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KMID : 0378019860290050025
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New Medical Journal
1986 Volume.29 No. 5 p.25 ~ p.31
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Effect of Laser Acupuncture of Peripheral Nerve on Pain Reaction
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Abstract
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Experiments were conducted in ischemic decerebrate cats to study the effects of electrical ´stimulation of peripheral nerve and laser acupuncture on pain reaction.
Flexion reflex was used as an index of pain. The flexion reflex was elicited by stimulating the sural nerve (0. 5 msec duration, 20 V intensity) and recorded as a compound action potential from the nerve innervating the semitendinosus muscle. The common, peroneal nerve was selected and stimulated with 20 V intensity, 2 msec duration and 2 Hz frequency fo.- 30 min. Laser acupuncture was applied to the common ´ peroneal nerve with variabl e frequencies from 1 Hz to 5 KHz and variable exposure time from 15 sec to 30 min. After electrical nerve stimulation and laser acupuncture of the common peroneal nerve, the two flexion reflexes were recorded by the above method and the changes were observed.
The results are summarized as follows:
1) Electrical stimulation of the common peroneal nerve significantly depressed the flexion reflex. This effect was eliminated by systemic application of naloxone(0. 05~0. 1 mg/kg), a specific narcotic antagonist.
2) Laser acupuncture of the common peroneal nerve did not depress the flexion reflex.
These results suggest that the mechanism of pain relief by laser acupuncture is different from that of electroacupuncture or classic acupuncture. So new experimental models are thought to be required to explain the mechanism of pain relief by laser acupuncture.
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