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Achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report

The triceps surae primarily acts as plantarflexor of the ankle joint. However, the group also causes inversion and eversion at the subtalar joint. Despite this, the Achilles tendon moment arm is generally measured without considering the potential influence of inversion/eversion of the foot during p...

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Autores principales: Wolfram, Susann, Morse, Christopher I., Winwood, Keith L., Hodson-Tole, Emma, McEwan, Islay M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5792916/
https://www.ncbi.nlm.nih.gov/pubmed/29410839
http://dx.doi.org/10.1098/rsos.171358
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author Wolfram, Susann
Morse, Christopher I.
Winwood, Keith L.
Hodson-Tole, Emma
McEwan, Islay M.
author_facet Wolfram, Susann
Morse, Christopher I.
Winwood, Keith L.
Hodson-Tole, Emma
McEwan, Islay M.
author_sort Wolfram, Susann
collection PubMed
description The triceps surae primarily acts as plantarflexor of the ankle joint. However, the group also causes inversion and eversion at the subtalar joint. Despite this, the Achilles tendon moment arm is generally measured without considering the potential influence of inversion/eversion of the foot during plantarflexion. This study investigated the effect of foot inversion and eversion on the plantarflexion Achilles tendon moment arm. Achilles tendon moment arms were determined using the centre-of-rotation method in magnetic resonance images of the left ankle of 11 participants. The foot was positioned at 15° dorsiflexion, 0° or 15° plantarflexion using a Styrofoam wedge. In each of these positions, the foot was either 10° inverted, neutral or 10° everted using an additional Styrofoam wedge. Achilles tendon moment arm in neutral foot position was 47.93 ± 4.54 mm and did not differ significantly when the foot was positioned in 10° inversion and 10° eversion. Hence, inversion/eversion position of the foot may not considerably affect the length of the Achilles tendon moment arm. This information could be useful in musculoskeletal models of the human lower leg and foot and when estimating Achilles tendon forces during plantarflexion with the foot positioned in inversion or eversion.
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spelling pubmed-57929162018-02-06 Achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report Wolfram, Susann Morse, Christopher I. Winwood, Keith L. Hodson-Tole, Emma McEwan, Islay M. R Soc Open Sci Biology (Whole Organism) The triceps surae primarily acts as plantarflexor of the ankle joint. However, the group also causes inversion and eversion at the subtalar joint. Despite this, the Achilles tendon moment arm is generally measured without considering the potential influence of inversion/eversion of the foot during plantarflexion. This study investigated the effect of foot inversion and eversion on the plantarflexion Achilles tendon moment arm. Achilles tendon moment arms were determined using the centre-of-rotation method in magnetic resonance images of the left ankle of 11 participants. The foot was positioned at 15° dorsiflexion, 0° or 15° plantarflexion using a Styrofoam wedge. In each of these positions, the foot was either 10° inverted, neutral or 10° everted using an additional Styrofoam wedge. Achilles tendon moment arm in neutral foot position was 47.93 ± 4.54 mm and did not differ significantly when the foot was positioned in 10° inversion and 10° eversion. Hence, inversion/eversion position of the foot may not considerably affect the length of the Achilles tendon moment arm. This information could be useful in musculoskeletal models of the human lower leg and foot and when estimating Achilles tendon forces during plantarflexion with the foot positioned in inversion or eversion. The Royal Society Publishing 2018-01-10 /pmc/articles/PMC5792916/ /pubmed/29410839 http://dx.doi.org/10.1098/rsos.171358 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Biology (Whole Organism)
Wolfram, Susann
Morse, Christopher I.
Winwood, Keith L.
Hodson-Tole, Emma
McEwan, Islay M.
Achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report
title Achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report
title_full Achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report
title_fullStr Achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report
title_full_unstemmed Achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report
title_short Achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report
title_sort achilles tendon moment arm in humans is not affected by inversion/eversion of the foot: a short report
topic Biology (Whole Organism)
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5792916/
https://www.ncbi.nlm.nih.gov/pubmed/29410839
http://dx.doi.org/10.1098/rsos.171358
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