Abstract
BackgroundHigh-resolution ultrasound is being widely used in carpal tunnel examination to understand morphological and biomechanical characteristics of the median nerve and surrounding anatomy structures.Main bodyHealthy young and elderly men were recruited. The median nerve at proximal wrist region was examined by ultrasound imaging technique. A total of seven wrist angle was examined. Generally, the median nerve cross-sectional area of the elderly group is significantly larger than the young group.Short conclusionWrist posture in greater flexion or extension caused a larger decrease in the median nerve cross-sectional area across both groups.
Highlights
High-resolution ultrasound is being widely used in carpal tunnel examination to understand morphological and biomechanical characteristics of the median nerve and surrounding anatomy structures
Investigation of morphological changes and biomechanical relationship of the structures within the carpal tunnel is warranted for a wider understanding of median nerve deformation
The inclusion criteria are right-hand dominant by Edinburg Handedness Inventory [11], no previous Carpal tunnel syndrome (CTS) and wrist injury history by self-report, and the median nerve cross-sectional area (MNCSA) measurement of both hands fall within mean ± 2SD
Summary
High-resolution ultrasound is being widely used in carpal tunnel examination to understand morphological and biomechanical characteristics of the median nerve and surrounding anatomy structures. The median nerve cross-sectional area of the elderly group is significantly larger than the young group. Several ultrasound studies investigated the impact of biomechanical stresses such as finger flexor tendon gliding and external compression on the deformation of the median nerve in healthy and CTS individuals [2–5]. Investigation of morphological changes and biomechanical relationship of the structures within the carpal tunnel is warranted for a wider understanding of median nerve deformation. The underlying biomechanical factors of the active wrist and finger movements causing changes in the median nerve can be examined and analyzed using highresolution ultrasound imaging technique [6–8].
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