In order to probe into the mechanism of Si-bai point for treatment abovediseases. we adopted the HRP method tracing the distribution and connectionsof the Si-Bai point. Application of 10-20% HRP 20 μl solution was injected into the Sibai po-int

34 albumen rats were used. After a survival time of 24-48 hours

theanimals were sacrificial and their hearts were perfused with 2% paraformalde-hyde solution in 0. 1M phosphate acid buffer PH 7. 4

the semi-lunar ganglionof trigeminal nerve and upper cervical ganglion of sympathetic nerve

brainstem were cut and lay up in the 30% sucrose solution in freezer over night

and freezing section 40μm

obseryed the labeled cells in the semi-lunar ganglion

upper cervical sympathetic ganglion and brain stem.