应用免疫细胞化学PAP漂浮法研究了电击足底、寒冷和烫伤条件下大鼠下丘脑强啡肽B(Dynorphin B,DynB)神经元的变化。结果表明;电击足底条件下具有Dyn B阳性神经元的室旁核、室旁核内侧区前后径,室旁核Dyn B神经元总数,视上核中粗纤维明显增加;寒冷条件下室旁核Dyn B阳性神经元有下降趋势;烫伤后正中隆起处阳性纤维着色加深。上述结果表明Dyn B与上述应激反应的调节有关。 The changes of rat hypothalamus Dynorphin B (DynB) neurons in the condition of electric shock plantar, cold and scald were studied by immunocytochemistry PAP floating method. The results showed that the number of Dyn B neurons in the paraventricular nucleus, the medial paraventricular nucleus, the number of Dyn B neurons in the paraventricular nucleus, and the supraoptic nucleus in the striatum were significantly increased under cold shock Nuclear Dyn B-positive neurons have a downward trend; burned positive bulge in the middle of the bulge and deepen. The above results indicate that Dyn B is involved in the regulation of the stress response.