This work is to study whut the analgesia of EA is related with specificity of channel point or innervatinu of point. The discharges of 28 NRM neurons and their nociceptive responses induced by stimulation of dental pulp or tail tip in rats were recorded.The effects of EA of "Shangguan" and "Yanglingquan"of gall bladder channel of foot shaoyang on NRM neurons and their nociceptive responses were comShangguan"and with that of and"Xiaguan"and "Zusanli"of the stomach channel of foot Yangming."Shangguan"and" Xiaguan"were located in the depressions at the upper and lower border of zygomatic arch respectively

and innervated by the n.trigeminus.The hind leg points"Yanglingquan"is located in the depression anterior and inferior to capitulum fibulae above "Zusanli" and both were innervated by n.Peroneus communis.The results showed that EA of "Shangguan"or"Xiaguan"could activateNRM

increasing unit discharges about 70

1

20% for 10120% for 10

1

5 minutes (P

<

0.0515 minutes (P

<

0.05

0

.001) and inhibit both nociceptive responses

but the inhibition on the nociceptive response induced by dental pulp (about - 60% for 50.001) and inhibit both nociceptive responses

but the inhibition on the nociceptive response induced by dental pulp (about - 60% for 5

1

0 minutes

P

<

0.0510 minutes

P

<

0.05

0

.001) was stronger than that by tail-tip (no effect or about-30% occasionally). "Yanglingquan"or "Zusanli" EA could also activate NRM and inhibit the nociceptive responses

but the inhibition on the nociceptive response of tail stimulation (about - 600.001) was stronger than that by tail-tip (no effect or about-30% occasionally). "Yanglingquan"or "Zusanli" EA could also activate NRM and inhibit the nociceptive responses

but the inhibition on the nociceptive response of tail stimulation (about - 60

-

40% for 30 minutes

P

<

0.05- 40% for 30 minutes

P

<

0.05

0

.001) was stronger and longer than that of dental pulp (about-40% for 50.001) was stronger and longer than that of dental pulp (about-40% for 5

1

0 mintues

P

<

0.0510 mintues

P

<

0.05

0

.001).It is suggested the analgesia of acupuncturing facial points and hind leg points is better on toothache and on tail pain respectively

but there is no difference in analgesic effect of point in the channel line from other one.It may be related to that

the information from point and pain area is converged in the same and proximal spinal segment