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视被盖兴奋性输入在Mauthner细胞腹侧树突上的分布

Distribution of Excitatory Inputs from the Optic Tectum on the Ventral Dendrite of the Mauthner Cell
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摘要 用多点胞内记录方法 ,在鲫鱼Mauthner细胞 (M细胞 )胞体和腹侧树突探测了逆向动作电位和刺激视被盖诱发的兴奋性突触后电位 (简称视被盖EPSP)的分布情况。结果表明 ,逆向动作电位的幅度在胞体处最大 ,沿腹侧树突逐渐衰减 ;视被盖EPSP在胞体处的幅度较小 ,沿腹侧树突逐渐增加。提示 :视被盖输入集中投射在腹侧树突近末梢端。 Distribution of the antidromic action potential evoked by the stimulation of the spinal cord (AAPSC) and EPSP evoked by the stimulation of the optic tectum (EPSPOT) on the soma and ventral dendrite of the crucian carp Mauthner cell was explored by means of multiple intracellular recording technique. The results showed that the maximum amplitude of the AAPSC was recorded at the soma, it declined progressively along the ventral dendrite. The minimum amplitude of EPSPOT was recorded at the soma, it increased gradually along the ventral dendrite and declined gradually near the end of the ventral dendrite. It suggested that the optic tectum inputs concentrated and impinged on the sites near the end of the ventral dendrite.
出处 《首都医科大学学报》 CAS 2000年第1期1-4,共4页 Journal of Capital Medical University
基金 北京市教委科研基金!990 4
关键词 MAUTHNER细胞 腹侧树突 视被盖 卿鱼 Mauthner cell ventral dendrite optic tectum crucian carp
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