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KMID : 0385220020120010026
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Korean Journal of Gerontology
2002 Volume.12 No. 1 p.26 ~ p.30
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Aging Effect on Median Nerve Conduction Study in Normal Person; 3-years Longitudinal Follow up Study
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Abstract
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Objective: This study was purposed to find the aging effect on neuro-muscular system in normal person during 3 years, longitudinally follow up especially.
Method: Both side of median nerve conduction study had been done from 1997 Sep. to 1998 Feb. in 30 normal person. Their mean age was 55.9 years, 17 person were men and 13 person were women. The Follow up study had been done nearly 3 years later. The parameters to evaluate were motor distal latency, sensory distal latency, motor distal amplitude, sensory distal amplitude and motor conduction velocity.
Result: Average motor distal latency of right and left median nerve increased from 3.26 msec. to 3.60 msec. (P<0.05) and from 3.22 msec. to 3.53 msec. (P<0.05) respectively over 3 years. Average sensory distal latency of both median nerve did not change significantly. Average motor distal amplitude of right and left median nerve decreased from 15.89 mV to 12.04 mV (P<0.05) and from 15.74 mV to 12.13 mV(P<0.05) respectively over 3 years. Average sensory distal amplitude of right and left median nerve decreased from 35.88 gV to 31.19 μV(P<0.05) and from 37.55 gV to 33.29 gV(P=0.09) respectively over 3 years. Average motor conduction velocity of both median nerve did not change significantly. Average F-wave latency of left median nerve decreased from 25.36 msec. to 24.39 msec. (P<0.05) over 3 years, but average F-wave latency of right median nerve did not change significantly.
Conclusion: During the 3-year follow up period, the motor distal latency in the both median nerve increased significantly and the motor distal amplitude decreased significantly. But the motor conduction velocity and the sensory distal latency in both median nerve did not change significantly. The sensory distal amplitude in the right median nerve decreased significantly but not in the left side(p=0.09). There was a significant decrement of the F-wave latency in the left median nerve but not in the right side.g
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KEYWORD
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longitudinal, aging, median nerve, nerve conduction study
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