A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax
Neck pain is a frequent health complaint. Prolonged protracted malpositions of the head are associated with neck pain and headaches and could be prevented using biofeedback systems. A practical biofeedback system to detect malpositions should be realized with a simple measurement setup. To achieve t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/9/3297 |
| _version_ | 1797534646529949696 |
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| author | Philipp M. Schmid Christoph M. Bauer Markus J. Ernst Bettina Sommer Lars Lünenburger Martin Weisenhorn |
| author_facet | Philipp M. Schmid Christoph M. Bauer Markus J. Ernst Bettina Sommer Lars Lünenburger Martin Weisenhorn |
| author_sort | Philipp M. Schmid |
| collection | DOAJ |
| description | Neck pain is a frequent health complaint. Prolonged protracted malpositions of the head are associated with neck pain and headaches and could be prevented using biofeedback systems. A practical biofeedback system to detect malpositions should be realized with a simple measurement setup. To achieve this, a simple biomechanical model representing head orientation and translation relative to the thorax is introduced. To identify the parameters of this model, anthropometric data were acquired from eight healthy volunteers. In this work we determine (i) the accuracy of the proposed model when the neck length is known, (ii) the dependency of the neck length on the body height, and (iii) the impact of a wrong neck length on the models accuracy. The resulting model is able to describe the motion of the head with a maximum uncertainty of 5 mm only. To achieve this high accuracy the effective neck length must be known a priory. If however, this parameter is assumed to be a linear function of the palpable neck length, the measurement error increases. Still, the resulting accuracy can be sufficient to identify and monitor a protracted malposition of the head relative to the thorax. |
| first_indexed | 2024-03-10T11:33:28Z |
| format | Article |
| id | doaj.art-30d57ae5d40e4dcb956a1ab12f5fe126 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T11:33:28Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-30d57ae5d40e4dcb956a1ab12f5fe1262023-11-21T19:02:29ZengMDPI AGSensors1424-82202021-05-01219329710.3390/s21093297A Two Joint Neck Model to Identify Malposition of the Head Relative to the ThoraxPhilipp M. Schmid0Christoph M. Bauer1Markus J. Ernst2Bettina Sommer3Lars Lünenburger4Martin Weisenhorn5Institute of Signal Processing and Wireless Communications, School of Engineering, Zurich University of Applied Sciences, Technikumstrasse 9, 8400 Winterthur, SwitzerlandInstitute of Physiotherapy, School of Health Professions, Zurich University of Applied Sciences, Katharina-Sulzer-Platz 9, 8400 Winterthur, SwitzerlandInstitute of Physiotherapy, School of Health Professions, Zurich University of Applied Sciences, Katharina-Sulzer-Platz 9, 8400 Winterthur, SwitzerlandInstitute of Physiotherapy, School of Health Professions, Zurich University of Applied Sciences, Katharina-Sulzer-Platz 9, 8400 Winterthur, SwitzerlandHocoma AG, Industriestrasse 4, 8604 Volketswil, SwitzerlandInstitute of Signal Processing and Wireless Communications, School of Engineering, Zurich University of Applied Sciences, Technikumstrasse 9, 8400 Winterthur, SwitzerlandNeck pain is a frequent health complaint. Prolonged protracted malpositions of the head are associated with neck pain and headaches and could be prevented using biofeedback systems. A practical biofeedback system to detect malpositions should be realized with a simple measurement setup. To achieve this, a simple biomechanical model representing head orientation and translation relative to the thorax is introduced. To identify the parameters of this model, anthropometric data were acquired from eight healthy volunteers. In this work we determine (i) the accuracy of the proposed model when the neck length is known, (ii) the dependency of the neck length on the body height, and (iii) the impact of a wrong neck length on the models accuracy. The resulting model is able to describe the motion of the head with a maximum uncertainty of 5 mm only. To achieve this high accuracy the effective neck length must be known a priory. If however, this parameter is assumed to be a linear function of the palpable neck length, the measurement error increases. Still, the resulting accuracy can be sufficient to identify and monitor a protracted malposition of the head relative to the thorax.https://www.mdpi.com/1424-8220/21/9/3297neckprotractionposture monitoringneck painstereophotogrammetrybiomechanical model |
| spellingShingle | Philipp M. Schmid Christoph M. Bauer Markus J. Ernst Bettina Sommer Lars Lünenburger Martin Weisenhorn A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax Sensors neck protraction posture monitoring neck pain stereophotogrammetry biomechanical model |
| title | A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax |
| title_full | A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax |
| title_fullStr | A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax |
| title_full_unstemmed | A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax |
| title_short | A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax |
| title_sort | two joint neck model to identify malposition of the head relative to the thorax |
| topic | neck protraction posture monitoring neck pain stereophotogrammetry biomechanical model |
| url | https://www.mdpi.com/1424-8220/21/9/3297 |
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