The Effect of Thumb Position on Median-Radial Latency Difference.
- Author:
Hye Won KIM
1
;
Eun Jin CHO
;
Young Jin KO
;
Sae Yoon KANG
Author Information
1. Department of Rehabilitation Medicine, The Catholic University of Korea, Korea.
- Publication Type:Original Article
- Keywords:
carpal tunnel syndrome;
median-radial latency difference (MRLD);
thumb position
- MeSH:
Artifacts;
Carpal Tunnel Syndrome;
Diagnosis;
Humans;
Mass Screening;
Radial Nerve;
Thumb*
- From:Journal of the Korean Academy of Rehabilitation Medicine
1997;21(1):200-204
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
In diagnosis of carpal tunnel syndrome, there are many techniques with high sensitivity Among them, the median-radial latency difference(MRLD) is one of the most useful technique in screening mild carpal tunnel syndrome w ith high sensitivity, no painful discomfort to patients and no motor artifact. In this study, we examined the effect of the thumb position (radial abduction and adduction) on the MRLD. Because the stimulation sites of the median sensory and superficial radial nerves are different from each other, the free movement of the thumb in this examinations is not avoidable. The results are 1) there is no significant effect of the thumb position on median sensory latency. 2) There is no significant effect of the thumb position on superficial radial latency. 3) There is significant effect of the thumb position on MRLD(P<0.01). Therefore, if we diagnose the mild carpal tunnel syndrome with MRLD, the thumb position must be maintained in neutral position through the examination.
