Concurrent validity and reliability of a mobile tracking technology to measure angular and linear movements of the neck

Sommer, Bettina; Weisenhorn, Martin; Ernst, Markus; Meichtry, André; Rast, Fabian Marcel; Kleger, Dominik; Schmid, Philipp; Lünenburger, Lars; Bauer, Christoph

doi:10.1016/j.jbiomech.2019.109340

Cited by 8 publications

(4 citation statements)

References 25 publications

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“…The concurrent validity should be assessed by tracking the head position simultaneously with an optoelectronic motion capture system and an IMU system [ 48 ]. Reliability should be addressed in a test retest design [ 37 ]. Following this, the applicability of the model could be tested in a real life situation, such as during office work.…”

Section: Resultsmentioning

confidence: 99%

“…The cervical spine has the largest mobility of all sectors of the human spine. Since the head moves with six degrees of freedom relative to the thorax, the cervical spine has six degrees of freedom [ 17 , 37 , 46 ]. The range of motion differs between directions.…”

Section: Neck Modelmentioning

confidence: 99%

“…Existing IMU models measure the angles of the neck accurately to some extent, but none of these models include an estimate of translation which would be important for the study of forward head postures [ 34 , 35 , 36 ]. In contrast, camera-based systems limit a persons’ range of motion because the person must always act within the field of view of the cameras [ 32 , 34 , 37 ]. A simple biomechanical model of the neck that can estimate translation but is independent of cameras would therefore be of great advantage.…”

Section: Introductionmentioning

confidence: 99%

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A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax

Schmid

Bauer

Ernst

et al. 2021

Sensors

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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.

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Section: Resultsmentioning

confidence: 99%

Section: Neck Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax

Schmid

Bauer

Ernst

et al. 2021

Sensors

Self Cite

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“…A similar design process described in [14] does not contain detailed research on the tracking performance of the prepared device. In turn, [15] described the design of a tracker along with the research, but only the hardware components, without the software design support, of the SteamVR system were considered.…”

Section: Introductionmentioning

confidence: 99%

Metrology and Measurement Systems

Maciejewski,

Piszczek,

Pomianek

et al. 2020

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Virtual reality (VR) has become a realistic alternative to conventional learning methods in numerous fields including military training. Accurate and precise tracking of a user wearing a head-mounted display is necessary to achieve an immersive VR experience. The widely available SteamVR system, where licensed users can design and construct trackers optimized for a given application can be an alternative to very expensive professional motion tracking. This paper presents the complete design process of a SteamVR tracker dedicated to a shooting simulation in a VR environment. We describe the optimization and simulation of the tracker's shape and configuration of the sensors. In the simulation phase the developed model had better parameters than its commercial counterparts. Next, the optimized prototype was constructed and configured. The dedicated and automated measuring arrangement provided experimental verification of the tracker's performance. Tracking performance as well as the accuracy and precision of both position and orientation measurements were determined and compared with simulations, which proved that the simulation software can accurately predict selected properties of the proposed tracker.

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A Reliable and Inexpensive Integration of Virtual Reality and Digital Human Modelling to Estimate Cervical Spine Function

Lopomo

Mosna

Lenzi

et al. 2020

Digital Human Modeling and Applications in Health, Safety, Ergonomics and Risk Management. Posture, Motion and Health

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Concurrent validity and reliability of a mobile tracking technology to measure angular and linear movements of the neck

Cited by 8 publications

References 25 publications

A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax

A Two Joint Neck Model to Identify Malposition of the Head Relative to the Thorax

Metrology and Measurement Systems

A Reliable and Inexpensive Integration of Virtual Reality and Digital Human Modelling to Estimate Cervical Spine Function

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