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Ecological Momentary Assessment of Head Motion: Toward Normative Data of Head Stabilization

Head stabilization is fundamental for balance during locomotion but can be impaired in elderly or diseased populations. Previous studies have identified several parameters of head stability with possible diagnostic value in a laboratory setting. Recently, the ecological validity of measures obtained...

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Autores principales: Hausamann, Peter, Daumer, Martin, MacNeilage, Paul R., Glasauer, Stefan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6558158/
https://www.ncbi.nlm.nih.gov/pubmed/31214001
http://dx.doi.org/10.3389/fnhum.2019.00179
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author Hausamann, Peter
Daumer, Martin
MacNeilage, Paul R.
Glasauer, Stefan
author_facet Hausamann, Peter
Daumer, Martin
MacNeilage, Paul R.
Glasauer, Stefan
author_sort Hausamann, Peter
collection PubMed
description Head stabilization is fundamental for balance during locomotion but can be impaired in elderly or diseased populations. Previous studies have identified several parameters of head stability with possible diagnostic value in a laboratory setting. Recently, the ecological validity of measures obtained in such controlled contexts has been called into question. The aim of this study was to investigate the ecological validity of previously described parameters of head stabilization in a real-world setting. Ten healthy subjects participated in the study. Head and trunk movements of each subject were recorded with inertial measurement units (IMUs) for a period of at least 10 h. Periods of locomotion were extracted from the measurements and predominant frequencies, root mean squares (RMSs) and bout lengths were estimated. As parameters of head stabilization, attenuation coefficients (ACs), harmonic ratios (HRs), coherences, and phase differences were computed. Predominant frequencies were distributed tightly around 2 Hz and ACs, HRs, and coherences exhibited the highest values in this frequency range. All head stability parameters exhibited characteristics consistent with previous reports, although higher variances were observed. These results suggest that head stabilization is tuned to the 2 Hz fundamental frequency of locomotion and that previously described measures of head stability could generalize to a real-world setting. This is the first study to address the ecological validity of these measures, highlighting the potential use of head stability parameters as diagnostic tools or outcome measures for clinical trials. The low cost and ease of use of the IMU technology used in this study could additionally be of benefit for a clinical application.
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spelling pubmed-65581582019-06-18 Ecological Momentary Assessment of Head Motion: Toward Normative Data of Head Stabilization Hausamann, Peter Daumer, Martin MacNeilage, Paul R. Glasauer, Stefan Front Hum Neurosci Neuroscience Head stabilization is fundamental for balance during locomotion but can be impaired in elderly or diseased populations. Previous studies have identified several parameters of head stability with possible diagnostic value in a laboratory setting. Recently, the ecological validity of measures obtained in such controlled contexts has been called into question. The aim of this study was to investigate the ecological validity of previously described parameters of head stabilization in a real-world setting. Ten healthy subjects participated in the study. Head and trunk movements of each subject were recorded with inertial measurement units (IMUs) for a period of at least 10 h. Periods of locomotion were extracted from the measurements and predominant frequencies, root mean squares (RMSs) and bout lengths were estimated. As parameters of head stabilization, attenuation coefficients (ACs), harmonic ratios (HRs), coherences, and phase differences were computed. Predominant frequencies were distributed tightly around 2 Hz and ACs, HRs, and coherences exhibited the highest values in this frequency range. All head stability parameters exhibited characteristics consistent with previous reports, although higher variances were observed. These results suggest that head stabilization is tuned to the 2 Hz fundamental frequency of locomotion and that previously described measures of head stability could generalize to a real-world setting. This is the first study to address the ecological validity of these measures, highlighting the potential use of head stability parameters as diagnostic tools or outcome measures for clinical trials. The low cost and ease of use of the IMU technology used in this study could additionally be of benefit for a clinical application. Frontiers Media S.A. 2019-06-04 /pmc/articles/PMC6558158/ /pubmed/31214001 http://dx.doi.org/10.3389/fnhum.2019.00179 Text en Copyright © 2019 Hausamann, Daumer, MacNeilage and Glasauer. http://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 Neuroscience
Hausamann, Peter
Daumer, Martin
MacNeilage, Paul R.
Glasauer, Stefan
Ecological Momentary Assessment of Head Motion: Toward Normative Data of Head Stabilization
title Ecological Momentary Assessment of Head Motion: Toward Normative Data of Head Stabilization
title_full Ecological Momentary Assessment of Head Motion: Toward Normative Data of Head Stabilization
title_fullStr Ecological Momentary Assessment of Head Motion: Toward Normative Data of Head Stabilization
title_full_unstemmed Ecological Momentary Assessment of Head Motion: Toward Normative Data of Head Stabilization
title_short Ecological Momentary Assessment of Head Motion: Toward Normative Data of Head Stabilization
title_sort ecological momentary assessment of head motion: toward normative data of head stabilization
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6558158/
https://www.ncbi.nlm.nih.gov/pubmed/31214001
http://dx.doi.org/10.3389/fnhum.2019.00179
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