Hz）施加局部肌腱振动，每个振动频率持续 15 秒，休息间隔为 3 秒。WBV 以六种不同的振动频率（35、37、39、41、43 和 45 Hz）应用，每个持续 15 秒，休息间隔为 3 秒。

结果

SCI 组的平均 (SD) TVR 潜伏期为 39.7 (5.3) ms，对照组为 35.9 (2.7) ms，平均 (95% CI) 差异为 -3.8 (-6.7 至 -0.9) ms。SCI 组的平均 (SD) WBV-IMR 潜伏期为 45.8 (7.4) ms，对照组为 43.3 (3.0) ms，平均 (95% CI) 差异为 -2.5 (-6.5 至 1.4) ms。两组的 TVR 潜伏期和 WBV-IMR 潜伏期存在显着差异（平均 (95% CI) 差异；-6.2（-9.3 至 -3.0）ms， SCI 组p = 0.0001 和 -7.4（-9.3 至−5.6) ms, p = 0.011 (对照组)。