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Gepubliceerd in: Journal of Foot and Ankle Research 1/2012

Open Access 01-12-2012 | Oral presentation

Measurement of longitudinal tibial nerve excursion during ankle joint dorsiflexion: an in-vivo investigation with ultrasound imaging

Auteurs: Matthew Carroll, Janet Yau, Keith Rome, Wayne Hing

Gepubliceerd in: Journal of Foot and Ankle Research | bijlage 1/2012

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Background

A key mechanical function of peripheral nerves is their ability to slide in relation to the surrounding tissues. This function is of paramount importance to maintain ideal neural function [1]. Advances in ultrasound imaging and the development of specific software (cross-correlation analysis) have made it possible to analyse real-time ultrasound images, allowing for quantification of in-vivo peripheral nerve movement [2]. Cross-correlation analysis has been utilised in numerous upper extremity in-vivo neural investigations [35]. No study has investigated in-vivo longitudinal nerve excursion at the ankle joint. The aims of this study were to quantify the degree of longitudinal tibial nerve excursion as the ankle moved from dorsiflexion to plantarflexion and assess the between session intra-rater reliability of the ultrasound imaging technique.

Materials and methods

A sample of sixteen participants (10 male, 6 female; mean [SD] age 34.7 [9.3] years old) were recruited. A three second video loop of the tibial nerve was captured by ultrasound imaging as the ankle moved from 20° plantarflexion to 10° dorsiflexion. The tibial nerve was imaged on two occasions with a 5 minute interval between measurement sessions. Foot and ankle position was standardised on a measurement platform. Video loops were analysed to determine the degree of longitudinal nerve excursion. Intraclass correlation coefficients (ICC), with 95% confidence intervals (CI), standard error of the measurement (SEM) and the smallest real difference (SRD) were calculated as an indication of reliability and measurement error.

Results

Results demonstrated mean [SD] longitudinal excursion of 3.01 [0.97] mm. The between session intra-rater reliability was excellent (ICC=0.93; 95% CI, 0.70-0.96), with SEM, 0.26mm and a mean SRD of 0.75mm.

Conclusions

Ultrasound imaging in conjunction with cross correlation analysis presents a reliable technique to quantify in-vivo tibial nerve movement during ankle joint dorsiflexion.
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://​creativecommons.​org/​licenses/​by/​2.​0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Literatuur
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Metagegevens
Titel
Measurement of longitudinal tibial nerve excursion during ankle joint dorsiflexion: an in-vivo investigation with ultrasound imaging
Auteurs
Matthew Carroll
Janet Yau
Keith Rome
Wayne Hing
Publicatiedatum
01-12-2012
Uitgeverij
BioMed Central
Gepubliceerd in
Journal of Foot and Ankle Research / Uitgave bijlage 1/2012
Elektronisch ISSN: 1757-1146
DOI
https://doi.org/10.1186/1757-1146-5-S1-O37

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