很多资料表明,β-内啡肽(β-EP)是针刺过程中起镇痛作用的重要神经介质,但β-EP在电针镇痛中是否受频率的影响还不清楚。此外,近年来的研究资料表明,β-EP作为循环激素或局部激素对免疫功能有重要的调节作用,但脑内β-EP对免疫功能是否具有调节作用尚无直接证据。本实验用新生期大鼠注射谷氨酸单钠(MSG)的方法损毁弓状核,使人鼠全脑β-EP Numerous data indicate that β-EP is an important neurogenic mediator in the acupuncture analgesia, but whether or not β-EP is affected by frequency in electroacupuncture is unknown. In addition, recent studies show that β-EP plays an important regulatory role in immune function as a circulating hormone or local hormone. However, there is no direct evidence of whether β-EP plays a regulatory role in immune function. In this experiment, neonatal rats injected glutamate monosodium glutamate (MSG) method of arcuate nucleus damage, the whole rat brain β-EP