刺激大鼠高位颈髓诱发的下行性脊髓场电位

首都医科大学学报 ›› 1986, Vol. 7 ›› Issue (2): 117-123,168,169.

刺激大鼠高位颈髓诱发的下行性脊髓场电位

赵柏羽¹, 吕国蔚²

1. 北京第二医学院84级研究生;2. 北京第二医学院针麻·脑学研究室

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1986-04-15 发布日期:1986-04-15

Descending Spinal Field Potentials Evoked by Higher Cervical Spinal Stimulation in,the Rats

Zhao Boyu¹, Lu Guowei²

Department of Neurophysioloy

Received:1900-01-01 Revised:1900-01-01 Online:1986-04-15 Published:1986-04-15

摘要/Abstract

摘要：

在麻醉、麻痹大鼠的腰膨大处,用银球电极记录刺激C₂引起的下行性脊髓场电位（dSFP）,监与刺激腓神经引起的节段性脊髓场电位（sSFP）作了比较。与sSFP的A、N、P波相似,dSFP亦由锋电位（A′）、慢负（N′）、慢正（P′）波组成。N′、P′波的活动面积为N、P波的2～3倍;dSFP的纵行分布远大于sSFP;P′波的中部下凹,此凹在C₁横断后消失;dSFP在T_12—13横断背索后消失,横断T_10—11背外侧索后dSFP增强。结果提示,aSFP的A′、N′、P′波具有与sSFP的A、N、P波相似的脊髓起源,但经背索下传的颈髓刺激比节段性刺激能激动更多的脊髓成分。

Abstract:

Descending spinal field potentials (dSFP) evoked by C₂ stimulation in anesthetized and immobilized rats were recorded from the lumbar enlargement with silver-ball electrode and compared with the segmental spinal field potentials (sSFP) induced by peroneai nerve stimulation. Similar to waves A, N, and P of the sS FP, the dS FP consisted of a raPid spike (A’) , a slow nagative (N’) , and a slow positive (P’) waves. The active area of waves N’ and p’was 2-3 times larger than that of N and p waves’.The longitudinal distribution of dSFP was mush wider than the sSFPs’. In the middle of wave P’ there was a valley, which disappeared after C₁ transection.The dS FP vanished following cutting the dorsal columns whereas increased in size after bilateral transection of the dorsolatoral funiculi. The results indicate that waves A’, N’, and P’ of dSFP seem to possess the same intrasPinal origin as that of waves A, N, and P of the sS FP while the cervical stimulation descending the dorsal cofumns may activate more components in the spinal cord in comparison with the segmensal volleys.

赵柏羽;吕国蔚. 刺激大鼠高位颈髓诱发的下行性脊髓场电位[J]. 首都医科大学学报, 1986, 7(2): 117-123,168,169.

Zhao Boyu;Lu Guowei. Descending Spinal Field Potentials Evoked by Higher Cervical Spinal Stimulation in,the Rats[J]. Journal of Capital Medical University, 1986, 7(2): 117-123,168,169.