In the present paper

influence of electroacupuncture(EA)on electrical activity of neurons ofdorsal horns of T(?)-T_3 spinal segments was analysed in chloralose-urethane anesthetized rahbits.Re-sults were:1).after EA of“Neiguan”(PC 6)

of the 31 dorsal horn neurons

11 increased signifi-cantly in their firing rate

4 decreased obviously and other 16 had no marked change;2).after EA of“Zusanli”(ST 36)

of the 28 neurons

only 2 increased significantly in firing rate

14 dereased andother 12 had no clear change;3).of the 6 neurons which all responded to EA of“Neiguan”(PC 6)and“gusanli”(ST 36)

5 were excited by“Neiguan”(PC 6)and suppressed by“Zusanli(ST 36);the other one was inhibited by both;4).the receptive field on the body surface and physiologicaltypes of 18 neurons were also examined.The results indicate that information from EA of“Neiguan”and“Zusanli”can converge to the neurons of dorsal horns of T_2-T_3 spinal cord

and different acu-points have a relative specificity.