Barona R, Montalt J, Escudero J, Campos A, Escudero M
Department of Otolaryngology, Valencia University General Hospital, Spain.
Acta Otorhinolaryngol Belg. 1993;47(3):347-50.
An electroneurographic study was made of the accessory nerve in 15 healthy subjects by conventional peripheral electrical stimulation and transcranial magnetic stimulation at three different levels: cortical contralateral (frontoparietal), homolateral occipital and at the base of the skull. The motor evoked potential (MEP) obtained by magnetic stimulation at the skull base exhibited greater latency and amplitude than that recorded by conventional peripheral electrical stimulation. The MEP obtained by stimulating at occipital level again exhibited a greater latency than that corresponding to skull base stimulation, but the amplitude was smaller. Finally, the MEP resulting from cortical stimulation failed to appear uniformly in all of the individuals studied. Its amplitude was smaller than in the previous cases, with a mean latency of 11.76 ms and a central conduction time of 7.5 ms. The magnetic stimulation technique allowed the efficient, painless, non-invasive and easily reproducible study of the motor pathway of the spinal nerve over its entire trajectory (motor cortex-motor neuron-muscle).
通过传统的外周电刺激和经颅磁刺激，在三个不同水平（对侧皮质（额顶叶）、同侧枕叶和颅底）对15名健康受试者的副神经进行了神经电图研究。在颅底通过磁刺激获得的运动诱发电位（MEP）比通过传统外周电刺激记录的MEP具有更长的潜伏期和更大的波幅。在枕叶水平刺激获得的MEP潜伏期再次比颅底刺激对应的潜伏期更长，但波幅更小。最后，皮质刺激产生的MEP在所有研究个体中并非均一出现。其波幅比之前的情况更小，平均潜伏期为11.76毫秒，中枢传导时间为7.5毫秒。磁刺激技术能够对脊神经运动通路在其整个行程（运动皮质 - 运动神经元 - 肌肉）进行高效、无痛、非侵入性且易于重复的研究。
