【論文摘要】Can Vibrotactile Stimulation on the Lumbopelvic Region Immediately Increase the Control of Transversus Abdominis and Multifidus During Abdominal Drawing-in Maneuver? A Preliminary Investigation

【論文摘要】震動觸覺刺激於腰髂區域能否立即增強腹橫肌與多裂肌的控制？初步研究

張雅惠(Ya-Hui Chang) ； 楊志鴻(Chich-Haung Yang)

《物理治療》 44卷2期 (2019/06) Pp. 154-155

https://doi.org/10.6215/FJPT.201906.P60

摘要

Background and Purpose: Motor control dysfunction in the lumbar spine may imply the alterations in muscle function of the abdominal and lumbar trunk muscles, including increased superficial muscles activity to compensate the lack of stability as well as an increase in thickness of the deep muscles such as transversus abdominis (TrA) and multifidus (MF) deep trunk muscles. The abdominal drawing in maneuver (ADIM) is commonly used to assess and train the recruitment of deep muscles, and can be evaluated by ultrasound imaging. Stochastic resonance (SR) noise, sub-sensory noise administered in the form of random has been presented to cause subthreshold sensorimotor signals to exceed threshold, allowing the weak signals to be detectable thus improving neural communication. The aim of this study was to examine whether giving vibration (VT) stimulus on TrA muscle and MF muscle using vibrotactile stimulation may increase the control of these muscles during ADIM. Methods: Sixteen healthy collegiate students participated in this study. Six of them who kept swimming hobby 3 times per week, and spent at least 30 min each time were allocated as the swimming group (SG), and the others were allocated to non-swimming group (NSG). A novel custom design vibrotactile stimulation system was used to produce VT or vibration with SR (VSR). Three situations were randomized in the experiments: no VT, VT, VSR. Before task data collection, all participants were instructed in how to perform the ADIM. During the ADIM, a pressure biofeedback unit (Stabilizer^(TM) Pressure Biofeedback, Chattanooga Group, Sydney, Australia) was monitored for any pressure increase indicative of spinal movement. Sonographic images were recorded at the rest and during ADIM, with a ＂hold the breath out＂ instruction. The thickness of the TrA and MF were measured. All statistical analyses were conducted with SPSS version 22.0 software. The Friedman test was used to compare the variables between different situations. As well, the Mann-Whitney test was used to compare the variables between groups. Significant level was setup as p ＜ 0.05. Results: The muscle thickness of TrA and MF at rest and during ADIM with VSR in both groups were significantly larger than that with usual and VT (p ＜ 0.05). In addition, there was no significant difference in each variable between SG and NSG (p ＞ 0.05). Conclusion: Vibrotactile stimulus by using SR mechanism on TrA and MF may increase the thickness of TrA and MF, implying the increase in muscle control during the ADIM. Clinical Relevance: The preliminary findings imply the promising information that the intervention of vibrotactile stimulation device (VTSD) may provide another option to help improve the control of TrA and MF in people with motor control dysfunction of lumbar spine.