Electrical stimulation of Zusanli (ST36 ) point and Trigeminal Sensory'Nucleus (TSN) as well asmicroelectroderecording from the laminae II - VI of the lumbar spinaldorsal horn have been used onthe pentobarbitalanesthetized rats

finding and identifying l42 spinal neurons responding to the stimulation of both ST36 and TSN. Among them

29 responded antidromically to TSN 1 the others

responded orthodromically to TSN; These neurons distributed in the L2-S1 segments

the most in theL3- L6segments

and in the laminae IlI-V

occasionally in the laminae II and Vl in the spinal dorsa1horn

the IMTM andWDR neurons were 50% respectively of them. The results indicate that (i) single spinsal dorsal horn neurons receives ST36 afferent input and then conveys it to theTSN; (ii) somespinal dorsal horn neurons receive

in turn

innervation frotn TSN; (iii) The convergence and integration berween ST36 and TSN inputs might occur in the spinal dorsal horn neurons.