脊髓膨大处的磁刺激。
Magnetic stimulation over the spinal enlargements.
作者信息
Ugawa Y, Rothwell J C, Day B L, Thompson P D, Marsden C D
机构信息
MRC Human Movement and Balance Unit, Institute of Neurology, London, UK.
出版信息
J Neurol Neurosurg Psychiatry. 1989 Sep;52(9):1025-32. doi: 10.1136/jnnp.52.9.1025.
Abstract
Magnetic stimulation over the cervical and lumbar spinal enlargements was performed in 10 normal volunteers using a 9 cm diameter coil. Although the threshold and the amplitude of responses depended on the position of the coil and the direction of current flow within it, the latency was constant. The latencies obtained by magnetic stimulation were compatible with those obtained using high voltage electrical stimulation of the spinal nerve roots and always were shorter than the peripheral motor conduction time estimated by F-wave techniques. The site of activation by magnetic stimulation appears to be very similar to that stimulated by the high-voltage electrical method. Stimulation of descending motor tracts within the cord was not possible using the magnetic stimulator.
摘要
使用直径9厘米的线圈对10名正常志愿者的颈段和腰段脊髓膨大进行磁刺激。尽管反应的阈值和幅度取决于线圈的位置和其中电流的流动方向，但潜伏期是恒定的。磁刺激获得的潜伏期与使用脊髓神经根高压电刺激获得的潜伏期相符，并且总是短于通过F波技术估计的外周运动传导时间。磁刺激的激活部位似乎与高压电刺激法刺激的部位非常相似。使用磁刺激器无法刺激脊髓内的下行运动束。
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