Mauthner细胞脊髓EPSP前电位在外侧树突上的分布

首都医科大学学报 ›› 1999, Vol. 20 ›› Issue (1): 1-4.

Mauthner细胞脊髓EPSP前电位在外侧树突上的分布

高娜, 童学红, 张淑华, 李效义, 虞穿, 张茂先, 张英才

首都医科大学生理学教研室

收稿日期:1998-06-23 修回日期:1900-01-01 出版日期:1999-01-15 发布日期:2013-10-16

Distribution of Spinal pre-EPSP on the Lateral Dentrite of the Crucain Carp Mauthner Cell

Gao Na, Tong Xuehong, Zhang Shuhua, Li Xiaoyi, Yu Fen, Zhang Maoxian, Zhang Yingcai

Department of Physiology, Capital University of Medical Sciences

Received:1998-06-23 Revised:1900-01-01 Online:1999-01-15 Published:2013-10-16

摘要/Abstract

摘要： 用多点胞内穿刺方法在8个Mauthner细胞(M-细胞)探测了脊髓EPSP前电位(简称前电位)在外侧树突上的空间分布情况。结果表明,前电位的幅度在胞体处最大,沿外侧树突逐渐衰减,其衰减过程与逆向动作电位的衰减过程相似。提示中介前电位的突触集中分布于胞体;前电位与逆向动作电位相同,均以单纯的电紧张性扩布方式沿外侧树突传播。间接表明外侧树突上没有中介前电位的突触。

关键词: Mauthner细胞, 脊髓EPSP前电位, 外侧树突, 电紧张性扩布, 鲫鱼

Abstract: Spatial distribution of spinal pre-EPSP(pre-EPSP)on the lateral dendrite was explored with multiple intracelluar recording technique in 8 Mauthner cells of the crucian carps. The results showed that pre-EPSPwith maximal amplitude was recorded at the soma, from where its amplitude decayed progressively along the lateral dendrite. The style of decay was very comparable to that of antidromic action potential. It is suggested that: ① The synapses mediating pre-EPSP are located densely at the soma; ② As the antidromic action potential, the pre-EPSP propagates along the lateral dendrite simply in the manner of electrotonic spread. It means that no synapses mediating pre-EPSP impinge on the lateral dendrite.

Key words: mauthner cell, spinal pre-EPSP, lateral dendrite, electrotonic spread, crucain carp

中图分类号:

R426

高娜;童学红;张淑华;李效义;虞穿;张茂先;张英才. Mauthner细胞脊髓EPSP前电位在外侧树突上的分布[J]. 首都医科大学学报, 1999, 20(1): 1-4.

Gao Na;Tong Xuehong;Zhang Shuhua;Li Xiaoyi;Yu Fen;Zhang Maoxian;Zhang Yingcai. Distribution of Spinal pre-EPSP on the Lateral Dentrite of the Crucain Carp Mauthner Cell[J]. Journal of Capital Medical University, 1999, 20(1): 1-4.

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