A study to determine whether within-subject differences exist between limbs in the upper extremity (UE) component of neurodynamic tests of the median, radial, and ulnar nerves found that between-limb values have low correlation and that it may be normal for an individual to have range of motion differences between limbs with neurodynamic tests.
Researchers examined 61 healthy participants. Difference between limbs for the median nerve-biased test was significant. There was no significant difference between limbs for the radial or ulnar nerve-biased tests. Correlation between limbs was poor for all tests (median r(2) = 0.14; radial r(2) = 0.20; ulnar r(2) = 0.13). Lower-bound scores were calculated to determine the amount of difference needed to consider asymmetry beyond measurement error. The scores for each neurodynamic test were median 27°, radial 20°, and ulnar 21°.
APTA member Laura G. Covill, PT, DPT, OCS, is the lead author of this article, which is published in Physiotherapy Theory and Practice. APTA member Shannon M. Petersen, PT, DScPT, OCS, is coauthor.
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