Senchik Iu N, Pluzhnikov L T, Polenov A L
Tsitologiia. 1976 Mar;18(3):275-83.
With electron microscope two types of synaptic buttons (SB) are found on the nuerosecretory cells (NSC) in the nucleus preopticus of the mature carp. SB type I contain dense core vesicles and synaptic vesicles, whereas SB type II have only the latter. SB type II is considered to be functionally more active. The density of SB on the NSC body surface varied inversely proportionally to the NSC size, being in average 1.7+/-0.2 on the section of one small NSC in the ventral part of the nucleus preopticus, and 1.0+/-0.1 on the section of a large one in the dorsal part (P less than 0.05). In large NSC type II SB are found more frequent than in small NSC, the synaptic apparatus of NSC in the dorsal part of the nucleus preopticus is in a more active stage, than of NSP in the ventral part. The structural organization of the complex SB-NSC of large cells is more complicated compared to that of small cells. The large cells are supposed to be more differentiated and functionally more active. The synapses of NSC of the nucleus preopticus of the carp are supposed to belong usually to axons of monaminergic neurons.
在成熟鲤鱼视前核的神经分泌细胞（NSC）上，通过电子显微镜发现了两种类型的突触小体（SB）。I型突触小体含有致密核心囊泡和突触囊泡，而II型突触小体仅含有后者。II型突触小体被认为在功能上更活跃。突触小体在神经分泌细胞体表的密度与神经分泌细胞大小成反比，在视前核腹侧一个小神经分泌细胞切片上平均为1.7±0.2，在背侧一个大神经分泌细胞切片上为1.0±0.1（P<0.05）。在大神经分泌细胞中，II型突触小体比在小神经分泌细胞中更常见，视前核背侧神经分泌细胞的突触装置比腹侧的处于更活跃的阶段。与小细胞相比，大细胞的突触小体-神经分泌细胞复合体的结构组织更复杂。大细胞被认为分化程度更高，功能上更活跃。鲤鱼视前核神经分泌细胞的突触通常被认为属于单胺能神经元的轴突。
