In order to clarify the mechanism of the effect of acupuncture-moxibustion therapy for local pain, the skin and muscular temperatures at the site of pain in patients exhibiting sciatica-like symptoms were measured by thermocouple thermometer before and after acupuncture-moxibustion therapy on acupuncture points.
Comparing the temperatures at the site of pain with those in the corresponding area on the contralateral side of the body, both skin and muscular temperatures were found to have a lower temperature at the site of pain than the corresponding normal sits in the contralateral side, however following acupuncture treatment therapy, the temperatures rose to near the values of the contralateral side.
The volume pulse wave heights in the painful area, measured by reflex type plethysmography, increased with the administration of acupuncture-moxibustion therapy and with returning the skin temperatures to the values of the contralateral side.
The volume pulse wave heights on the tips of the toes, measured by transparent type plethysmography, decreased when the lower limbs were raised to the level at which pain was felt, however following acupuncture-moxibustion therapy the rate of decrease in plethysmography reduced even when the lower limbs were raised.
When acupuncture was applied to the aupuncture points or to the tender muscle in patients, in whom due to severe tension of the scalene muscle blood circulation at the tips of the toes was suspended with movement of the head. When muccle relaxants were administered, similar effects were obtained,
From the above results it can be assumed that acupuncture-moxibustion therapy served to restore the decreased circulation, which is the cause of pain due to the increased muscular tonus.
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