穴位针刺引起大鼠痛阈明显上升,缰核内γ—氨基丁酸(GABA)含量增高。看来缰核内GABA的增多是抑制缰核活动引起痛阈上升的原因。 Point acupuncture caused a significant increase in the pain threshold in rats, and the content of gamma-aminobutyric acid (GABA) in the nucleus increased. It seems that the increase of GABA in the nucleus is the reason for the increase of the pain threshold caused by the inhibition of nucleus activity.