Tension of the ulnar, median, and radial nerves during ulnar nerve neurodynamic testing : Observational cadaveric study

Journal article


Manvell, Nicole, Manvell, Joshua, Snodgrass, Suzanne and Reid, Susan. (2015) Tension of the ulnar, median, and radial nerves during ulnar nerve neurodynamic testing : Observational cadaveric study. Physical Therapy. 95(6), pp. 891 - 900. https://doi.org/10.2522/ptj.20130536
AuthorsManvell, Nicole, Manvell, Joshua, Snodgrass, Suzanne and Reid, Susan
Abstract

Background: The ulnar nerve upper limb neurodynamic test (ULNT3) uses upper limb positioning to investigate symptoms arising from the ulnar nerve. It is proposed to selectively increase tension of the nerve; however, this property of the test is not well established. Objective: The aim of this study was to determine the upper limb position that results in: (1) the greatest tension of the ulnar nerve and (2) the greatest difference in tension between the ulnar nerve and the other 2 major nerves of the upper limb: median and radial. Design: This was an observational cadaver study. Methods: Tension (in newtons) of the ulnar, median, and radial nerves was measured simultaneously using 3 buckle force transducers in 5 upper limb positions in 10 embalmed human cadavers (N=20 limbs). Repeated-measures analysis of variance (ANOVA) with Bonferroni post hoc tests determined differences in tension among nerves and among limb positions. Results: The addition of shoulder horizontal abduction (H.Abd; 12.62 N; 95% confidence interval [95% CI]=10.76, 14.47) and combined shoulder abduction and internal rotation (H.Abd+IR; 11.86 N; 95% CI=9.96, 13.77) to ULNT3 (scapular depression, shoulder abduction and external rotation, elbow flexion, forearm pronation, and wrist and finger extension) produced significantly greater ulnar nerve tension compared with the ULNT3 alone (8.71 N; 95% CI=7.25, 10.17). The ULNT3+H.Abd test demonstrated the greatest difference in tension among nerves (mean difference between ulnar and median nerves=11.87 N; 95% CI=9.80, 13.92; mean difference between ulnar and radial nerves=8.47 N; 95% CI=6.41, 10.53). Limitations: These results pertain only to the biomechanical plausibility of the ulnar nerve neurodynamic test and do not account for other factors that may affect the clinical application of this test. Conclusions: The ULNT3+H.Abd is a biomechanically plausible test for detecting peripheral neuropathic pain related to the ulnar nerve. In situations where the shoulder complex will not tolerate the combination of shoulder external rotation in abduction, performing upper limb neurodynamic tests with internal rotation instead of external rotation is a biomechanically plausible alternative.

Year2015
JournalPhysical Therapy
Journal citation95 (6), pp. 891 - 900
ISSN0031-9023
Digital Object Identifier (DOI)https://doi.org/10.2522/ptj.20130536
Open accessOpen access
Page range891 - 900
Research GroupSchool of Allied Health
Publisher's version
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https://acuresearchbank.acu.edu.au/item/89z60/tension-of-the-ulnar-median-and-radial-nerves-during-ulnar-nerve-neurodynamic-testing-observational-cadaveric-study

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