刺激面神经核背内侧区及腹内侧区对颏舌肌和膈肌肌电活动的影响  

EFFECTS OF STIMULATION OF DORSAL MEDIAL AREA AND VENTRAL MEDIAL AREA OF NUCLEUS FACIALIS ON MYOELECTRIC ACTIVITIES OF GENIOGLOSSUS AND PHRENIC MUSCLE

作　　者：王丽[1] 刘磊[1] 徐欣[2] 

机构地区：[1]山东医科大学基础医学院生理教研室,济南250012 [2]卫生部耳鼻喉科学重点实验室

出　　处：《生理学报》1999年第4期439-444,共6页Acta Physiologica Sinica

基　　金：国家自然科学基金

摘　　要：在４４ 只氨基甲酸乙酯麻醉、断双侧迷走神经的健康成年家兔上， 观察电、化学刺激面神经核背内侧区（ｄＭＮＦ） 和腹内侧区（ｖＭＮＦ） 对颏舌肌和膈肌肌电活动的影响。结果如下：（１） 长串电脉冲刺激ｄＭＮＦ引起颏舌肌和膈肌肌电活动明显增强；（２） 短串电脉冲刺激ｄＭＮＦ， 当刺激落位于吸气相时， 引起颏舌肌和膈肌在吸气相的肌电活动延长， 当刺激落位于呼气相时， 引起颏舌肌和膈肌在呼气相的肌电活动提前终止；（３） 长串电脉冲刺激ｖＭＮＦ使颏舌肌和膈肌肌电活动明显被抑制；（４） 短串电脉冲刺激ｖＭＮＦ， 当刺激落位于吸气相时， 引起颏舌肌和膈肌在吸气相的肌电活动提前终止， 当刺激落位于呼气相时， 引起颏舌肌和膈肌在呼气相的肌电活动延长；（５） 在ｄＭＮＦ和ｖＭＮＦ分别微量注射谷氨酸钠， 其效应与电刺激结果基本一致。结果提示：ｄＭＮＦ和ｖＭＮＦ均参与对颏舌肌肌电活动的调节，从而对上呼吸道阻力也有一定的影响。Effects of electrical and chemical stimulation of the dorsal and ventral medial area of nucleus facialis (dMNF and vMNF) on myoelectric activities of genioglossus and phrenic muscle were observed in 44 urethane anaesthetized and vagotomized rabbits. The results are as follows. (1) Long train electrical stimulation at the dMNF facilitated myoelectric activities of genioglossus and phrenic muscle. (2) Short train electrical stimulation of dMNF, when delivered in the inspiratory phase, caused prolongation of myoelectric activities of genioglossus and phrenic muscle; but when delivered in the expiratory phase, myoelectric activities of genioglossus and phrenic muscle were shortened. (3) Long train electrical stimulation at the vMNF inhibited myoelectric activities of genioglossus and phrenic muscle. (4) Short train electrical stimulation of vMNF caused shortening of myoelectric activities of genioglossus and phrenic muscle, when delivered in the inspiratory phase, but a prolongation when delivered in the expiratory phase. (5) The effects of microinjection of glutamate to dMNF and vMNF were similar to those of electrical stimulation. The above results suggest that both dMNF and vMNF participate in the regulation of the myoelectric activities of genioglossus and the upper airway resistance.

关 键 词：面神经核 背内侧区 腹内侧区 颏舌肌 膈肌 肌电 

分 类 号：Q473[生物学—生理学] R332.3[医药卫生—人体生理学]