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KMID : 1161920150120010026
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Journal of Medicine and Life Science
2015 Volume.12 No. 1 p.26 ~ p.29
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Ultrasonographic findings of median nerve according to the change of the wrist positions
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Han Eun-Young
Im Sang-Hee
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Abstract
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Objectives : To assess the changes of ultrasonographic findings of median nerve according to the change of wrist positions in normal adults.
Methods : We studied 26 normal hands using musculoskeletal ultrasonography. A cross-sectional area, antero-posterior diameter, transverse diameter and a flattening ratio of median nerve were measured in neutral, in 30 degree of flexion and in 30 degree of extension positions of the wrist.
Results : The cross-sectional area of median nerve was significantly increased on the wrist flexion (P<0.05), compared to that of the neutral position. The flattening ratio of median nerve was significantly decreased in the position of wrist flexion (P<0.05), but significantly increased in the position of wrist extension (P<0.05), compared to that of the neutral position.
Conclusion : Ultrasonography of median nerve showed structural changes according to the changes of the wrist position in normal adults. Further large-scaled studies comparing healthy controls with the patients with carpal tunnel syndrome ranging of age are mandatory to reveal the mechanical effects of wrist position on median nerve.
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KEYWORD
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Ultrasonography, Carpal tunnel, Wrist Position
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