MAIN OUTCOME MEASUREMENTS:Gastric movement and gastric electric activity were observed after microinjection of 5-HT,cyproheptadine, substance P,substance P antagonist,morphine and noradrenaline into NRM.

• 主要观察指标:中缝大核区微量注射5-羟色胺、赛庚啶、P物质、P物质拮抗剂、吗啡及去甲肾上腺素后胃运动、胃电的变化。