MUSCLE RECRUITMENT WITH INTRAFASCICULAR ELECTRODES
MUSCLE RECRUITMENT WITH INTRAFASCICULAR ELECTRODES
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DOI：
10.1109/10.83589
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发表时间：
1991-08-01
影响因子：
4.6
通讯作者：
HORCH, K
中科院分区：
文献类型：
--
作者：
NANNINI, N;HORCH, K
我们研究了肌肉招聘与聚四氟乙烯绝缘，25 μ m直径，Pt-Ir神经束内电极植入神经支配的腓肠肌和比目鱼肌的猫。本研究的目的是测量这些双极电极的性能，这些双极电极被设计为优化其记录外周神经单位活动的能力，作为刺激电极，募集曲线确定了最佳刺激配置为双相矩形脉冲，相间间隔约为500 μ s，持续时间约为50 μ s。半最大抽搐收缩所需的电流约为50 μ A。刺激所需的电流和电荷密度远低于被认为对所涉及的组织和电极材料安全的水平。当脊髓反射通路因挤压神经而中断时，给定刺激产生的力在某些情况下会发生变化，但在其他情况下则不会，这意味着脊髓反射的贡献是不一样的，在所有的植入物。我们得出结论，神经束内记录电极也是一个潜在的有价值的技术，功能性神经肌肉刺激，并保证进一步发展。
We have studied muscle recruitment with Teflon-insulated, 25-mu-m diameter, Pt-Ir intrafascicular electrodes implanted in nerves innervating the gastrocnemius and soleus muscles of cats. The purpose of this study was to measure the performance of these bipolar electrodes, which had been designed to optimize their ability to record unit activity from peripheral nerves, as stimulating electrodes.Recruitment curves identified the optimal stimulus configuration as a biphasic rectangular pulse, with an interphase separation of about 500-mu-s and a duration of about 50-mu-s. The current required for a half-maximal twitch contraction was on the order of 50-mu-A. Current and charge densities needed for stimulation were well below levels believed to be safe for the tissue and electrode materials involved.When the spinal reflex pathway was interrupted by crushing the nerve, the force produced by a given stimulus changed in some cases, but not in others, implying that the spinal reflex contribution was not the same in all the implants.We conclude that intrafascicular recording electrodes are also a potentially valuable technology for functional neuromuscular stimulation, and warrant further development.