实验在３３只成年猫上进行。Ｂｏｔｚｉｎｇｅｒ复合体内微量注入麦角辣根过氧化酶（ＷＧＡ－ＨＲＰ，３０－６０ｎｌ，５％，９例）后，在脑桥呼吸调整中枢结合臂外侧核及Ｋｏｌｌｉｋｅｒ－Ｆｕｓｅ核观察到大量ＨＲＰ标记神经元。在２０例动物中，检测了９１个在呼吸调整中枢记录到的呼吸神经元对电刺激Ｂｏｔｚｉｎｇｅｒ复合体的反应。其中１３个神经元（吸气性１１个，跨时相２个）可被逆行兴奋。实验结果表明，发自脑桥呼吸调整中枢神经元的轴突可投射到Ｂｏｔｚｉｎｇｅｒ复合体，这一投射通路可能与呼吸调节有关。 Experiments were performed on 33 adult cats. A large number of HRP-labeled neurons were observed in the centrilobular central armpits and Kolliker-Fuse nuclei after microinjection of ergot-horseradish peroxidase (WGA-HRP, 30-60nl, 5%, 9) into the Botzinger complex. In 20 animals, the responses of 91 respiratory neurons recorded in the respiratory modulation center to the electrically stimulated Botzinger complex were examined. Thirteen of these neurons (11 inspiratory, 2 across) were retrogradely excited. The experimental results show that axons from the pontine respiratory central nervous system can be projected onto the Botzinger complex, which may be related to respiratory regulation.