摘要
用HRP与荧光金(FG)结合的示踪法,观察了大鼠腰骶髓“内脏面”副交感节前神经元和上行投射神经元的定位分布。发现FG注入一侧臂旁外侧核或Barrington核后,逆行标记的金色荧光细胞出现于双侧L_5～S_2的“内脏面”,细胞密集于后连合核和中间带外侧核(IML),此外,还出现于双侧的I层及外侧脊髓核(LSN)。HRP注射于一侧盆神经后,逆标细胞出现于术侧的L_6和S的IML,偶见于中介核(IC)。在IML内,HRP标记的副交感节前神经元位于其腹侧份,而FG标记的上行投射神经元主要位于背侧和背内侧部,亦可见少数FG标记细胞混杂在HRP标记细胞之间。本研究结合已有的研究对IML的命名、组成和功能以及LSN的组成进行了讨论。
In the present study, the fluoro-gold(FG) and horseradish peroxidase(HRP) combined tracing method was used to investigate the localization of parasympathetic preganglionic neurons and ascending projection neurons in lumbosacral spinal cord of the rat. FG was injected into the lateral parabrachial nucleus(PBL) or into Barrington's nucleus on one side, and HRP was applied to the contralateral pelvic nerve. The retrogradely FG-labeled neurons were found in bilateral 'visceral field' at segments L_5-S_2, and the majority of them were concentrated in the intermediolateral nucleus (IML), and the dorsal commissural nucleus (DCN). In addition to these areas, some labeled neurons were also observed in bilateral lamina I and lateral spinal nucleus (LSN). The parasympathetic preganglionic neurons labeled with HRP were seen in the IML at segments L_6-S_1, occasionally appeared in the intercalated nucleus. In the IML area, HRP-labeled parasympathetic preganglionic neurons were located in its ventral part, however, the localization of FG-labeled neurons projected to the PBL and Barrington's nucleus were mainly found in the dorsal and dorsomedial part of the IML, and a few FG-labeled cells were scattered among HRP-labeled cells. Based on the present and other investigations, the nomenclature, organization and function of the IML and the composition of the LSN were discussed.
出处
《解剖学报》
CAS
CSCD
北大核心
1993年第3期244-248,T003,共6页
Acta Anatomica Sinica
基金
国家自然科学基金(39070330)
关键词
骶髓副交感核
内脏面
中间带外侧核
Sacral parasympathetic nucleus
Visceral field
Intermediolateral nucleus
HRP-FG combined tracing method
Rat
