To study the effects of moxibustion of Baihui(GV 20) on the hemodynamics of middle cerebral artery (MCA) and posterior cerebral artery (PCA) in health subjects.Methods: Thirty cases of healthy male students between 20 and 22 years in the age were enrolled into this study. Vmax (maximal velocity of blood flow)

Vmin (minimal velocity of blood flow)

PI (pulsatile index) and RI(resistant index) of right MCA and PCA were measured before and after moxibustion of GV 20 (5～10?min each time

once daily

5 times altogether) by using Acuson Sequoia 512 Detector of Ultrasound Diagnostics.Results:Following moxibustion of GV 20

Vmax and Vmin of the right MCA

Vmax

Vmin

PI and RI of the right PCA increased significantly ( P <0.05～0 01). The rest indexes had no significant changes( P >0 05).Conclusion:Moxibustion of Baihui(GV 20) can significantly raise the velocity of blood flow of the right middle cerebral artery and posterior cerebral artery in normal people.