An alternative method to enhance vagal activities and suppress sympathetic activities in humans

摘要: Vagal withdrawal and/or sympathetic overactivity is always accompanied by various kinds of stress and dangerous to the body. We proposed that mild acupuncture on Sishencong points may effectively enhance vagal activities but suppress regulations heart in humans. Experiments were carried out nine healthy male volunteers, while they lying a quiet room during 2-4 P.M. Acupuncture was applied 2 mm deep into skin using standard stainless needles at points, which are located vertex head, each 1 cm away from Baihui (GV 20) four directions. Four around temporal area selected as control points. Forty minutes precordial ECG signals before, during, after recorded continuously. Frequency-domain analysis stationary RR intervals performed evaluate total variance, high-frequency power (HF, 0.15-0.40 Hz) low-frequency (LF, 0.04-0.15 normalized units (LF%). resulted an increased HF decreased LF% compared with before stage. Such effects did not occur when manual The differences rate dynamics between groups took place 10 min initiation persisted even removal needles. Based these results, we concluded enhanced cardiac suppressed underlying mechanisms potential applications warrant further investigations.