Effect of Acupuncture Stimulation on the Blood Flow of the Skeletal Muscles in Rabbits / 全日本鍼灸学会雑誌

ABSTRACT

To clarify the effect of acupuncture on the skeletal muscle blood flow, measurements of muscle blood flow by hydrogen gas clealance method were taken on the left anterior tibial muscles of thirty rabbits (weighing about 2.5 to 3.3 kg) anesthetized with pentobarbital sodium (35mg/kg, i.v.). Arterial blood pressure in the common carotid artery and body temperature were also measured.<BR>Blood flow was measured 6 times every 10 min. In the stimulation group, acupuncture needles were inserted into the center of the anterior tibial muscle before the third measurement and “sparrow pecking” was performed, then the needles were removed. In the denervation group, the sciatic nerve was cut to observe the influence of denervation on the effect of acupuncture.<BR>In the stimulation group (n=12), a significant increase in blood flow to the muscles occurred after acupuncture stimulation, compared with the control group (n=12). The increase in blood flow in the stimulation group was maintained until the final measurement. Arterial blood pressure and body temperature did not change.<BR>The blood flow values in the second and third measurements were 18.1 ± 2.2, and 17.6 ± 2.4, respectively, in the control group, and 17.8 ± 1.8 and 25.9 ± 2.2 ml/min/ 100g (mean ± S.E.) in the stimulation group. The changes in blood flow values from the second to the third measurement were -0.5 ± 0.3 ml/min/100g in the control group, and +8.2 ± 2.0 ml/min/100g in the stimulation group. An increase in blood flow after acupuncture stimulation also occurred in the denervation group (n=3).<BR>Despite there being no change in arterial blood pressure. blood flow was increased after acupuncture stimulation, and the increment of blood flow after acupuncture stimulus was also observed in the denervation group. Therefore, the increment of blood flow seems to have been caused by vasodilation of the blood vessels induced by axon reflex.