| Title: | Elbow motion induces greater median nerve excursion and lower shear strain than wrist or finger motion in healthy volunteers |
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| Authors: | ID Tomažin, Tjaša (Author)
ID Omejec, Gregor (Author)
ID Umek, Nejc (Author)
ID Jengojan, Suren Armeni (Author)
ID Kamnik, Roman (Author)
ID Mandeljc, Ana (Author)
ID Snoj, Žiga (Author) |
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| Files: |  PDF - Presentation file, download (594,06 KB)
MD5: D949B74AEFE4EF9843EC9B4C04454A46
 URL - Source URL, visit https://onlinelibrary.wiley.com/doi/epdf/10.1002/mus.70136
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  UKC LJ - Ljubljana University Medical Centre
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| Abstract: | Introduction/Aims: Previous ultrasound (US)-based assessments of median nerve (MN) displacement within the carpal tun-nel have shown inconsistent results due to methodological variability. Quantitative data on how different upper-limb movementsaffect MN displacement and shear strain at the wrist remain scarce. This study aimed to quantify MN longitudinal displacementand shear strain during finger, wrist, and elbow movements in healthy individuals to establish normative patterns of nerve glid-ing and deformation.Methods: Twenty healthy subjects (13 females; mean age: 31.9 years, range: 27–36 years) were prospectively recruited. US vid-eos captured MN motion during middle finger, wrist, and elbow movements. A custom robotic device ensured consistent wristmotion and forearm stability. Speckle-tracking software was used to analyze MN absolute longitudinal displacement, relativedisplacement to adjacent deep and superficial tissues, and normalized shear strain at both interfaces.Results: Elbow motion resulted in significantly greater MN absolute displacement (3.8 ± 1.2 mm) and displacement relative todeep tissue (3.6 ± 1.2 mm), compared to finger or wrist motion. No significant differences were observed in MN displacementrelative to superficial tissue across motions. Normalized shear strain at the deep interface was lowest during elbow motion(41.8 ± 16.6 mm−1). Significant differences were found for wrist-to-elbow and finger-to-elbow motions, but not for finger-to-wristmotions.Discussion: Presented findings highlight the importance of joint-specific contributions to MN motion and suggest that proximaljoint movements, such as at the elbow, may promote more effective nerve excursion while minimizing shear strain. This knowl-edge may help refine nerve current mobilization approaches. |
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| Keywords: | dynamic ultrasound, longitudinal displacement, median nerve, shear strain, speckle tracking |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 582-588 |
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| Numbering: | Vol. 73, iss. 4 |
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| PID: | 20.500.12556/DiRROS-27218  |
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| UDC: | 61 |
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| ISSN on article: | 1097-4598 |
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| DOI: | 10.1002/mus.70136 |
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| COBISS.SI-ID: | 266151939 |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 26. 1. 2026;
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| Publication date in DiRROS: | 23.03.2026 |
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| Views: | 44 |
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| Downloads: | 20 |
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