Cargando…
Effects of Simulated Marker Placement Deviations on Running Kinematics and Evaluation of a Morphometric-Based Placement Feedback Method
In order to provide effective test-retest and pooling of information from clinical gait analyses, it is critical to ensure that the data produced are as reliable as possible. Furthermore, it has been shown that anatomical marker placement is the largest source of inter-examiner variance in gait anal...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4713202/ https://www.ncbi.nlm.nih.gov/pubmed/26765846 http://dx.doi.org/10.1371/journal.pone.0147111 |
_version_ | 1782410163140952064 |
---|---|
author | Osis, Sean T. Hettinga, Blayne A. Macdonald, Shari Ferber, Reed |
author_facet | Osis, Sean T. Hettinga, Blayne A. Macdonald, Shari Ferber, Reed |
author_sort | Osis, Sean T. |
collection | PubMed |
description | In order to provide effective test-retest and pooling of information from clinical gait analyses, it is critical to ensure that the data produced are as reliable as possible. Furthermore, it has been shown that anatomical marker placement is the largest source of inter-examiner variance in gait analyses. However, the effects of specific, known deviations in marker placement on calculated kinematic variables are unclear, and there is currently no mechanism to provide location-based feedback regarding placement consistency. The current study addresses these disparities by: applying a simulation of marker placement deviations to a large (n = 411) database of runners; evaluating a recently published method of morphometric-based deviation detection; and pilot-testing a system of location-based feedback for marker placements. Anatomical markers from a standing neutral trial were moved virtually by up to 30 mm to simulate deviations. Kinematic variables during running were then calculated using the original, and altered static trials. Results indicate that transverse plane angles at the knee and ankle are most sensitive to deviations in marker placement (7.59 degrees of change for every 10 mm of marker error), followed by frontal plane knee angles (5.17 degrees for every 10 mm). Evaluation of the deviation detection method demonstrated accuracies of up to 82% in classifying placements as deviant. Finally, pilot testing of a new methodology for providing location-based feedback demonstrated reductions of up to 80% in the deviation of outcome kinematics. |
format | Online Article Text |
id | pubmed-4713202 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-47132022016-01-26 Effects of Simulated Marker Placement Deviations on Running Kinematics and Evaluation of a Morphometric-Based Placement Feedback Method Osis, Sean T. Hettinga, Blayne A. Macdonald, Shari Ferber, Reed PLoS One Research Article In order to provide effective test-retest and pooling of information from clinical gait analyses, it is critical to ensure that the data produced are as reliable as possible. Furthermore, it has been shown that anatomical marker placement is the largest source of inter-examiner variance in gait analyses. However, the effects of specific, known deviations in marker placement on calculated kinematic variables are unclear, and there is currently no mechanism to provide location-based feedback regarding placement consistency. The current study addresses these disparities by: applying a simulation of marker placement deviations to a large (n = 411) database of runners; evaluating a recently published method of morphometric-based deviation detection; and pilot-testing a system of location-based feedback for marker placements. Anatomical markers from a standing neutral trial were moved virtually by up to 30 mm to simulate deviations. Kinematic variables during running were then calculated using the original, and altered static trials. Results indicate that transverse plane angles at the knee and ankle are most sensitive to deviations in marker placement (7.59 degrees of change for every 10 mm of marker error), followed by frontal plane knee angles (5.17 degrees for every 10 mm). Evaluation of the deviation detection method demonstrated accuracies of up to 82% in classifying placements as deviant. Finally, pilot testing of a new methodology for providing location-based feedback demonstrated reductions of up to 80% in the deviation of outcome kinematics. Public Library of Science 2016-01-14 /pmc/articles/PMC4713202/ /pubmed/26765846 http://dx.doi.org/10.1371/journal.pone.0147111 Text en © 2016 Osis et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Osis, Sean T. Hettinga, Blayne A. Macdonald, Shari Ferber, Reed Effects of Simulated Marker Placement Deviations on Running Kinematics and Evaluation of a Morphometric-Based Placement Feedback Method |
title | Effects of Simulated Marker Placement Deviations on Running Kinematics and Evaluation of a Morphometric-Based Placement Feedback Method |
title_full | Effects of Simulated Marker Placement Deviations on Running Kinematics and Evaluation of a Morphometric-Based Placement Feedback Method |
title_fullStr | Effects of Simulated Marker Placement Deviations on Running Kinematics and Evaluation of a Morphometric-Based Placement Feedback Method |
title_full_unstemmed | Effects of Simulated Marker Placement Deviations on Running Kinematics and Evaluation of a Morphometric-Based Placement Feedback Method |
title_short | Effects of Simulated Marker Placement Deviations on Running Kinematics and Evaluation of a Morphometric-Based Placement Feedback Method |
title_sort | effects of simulated marker placement deviations on running kinematics and evaluation of a morphometric-based placement feedback method |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4713202/ https://www.ncbi.nlm.nih.gov/pubmed/26765846 http://dx.doi.org/10.1371/journal.pone.0147111 |
work_keys_str_mv | AT osisseant effectsofsimulatedmarkerplacementdeviationsonrunningkinematicsandevaluationofamorphometricbasedplacementfeedbackmethod AT hettingablaynea effectsofsimulatedmarkerplacementdeviationsonrunningkinematicsandevaluationofamorphometricbasedplacementfeedbackmethod AT macdonaldshari effectsofsimulatedmarkerplacementdeviationsonrunningkinematicsandevaluationofamorphometricbasedplacementfeedbackmethod AT ferberreed effectsofsimulatedmarkerplacementdeviationsonrunningkinematicsandevaluationofamorphometricbasedplacementfeedbackmethod |