This study was scheduled to investigate the effect of low-power He-Ne laser (λ=632.8nm, 8.5mW) on the sympathetic nerue activity and pain sensory nerue.
Five-minute irradiation with the laser was performed on the shousanli (Li 10) of 10 volunteers (group T) as controls and on the area near stellate ganglion of 10 volunteers (group S).
The skin temperature and pain threshold were measured at the meeting point (Li 4, Hoku) using a pain meter (UDH104, Unique Medical) and finger blood flow and blood mass were measured at the 2nd fingertip using a doppler blood flow detector (ALF 2100, Advance) before, immediately after and 30 minutes after irradiation.
No change in the skin temperature, pain threshold and blood mass was observed in both groups Blood flow increased slightly in group S after irradiation but unchanged in group T.
These results suggested that laser it on the stellate ganglion appeared no change in the sympathetic tone of homeostatic condition.
