Journal of the Korean Academy of Pediatric Dentistry 1998;25(4):788-796.
Published online November 30, 1998.
CHANGES OF JAW-OPENING REFLEX DEGREE ACCORDING TO ELECTROACUPUNCTURE DURATION ON ZUSANLI
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족삼리의 전기침 자극에 대한 개구반사 크기의 변화
서영아1, 송현근1, 나창수3, 이상호2
1조선대학교 치과대학 구강생리학교실
2조선대학교 치과대학 소아치과학교실
3동신대학교 한의과대학 경혈학교실
Abstract
The purpose of this study was to investigate the effect of various electroacupuncture duration induced by acupuncture point-Zusanli (S36) electrical stimulation on inhibition of amplitude of digastric electromyogram (dEMG) evoked by noxious electrical stimuli around the mental foramen. intraperitoneal sodium pentobarbital in an initial dose of 50mg/kg and maintenance doses of 4.5mg/kg/h were given through a cannula in the femoral vein using a constant infusion pump. A pair of stimulating electrodes were inserted for noxious stimuli around the mental foramen. An irritant electronic stimuli pulse (0.2 Hz, 0.1 ms duration) was produced with an intensity of about 1.5×2 times threshold for evoking the dEMG. The anterior belly of the digastric muscle was exposed and a pair of 0.1mm wire electrodes were inserted for dEMG recording. Acupuncture point stimulation on Zusanli (2 Hz, 250 μs, biphasic pulse, 2 V) was delivered by Dental Electronic Anesthesia (3M, U.S.A). For periods of electronic stimulation of 10, 20, and 30min, the amplitudes of dEMG were measured on the oscilloscope and on the monitor connected to the amplifier. The following results were obtained: The dEMG was decreased to 73.4% of that in the control set after 10 min electroacupunture stimulation (Group I); The dEMG was decreased to 77.1% (10min), 54.0.% (20min) of that in the control set after 20minutes of electroacupunture stimulation (Group II). The dEMG was decreased to 73.3% (10min), 61.9% (20min), 76.2% (30min) of that in the control set after 30 min of electroacupunture stimulation (Group III). From these results, it may be that in the electroacupuncture stimulation on the Zusnali resulted in a reduction of amplitude of dEMG and that the most effective electroacupuncture stimulation period was 20min.
Key Words: Electroacupuncture, JOR, Zusanli
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