体感诱发电位检查腰骶神经根病变的意义

本文采用自制的针电极和改进的方法,记录了50例正常人在分别刺激胫后神经和节段性(根性)皮神经(腓肠和腓浅)时的腰髓电位(LP)和皮层电位(CP);接着又记录和观察了48例单侧L_5或S_1神经根受压患者上述神经受刺激时的LP和CP。结果发现:节段性皮神经刺激的LP异常率达85%,其CP为48%;胫后神经刺激的LP异常率为33%,其CP仅为8%。

THE SIGNIFICANCE OF THE EXAMINATION BY SOMATOSENSORY EVOKED POTENTIAL IN THE ASSESSMENT OF LUMBOSACRAL RADICULOPATHY

The needle-recording electrodes deviced by the author and the improved recording method were applied in this article. Firstly, the lumbar spinal evoked potentials (LPs) and cortial somatosensory evoked potentials (CPs)to the stimulation of tiable nerves and segmental (radcular) cutaneous nerves (superficial peroneal and sural nerves )were recorded in 50 normal volunteers. Then similiar thacings were recorded and observed in 48 patients with unilateral L_5 or S_1 root compression. We found that the LP to the segmental cutaneous nerve stimulation was abnormal in 85%, and its CP in 48%. The LP to the tiable nerve stimulation was abnormal in 33%,and its CP only in 8%.