Posteroanterior Cervical Transcutaneous Spinal Cord Stimulation: Interactions with Cortical and Peripheral Nerve Stimulation.

Posteroanterior Cervical Transcutaneous Spinal Cord Stimulation: Interactions with Cortical and Peripheral Nerve Stimulation.
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DOI:
10.3390/jcm10225304
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发表时间:
2021-11-15
影响因子:
3.9
通讯作者:
Harel NY
Harel NY
中科院分区:
医学2区
文献类型:
--
作者:
Wecht JR;Savage WM;Famodimu GO;Mendez GA;Levine JM;Maher MT;Weir JP;Wecht JM;Carmel JB;Wu YK;Harel NY

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经皮脊髓刺激(TSCS)已被证明具有有益调节脊髓运动和自主神经回路的潜力。我们有兴趣将颈部 TSCS 与其他形式的神经系统刺激结合起来,以增强服务于手部功能的回路的突触可塑性。我们对颈部 TSCS 使用一种新颖的配置,其中阳极放置在 ~C4–C5 上方,阴极放置在 ~T2–T4 上方。我们测量了 TSCS 单脉冲与运动皮层单脉冲或正中神经刺激(按不同时间间隔定时到达颈脊髓)的效果。在 13 名患有慢性颈脊髓损伤的参与者和 15 名未患有慢性颈脊髓损伤的参与者中,我们观察到阈下 TSCS 促进了手部肌肉对运动皮层刺激的反应,当 TSCS 定时到达颈椎突触时或皮层刺激到达后最多 10 毫秒时,有更大的促进作用。阈下 TSCS 的单脉冲对中值 H 反射反应或 F 波反应的幅度没有影响。这些发现支持了一个模型,其中 TSCS 与适当定时的皮层刺激相结合,有可能促进下行运动回路、节段传入神经和服务于手部的脊髓运动神经元之间的汇聚传输。需要进行大量参与者的研究以及重复配对的皮质和脊髓刺激。
Transcutaneous spinal cord stimulation (TSCS) has demonstrated potential to beneficially modulate spinal cord motor and autonomic circuitry. We are interested in pairing cervical TSCS with other forms of nervous system stimulation to enhance synaptic plasticity in circuits serving hand function. We use a novel configuration for cervical TSCS in which the anode is placed anteriorly over ~C4–C5 and the cathode posteriorly over ~T2–T4. We measured the effects of single pulses of TSCS paired with single pulses of motor cortex or median nerve stimulation timed to arrive at the cervical spinal cord at varying intervals. In 13 participants with and 15 participants without chronic cervical spinal cord injury, we observed that subthreshold TSCS facilitates hand muscle responses to motor cortex stimulation, with a tendency toward greater facilitation when TSCS is timed to arrive at cervical synapses simultaneously or up to 10 milliseconds after cortical stimulus arrival. Single pulses of subthreshold TSCS had no effect on the amplitudes of median H-reflex responses or F-wave responses. These findings support a model in which TSCS paired with appropriately timed cortical stimulation has the potential to facilitate convergent transmission between descending motor circuits, segmental afferents, and spinal motor neurons serving the hand. Studies with larger numbers of participants and repetitively paired cortical and spinal stimulation are needed.
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