You Position: Home > Paper

CHARACTERISTICS OF SYNAPTIC RESPONSES OF MOTONEURONS TO VENTROLATERAL FUNICULUS STIMULATION IN VITRO

( views:18, downloads:0 )
Author:
No author available
Journal Title:
ACTA PHYSIOLOGICA SINICA
Issue:
6
DOI:
10.3321/j.issn:0371-0874.1997.06.007
Key Word:
运动神经元;兴奋性突触后电位;下行激活;腹外侧索;脊髓;大鼠

Abstract: 应用新生大鼠脊髓薄片运动神经元(MN)细胞内记录技术,对电刺激腹外侧索(VLF)诱发的突触反应进行了电生理特征分析.结果在28个测试的MN中,22个(80%)有兴奋性突触后电位(VLF-EPSP)反应,其中2个跟随在抑制性突触反应之后,6个还对单或串刺激产生慢EPSP反应;VLF-EPSP的潜伏期频数分布呈峰坡性偏态;同一MN的VLF-EPSP与腹根EPSP间有典型的空间总和.VLF-EPSP的幅度随膜超极化而增大,随膜去极化而减小,但背根或腹根刺激诱发的EPSP幅度在膜电位改变时无明显变化.提示VLF中的下行纤维可能与MN的胞体或近端树突形成突触,而背根或腹根中传入纤维与MN的远端树突联系.药理学分析表明,VLF-EPSP可能是由谷氨酸主要激活非NMDA受体而介导的.

WanfangData CO.,Ltd All Rights Reserved
About WanfangData | Contact US
Healthcare Department, Fuxing Road NO.15, Haidian District Beijing, 100038 P.R.China
Tel:+86-010-58882616 Fax:+86-010-58882615 Email:yiyao@wanfangdata.com.cn