Ibañez V, Deiber M P, Mauguière F
Laboratoire de Neurophysiologie Sensorielle Appliquée à la Clinique, Hôpital Neurologique, Lyon, France.
Exp Brain Res. 1989;75(3):599-610. doi: 10.1007/BF00249911.
The effects of 50 Hz palm vibrations on somatosensory potentials (SEPs) evoked by electrical stimulation of the median nerve at the wrist and of the 2nd and 3rd fingers were studied in 10 normal subjects. Vibrations were found to produce attenuation of the N13 spinal and P14 brainstem potentials and of the N20 contralateral parietal response. Brachial plexus (N9, P9) and dorsal column (P11) responses were not modified by vibrations. These SEP findings show: 1) that vibrations do not interfere at the periphery with the processing of brief ascending volleys triggered by an electrical stimulus and 2) that such an interference does occur in spinal dorsal horn and cuneate nucleus. Reduced input transmission in the cuneate nucleus is likely to be responsible for perceptual alterations induced by vibrations.
在10名正常受试者中研究了50赫兹手掌振动对腕部正中神经以及第二和第三手指进行电刺激所诱发的体感诱发电位（SEP）的影响。发现振动会导致N13脊髓电位、P14脑干电位以及N20对侧顶叶反应的衰减。臂丛神经（N9、P9）和背柱（P11）反应未因振动而改变。这些SEP研究结果表明：1）振动在外周不会干扰由电刺激触发的短暂上行冲动的处理；2）这种干扰确实发生在脊髓背角和楔束核。楔束核中输入传递的减少可能是振动引起知觉改变的原因。
