在PVN神经网中,最多见的是轴—树突触,其次是轴—体突触,偶尔可见树—树突触。根据所含的突触小泡不同,可把轴突末稍分为三类:Ⅰ、含有大量的清亮小泡,混有一些小的致密核心小泡。Ⅱ、含有大量圆的清亮小泡,混有一些大的致密核心小泡。Ⅲ、单纯含有大量圆及椭圆的清亮小泡,大小不等。多种不同性质的轴突末稍共同参与PVN的神经内分泌整合过程。 In the PVN neural network, the most common are axonal-dendritic synapses, followed by axonal synapses, with occasional tree-tree synapses. According to the synaptic vesicles contained different, the axons can be divided into three categories: Ⅰ, contains a large number of clear vesicles, mixed with some small dense core vesicles. Ⅱ, containing a large number of round, clear vesicles, mixed with some large dense core vesicles. Ⅲ, purely contains a large number of round and oval clear vesicles, sizes. A number of different axonal terminals participate in neuroendocrine integration of PVN.