Cargando…
Assessment of Stability of MIMU Probes to Skin-Marker-Based Anatomical Reference Frames During Locomotion Tasks: Effect of Different Locations on the Lower Limb
Soft tissue artefacts (STAs) undermine the validity of skin-mounted approaches to measure skeletal kinematics. Magneto-inertial measurement units (MIMU) gained popularity due to their low cost and ease of use. Although the reliability of different protocols for marker-based joint kinematics estimati...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8727529/ https://www.ncbi.nlm.nih.gov/pubmed/35004633 http://dx.doi.org/10.3389/fbioe.2021.721900 |
_version_ | 1784626547788873728 |
---|---|
author | Scalera, Giovanni Marco Ferrarin, Maurizio Marzegan, Alberto Rabuffetti, Marco |
author_facet | Scalera, Giovanni Marco Ferrarin, Maurizio Marzegan, Alberto Rabuffetti, Marco |
author_sort | Scalera, Giovanni Marco |
collection | PubMed |
description | Soft tissue artefacts (STAs) undermine the validity of skin-mounted approaches to measure skeletal kinematics. Magneto-inertial measurement units (MIMU) gained popularity due to their low cost and ease of use. Although the reliability of different protocols for marker-based joint kinematics estimation has been widely reported, there are still no indications on where to place MIMU to minimize STA. This study aims to find the most stable positions for MIMU placement, among four positions on the thigh, four on the shank, and three on the foot. Stability was investigated by measuring MIMU movements against an anatomical reference frame, defined according to a standard marker-based approach. To this aim, markers were attached both on the case of each MIMU (technical frame) and on bony landmarks (anatomical frame). For each MIMU, the nine angles between each versor of the technical frame with each versor of the corresponding anatomical frame were computed. The maximum standard deviation of these angles was assumed as the instability index of MIMU-body coupling. Six healthy subjects were asked to perform barefoot gait, step negotiation, and sit-to-stand. Results showed that (1) in the thigh, the frontal position was the most stable in all tasks, especially in gait; (2) in the shank, the proximal position is the least stable, (3) lateral or medial calcaneus and foot dorsum positions showed equivalent stability performances. Further studies should be done before generalizing these conclusions to different motor tasks and MIMU-body fixation methods. The above results are of interest for both MIMU-based gait analysis and rehabilitation approaches using wearable sensors-based biofeedback. |
format | Online Article Text |
id | pubmed-8727529 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-87275292022-01-06 Assessment of Stability of MIMU Probes to Skin-Marker-Based Anatomical Reference Frames During Locomotion Tasks: Effect of Different Locations on the Lower Limb Scalera, Giovanni Marco Ferrarin, Maurizio Marzegan, Alberto Rabuffetti, Marco Front Bioeng Biotechnol Bioengineering and Biotechnology Soft tissue artefacts (STAs) undermine the validity of skin-mounted approaches to measure skeletal kinematics. Magneto-inertial measurement units (MIMU) gained popularity due to their low cost and ease of use. Although the reliability of different protocols for marker-based joint kinematics estimation has been widely reported, there are still no indications on where to place MIMU to minimize STA. This study aims to find the most stable positions for MIMU placement, among four positions on the thigh, four on the shank, and three on the foot. Stability was investigated by measuring MIMU movements against an anatomical reference frame, defined according to a standard marker-based approach. To this aim, markers were attached both on the case of each MIMU (technical frame) and on bony landmarks (anatomical frame). For each MIMU, the nine angles between each versor of the technical frame with each versor of the corresponding anatomical frame were computed. The maximum standard deviation of these angles was assumed as the instability index of MIMU-body coupling. Six healthy subjects were asked to perform barefoot gait, step negotiation, and sit-to-stand. Results showed that (1) in the thigh, the frontal position was the most stable in all tasks, especially in gait; (2) in the shank, the proximal position is the least stable, (3) lateral or medial calcaneus and foot dorsum positions showed equivalent stability performances. Further studies should be done before generalizing these conclusions to different motor tasks and MIMU-body fixation methods. The above results are of interest for both MIMU-based gait analysis and rehabilitation approaches using wearable sensors-based biofeedback. Frontiers Media S.A. 2021-12-22 /pmc/articles/PMC8727529/ /pubmed/35004633 http://dx.doi.org/10.3389/fbioe.2021.721900 Text en Copyright © 2021 Scalera, Ferrarin, Marzegan and Rabuffetti. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Bioengineering and Biotechnology Scalera, Giovanni Marco Ferrarin, Maurizio Marzegan, Alberto Rabuffetti, Marco Assessment of Stability of MIMU Probes to Skin-Marker-Based Anatomical Reference Frames During Locomotion Tasks: Effect of Different Locations on the Lower Limb |
title | Assessment of Stability of MIMU Probes to Skin-Marker-Based Anatomical Reference Frames During Locomotion Tasks: Effect of Different Locations on the Lower Limb |
title_full | Assessment of Stability of MIMU Probes to Skin-Marker-Based Anatomical Reference Frames During Locomotion Tasks: Effect of Different Locations on the Lower Limb |
title_fullStr | Assessment of Stability of MIMU Probes to Skin-Marker-Based Anatomical Reference Frames During Locomotion Tasks: Effect of Different Locations on the Lower Limb |
title_full_unstemmed | Assessment of Stability of MIMU Probes to Skin-Marker-Based Anatomical Reference Frames During Locomotion Tasks: Effect of Different Locations on the Lower Limb |
title_short | Assessment of Stability of MIMU Probes to Skin-Marker-Based Anatomical Reference Frames During Locomotion Tasks: Effect of Different Locations on the Lower Limb |
title_sort | assessment of stability of mimu probes to skin-marker-based anatomical reference frames during locomotion tasks: effect of different locations on the lower limb |
topic | Bioengineering and Biotechnology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8727529/ https://www.ncbi.nlm.nih.gov/pubmed/35004633 http://dx.doi.org/10.3389/fbioe.2021.721900 |
work_keys_str_mv | AT scaleragiovannimarco assessmentofstabilityofmimuprobestoskinmarkerbasedanatomicalreferenceframesduringlocomotiontaskseffectofdifferentlocationsonthelowerlimb AT ferrarinmaurizio assessmentofstabilityofmimuprobestoskinmarkerbasedanatomicalreferenceframesduringlocomotiontaskseffectofdifferentlocationsonthelowerlimb AT marzeganalberto assessmentofstabilityofmimuprobestoskinmarkerbasedanatomicalreferenceframesduringlocomotiontaskseffectofdifferentlocationsonthelowerlimb AT rabuffettimarco assessmentofstabilityofmimuprobestoskinmarkerbasedanatomicalreferenceframesduringlocomotiontaskseffectofdifferentlocationsonthelowerlimb |