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Different nerve-gliding exercises induce different magnitudes of median nerve longitudinal excursion: an in vivo study using dynamic ultrasound imaging

journal contribution
posted on 2023-06-08, 12:56 authored by Michel W Coppieters, Alan D Hough, Andrew DilleyAndrew Dilley
STUDY DESIGN Controlled laboratory study using single-group, within-subject comparisons. OBJECTIVES To determine in an in vivo study whether different types of nerve-gliding exercises are associated with different amounts of longitudinal nerve excursion. BACKGROUND Different types of nerve-gliding exercises have been proposed. It is assumed that different exercises produce different amounts of excursion and strain in the peripheral nervous system. Although this has been confirmed in cadaveric experiments, in vivo studies are lacking. METHODS High-resolution ultrasound was used to measure longitudinal excursion of the median nerve in the upper arm during 6 different nerve-gliding exercises. Nerve mobilization techniques that involved the elbow and neck were evaluated in 15 asymptomatic volunteers (mean +/- SD age, 30 +/- 8 years). Nerve longitudinal excursion was calculated using a frame-by-frame cross-correlation analysis. A repeated-measures analysis of variance was used to analyze the data. RESULTS Different exercises induced different amounts of longitudinal nerve excursion (P<.0001). The "sliding technique" was associated with the largest excursion (mean +/- SD, 10.2 +/- 2.8 mm; P = .0001). The amount of nerve movement associated with the "tensioning technique" (mean +/- SD, 1.8 +/- 4.0 mm) was smaller than the nerve excursion induced with individual movements of the neck or elbow (mean +/- SD range, -3.4 +/- 0.9 to 5.6 +/- 2.1 mm; P = .0001). CONCLUSION These findings confirm that different types of neurodynamic techniques have different mechanical effects on the nervous system. Recognition of these differences may assist in the selection of treatment techniques. Having demonstrated differences in mechanical effects, future research will have to evaluate whether these different techniques are also associated with different physiological and therapeutic effects.

History

Publication status

  • Published

Journal

Journal of Orthopaedic and Sports Physical Therapy

ISSN

1938-1344

Publisher

Lippincott, Williams & Wilkins

Issue

3

Volume

39

Page range

164-171

Department affiliated with

  • Clinical and Experimental Medicine Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-11-01

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