Bikchentaeva Leisan, Nikulina Margarita, Shulman Anna, Baltin Maxim, Zheltukhina Angelina, Semenova Elena, Smirnova Viktoriya, Klepikova Svetlana, Baltina Tatyana
Institute of Fundamental Medicine and Biology, Kazan Federal University, Karla Marksa 76, 420015 Kazan, Russia.
Sport Science Department, Sirius University of Science and Technology, Olympic Ave. 1, 354349 Sirius Federal Territory, Russia.
J Funct Morphol Kinesiol. 2024 Aug 22;9(3):142. doi: 10.3390/jfmk9030142.
Transcutaneous spinal cord stimulation (tSCS) is a promising noninvasive alternative to epidural stimulation. However, further studies are needed to clarify how tSCS affects postural control. The aim of this study was to investigate the effect of transcutaneous cervical spinal cord stimulation on postural stability in healthy participants via computerized stabilization. The center of pressure and the frequency spectrum of the statokinesiogram were assessed in 14 healthy volunteers under tSCS conditions with frequencies of 5 Hz or 30 Hz, subthreshold or suprathreshold stimulus strength, open or closed eyes, and hard or soft surfaces in various combinations. The results revealed that not all the changes in the center of the pressure oscillations reached statistical significance when the tSCS was used. However, tSCS at a frequency of 30 Hz with a suprathreshold stimulus strength improved postural stability. The use of subthreshold or suprathreshold tSCS at 5 Hz led to a shift of 60% of the signal power to the low-frequency range, indicating activation of the vestibular system. With tSCS at 30 Hz, the vestibular component remained dominant, but a decrease in the proportion of high-frequency oscillations was observed, which is associated with muscle proprioception. Thus, transcutaneous electrical stimulation of the cervical spinal cord may be an effective method for activating spinal cord neural networks capable of modulating postural control.
经皮脊髓刺激（tSCS）是一种有前景的硬膜外刺激非侵入性替代方法。然而，需要进一步研究来阐明tSCS如何影响姿势控制。本研究的目的是通过计算机化稳定技术研究经皮颈脊髓刺激对健康参与者姿势稳定性的影响。在14名健康志愿者中，以5Hz或30Hz的频率、阈下或阈上刺激强度、睁眼或闭眼以及硬或软表面等各种组合的tSCS条件下，评估压力中心和姿势运动图的频谱。结果显示，使用tSCS时，并非所有压力振荡中心的变化都具有统计学意义。然而，30Hz频率、阈上刺激强度的tSCS改善了姿势稳定性。5Hz的阈下或阈上tSCS使用导致60%的信号功率转移到低频范围，表明前庭系统被激活。在30Hz的tSCS时，前庭成分仍然占主导，但观察到高频振荡比例下降，这与肌肉本体感觉有关。因此，颈脊髓的经皮电刺激可能是激活能够调节姿势控制的脊髓神经网络的有效方法。
