学生竞赛(知识生成) ID 1985185

IF 2.4 Q1 REHABILITATION Topics in Spinal Cord Injury Rehabilitation Pub Date : 2023-09-01 DOI:10.46292/sci23-1985185s
Sisuri G. Hemakumara, Zahra Karamzadeh, Darren J. Mann, Trevor S. Barss, Vivian K. Mushahwar
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引用次数: 0

摘要

经皮脊髓刺激(tSCS)可促进涉及运动功能的脊髓网络。本研究的目的是比较应用于脊髓颈部的经皮脊髓刺激(tSCS)所使用的刺激器和振幅对下肢本体脊髓调制的影响。皮质脊髓和脊髓反射兴奋性分别通过下肢运动诱发电位(MEPs)和霍夫曼(H-)反射进行评估。 招募了神经系统完好的参与者(6 人)。他们使用了两种刺激器(NeoStim-5 和 DS8R),并在阈值(thresh)和最大耐受量(max)时使用了不同的 tSCS 振幅。评估了 tSCS 对诱发比目鱼肌 H 反射振幅的影响,以及颈部 tSCS 对诱发胫骨前肌 MEPs 的影响。参与者完成了五个条件,包括1) 对照组(无刺激) 2) DS8R Thresh 3) DS8R Max 4) NeoStim-5 Thresh 5) NeoStim-5 Max。 在相同的 tSCS 振幅下,参与者对 NeoStim-5 的主观耐受性要好于 DS8R。所有参与者对 NeoStim-5 的最大耐受振幅都高于 DS8R。初步分析表明,在这一小部分参与者中,tSCS 振幅的变化似乎不会对 H 反射和 MEP 产生影响。 初步研究结果表明,在相同的 tSCS 振幅下,不同的刺激器会产生不同的感觉。刺激器振幅的变化似乎不会对本体脊髓调制的电生理结果产生影响。这项研究为了解 tSCS 的机制(包括皮肤激活)奠定了基础。
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Student Competition (Knowledge Generation) ID 1985185
Transcutaneous spinal cord stimulation (tSCS) facilitates spinal networks involving motor function. The purpose of this study is to compare the effect of stimulators used and amplitude of tSCS, applied at the cervical region of the spinal cord, on propriospinal modulation of lower limbs. Corticospinal and spinal reflex excitability were assessed with lower limb motor evoked potentials (MEPs), and Hoffman (H-) reflexes, respectively. Neurologically intact participants (n=6) were recruited. Two stimulators (NeoStim-5 and DS8R) were used, and different tSCS amplitudes at threshold (thresh) and maximum tolerance (max) were applied. The effect of tSCS on the amplitude of the H-reflex evoked in the soleus muscle was assessed, as well as the effect of cervical tSCS on MEPs evoked in the tibialis anterior muscle. Participants completed five conditions including: 1) Control (no stimulation) 2) DS8R Thresh 3) DS8R Max 4) NeoStim-5 Thresh 5) NeoStim-5 Max. At the same tSCS amplitude, the participants subjectively tolerated the NeoStim-5 better than the DS8R. The maximum tolerated amplitude for NeoStim-5 was higher than that of the DS8R, for all participants. Preliminary analysis suggests changes in tSCS amplitude delivered, do not appear to have an effect on the H-reflex and MEP in this small sample of participants. Preliminary findings indicate that different stimulators produce different sensations at the same tSCS amplitudes. Changes in stimulator amplitudes do not appear to have an effect on the electrophysiological outcome on propriospinal modulation. This study sets the basis for understanding mechanisms of tSCS, including cutaneous activation.
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来源期刊
CiteScore
3.20
自引率
3.40%
发文量
33
期刊介绍: Now in our 22nd year as the leading interdisciplinary journal of SCI rehabilitation techniques and care. TSCIR is peer-reviewed, practical, and features one key topic per issue. Published topics include: mobility, sexuality, genitourinary, functional assessment, skin care, psychosocial, high tetraplegia, physical activity, pediatric, FES, sci/tbi, electronic medicine, orthotics, secondary conditions, research, aging, legal issues, women & sci, pain, environmental effects, life care planning
期刊最新文献
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