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KMID : 0948920050040020175
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Clinical Pain
2005 Volume.4 No. 2 p.175 ~ p.180
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The Effect of TENS and Low Level Laser on the Experimental Persistent Musculoskeletal Pain in the Rat
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Lee Sheng-Huo
Sohn Min-Kyun
Lee Ku-Young
Kim Bong-Ok
Min Kwon-Hong
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Abstract
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Objective: This study was performed to investigate the effect of transcutaneous electrical nerve stimulation (TENS) and low-level laser (LLL) irradiation for the persistent muscle pain model in the rat.
Method: Secondary hyperalgesia was produced by two times injection of pH 6.0 acidic saline into the gastrocnemius muscle of Sprague-Dawley rats. TENS and LLL were applied to the injected hind leg for 10 minutes everyday for 3 weeks after second injection, respectively. The withdrawal responses to the mechanical and cold stimuli were measured before and 25 minutes after the treatment.
Results: The mechanical and cold hyperalgesia were significantly decreased at 25 minutes after TENS and LLL irradiation (p＜0.05), however the effects did not last for 24 hours. There were no difference in treatment effect between TENS and LLL irradiation.
Conclusion: These results suggested secondary hyperalgesia of muscle origin was relieved by TENS and LLL irradiation for short duration of time. Therefore TENS and LLL would be applied for the treatment of muscle pain and related referred pain more than ones per day, clinically.
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KEYWORD
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Persistent muscle pain, Acidic saline, Animal model, TENS, Low-level laser
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