中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (6): 906-909.doi: 10.4103/1673-5374.208565

• 综述:脊髓损伤修复保护与再生 • 上一篇    下一篇

脊髓损伤后周围神经与macro-sieve刺激电极的关联

  

  • 收稿日期:2017-06-12 出版日期:2017-06-15 发布日期:2017-06-15
  • 基金资助:

    该项研究由美国华盛顿大学医学院神经外科的SCIDRP项目基金赞助支持

Interfacing peripheral nerve with macro-sieve electrodes following spinal cord injury

Nathan K. Birenbaum1, Matthew R. MacEwan1, 2, Wilson Z. Ray1, 2   

  1. 1 Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA; 2 Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO, USA
  • Received:2017-06-12 Online:2017-06-15 Published:2017-06-15
  • Contact: Wilson Z. Ray, M.D., rayz@wustl.edu.
  • Supported by:

    This research was supported by an SCIDRP grant to Matthew R. MacEwan in the Department of Neurological Surgery at Washington University School of Medicine.

摘要:

脊髓损伤(SCI)是一种衰弱性病症,对受影响个体的健康和生产力有害。对SCI患者运动功能恢复的一个有希望的方法是使用周围神经接口(PNI)。PNI是一种用于从周围神经刺激或记录的微电极阵列,在是一种脊髓损伤远端情况。目前正在开发多种类型的PNI作为神经肌肉控制和功能性电刺激递送的潜在方法。文中讨论了大电极筛选(MSE)作为SCI恢复运动功能潜在目标的适用性。然而,任何再生筛网电极直接神经整合都需要对目标神经横切,并且完全取决于神经的再生能力 - 这也是确定筛选适用性的两个复杂因素。此外,MSE植入到PNS会造成初始CNS损伤后的第二次损伤,直观地可能影响周围神经的再生能力,因为SCI损伤远端的周围神经轴突具有改变性结构形态。我们的临床经验和越来越多的文献证明使用周围神经传递尾部到损伤部位进行临床康复,表明了MSE可能会提供更广泛的使用尾部脊髓段。我们试图研究MSE植入后SCI是否仍然可以用于选择性招募远端肌肉组织。

ORCID:0000-0002-3006-8562(Wilson Z. Ray)

Abstract:

Macro-sieve electrodes were implanted in the sciatic nerve of five adult male Lewis rats following spinal cord injury to assess the ability of the macro-sieve electrode to interface regenerated peripheral nerve fibers post-spinal cord injury. Each spinal cord injury was performed via right lateral hemisection of the cord at the T9–10 site. Five months post-implantation, the ability of the macro-sieve electrode to interface the regenerated nerve was assessed by stimulating through the macro-sieve electrode and recording both electromyography signals and evoked muscle force from distal musculature. Electromyography measurements were recorded from the tibialis anterior and gastrocnemius muscles, while evoked muscle force measurements were recorded from the tibialis anterior, extensor digitorum longus, and gastrocnemius muscles. The macro-sieve electrode and regenerated sciatic nerve were then explanted for histological evaluation. Successful sciatic nerve regeneration across the macro-sieve electrode interface following spinal cord injury was seen in all five animals. Recorded electromyography signals and muscle force recordings obtained through macro-sieve electrode stimulation confirm the ability of the macro-sieve electrode to successfully recruit distal musculature in this injury model. Taken together, these results demonstrate the macro-sieve electrode as a viable interface for peripheral nerve stimulation in the context of spinal cord injury.

Key words: peripheral nerve interface, regenerative electrode, nerve regeneration, spinal cord injury, spinal cord lateral hemisection, electromyography, muscle force