Reduced longitudinal excursion of the median nerve in carpal tunnel syndrome

Hough, A., Moore, A.P. and Jones, M. (2007) Reduced longitudinal excursion of the median nerve in carpal tunnel syndrome Archives of Physical Medicine and Rehabilitation, 88 (5). pp. 569-576. ISSN 0003-9993

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Abstract

To determine if longitudinal excursion of the median nerve is reduced in patients with carpal tunnel syndrome (CTS). Design Case-control study. Setting University human movement laboratory. Participants Nineteen patients with CTS (8 men, 11 women; mean age, 57±15y), and 37 healthy controls (8 men, 29 women; mean age, 48±10y). Interventions Not applicable. Main Outcome Measures Longitudinal excursion of the median nerve, and the ratio of nerve to flexor digitorum superficialis tendon excursion at the carpal tunnel evoked by finger extension. Measurements were taken using a validated Doppler ultrasound technique, and tests were conducted with the elbow positioned in extension and flexion. Results Mean longitudinal excursion of the median nerve was significantly greater in controls (11.2±2.8mm) than patients (8.3±2.6mm) with the elbow extended (P=.013), but not with the elbow flexed (controls, 12.5±2.5mm; patients, 10.2±3.1mm; P=.089). Mean nerve/tendon excursion ratios were significantly greater in controls (.32±.07) than patients (.23±.06), with the elbow extended (P<.001), and flexed (controls, .36±.06; patients, .28±.10; P=.019). Discriminant analysis identified that 11 (58%) of the 19 patients and 3 (8%) of the 37 controls showed a nerve/tendon excursion ratio of .25 or less when tested with the elbow in extension. Conclusions Reduced longitudinal excursion of the median nerve at the carpal tunnel was identified in a substantial proportion of patients with CTS. Further studies are merited to determine if reduced median nerve excursion at the carpal tunnel is clinically relevant in CTS, and can be influenced by movement-based interventions.

Item Type: Journal article
Uncontrolled Keywords: Carpal tunnel syndrome; Median nerve; Rehabilitation; Ultrasonography, Doppler
Subjects: B000 Health Professions > B600 Health Research
DOI (a stable link to the resource): 10.1016/j.apmr.2007.02.015
Faculties: Faculty of Health and Social Sciences > School of Health Professions
Depositing User: editor health
Date Deposited: 03 Sep 2007
Last Modified: 23 Oct 2014 09:22
URI: http://eprints.brighton.ac.uk/id/eprint/2519

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