FINE-STRUCTURE OF SYNAPTIC ENDINGS ON MAUTHNER CELL OF GOLDFISH
FINE-STRUCTURE OF SYNAPTIC ENDINGS ON MAUTHNER CELL OF GOLDFISH
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DOI：
10.1002/cne.901560402
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发表时间：
1974-01-01
影响因子：
2.5
通讯作者：
NAKAJIMA, Y
中科院分区：
文献类型：
--
作者：
NAKAJIMA, Y
本文研究了金鱼毛特纳细胞的精细结构。将动物分为三组，每组三条鱼，每组灌注以下固定剂之一：四氧化锇、戊二醛或甲醛。在侧树突的远侧部分发现有大的有髓棒状末梢和小泡终扣（SVB）。棒状末梢具有混合突触的结构，并含有大而圆的突触囊泡。SVB，出现小的按钮，显示化学突触的结构特征，并包含小的突触囊泡，当用四氧化锇固定时是圆形的，但当用醛固定剂固定时变得细长。在外侧树突的近端部分、腹侧树突和细胞体（不包括轴突丘区域）上观察到小的有髓鞘的俱乐部末梢、SVB和大囊泡终末（LVB）。LVB多表现为大的终扣，表现为混合突触或化学突触的结构。它们含有大而圆的囊泡。在轴突丘和轴突起始段上，存在含有中等大小的细长囊泡的无髓鞘的俱乐部末梢和含有圆形中等大小囊泡的螺旋纤维末梢。人们试图将这些不同类型的结局与生理功能联系起来。
This study has investigated the fine structure of the Mauthner cell of the goldfish. The animals were divided into three groups of three fish and each group was perfused with one of the following fixatives: osmium tetroxide, glutaraldehyde, or formaldehyde. Large myelinated club endings and smallvesicle boutons (SVBs) are found on the distal part of the lateral dendrite. The club endings have the structure of the mixed synapse and contain large, round synaptic vesicles. The SVBs, appearing as small boutons, show structural features of the chemical synapse, and contain small synaptic vesicles, which are round when fixed with osmium tetroxide, but become elongated when fixed with aldehyde fixatives. Small myelinated club endings, SVBs, and large‐vesicle boutons (LVBs) are observed on the proximal part of the lateral dendrite, on the ventral dendrite, and on the cell body (excluding the axon hillock region). The LVBs, mostly appearing as large boutons, show the structure of either the mixed or the chemical synapse. They contain large, round vesicles. On the axon hillock and initial axon segment, there exist unmyelinated club endings containing medium‐size elongated vesicles and spiral fiber endings containing round medium‐size vesicles. An attempt was made to correlate these different types of endings within physiological functions.