Objective:To study the changes of 5-HT in (Periaqueductal central gray matter PAG) ,Nucleus raphes maguns in brain stem and drosal horn of spinal cord after stimulation of hippocampus and to investigate the mechanism of hip-pocampal analgesia.

• 目的:探讨刺激大鼠海马后导水管周围灰质(Periaqueductal central gray matter,PAG)、中缝大核(Nucleusraphes magnus,NRM)和脊髓背角5-HT的变化,分析海马在镇痛中的作用机制。