Estimation of lumbar load by 2D reconstruction of spine line using wearable sensor system

Tsuchiya, Yoshio; Matsuo, Yoshikazu; Tanaka, Takayuki

doi:10.1109/smc.2014.6974500

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…However, the precision of these techniques depends on the estimated precision of parameters of human components (e.g., joint position, the center of gravity position, or the moment arm), most of which include uncertain elements. In recent years, a method of estimating lumbar burden by measuring changes in the curvature of the body surface on the lower back has been proposed (Shibata et al, 2012;Tsuchiya et al, 2014). Shibata et al (2012) estimated the lumbar burden from the changes in lumbar spine interval as fitting lumbar to a circular arc, and Tsuchiya et al (2014) proposed an estimation model of the lumbar burden by modeling lumbar spine alignment and upper body with a segmented model.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, a method of estimating lumbar burden by measuring changes in the curvature of the body surface on the lower back has been proposed (Shibata et al, 2012;Tsuchiya et al, 2014). Shibata et al (2012) estimated the lumbar burden from the changes in lumbar spine interval as fitting lumbar to a circular arc, and Tsuchiya et al (2014) proposed an estimation model of the lumbar burden by modeling lumbar spine alignment and upper body with a segmented model. However, the model proposed by Shibata et al (2012) is not based on mechanics, whereas that of Tsuchiya et al (2014) is, but it can be regarded as an extension of the link segmented model and requires a moment arm.…”

Section: Introductionmentioning

confidence: 99%

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Concept of mathematical modeling of lumbar and thoracic spine based on elastic beam theory

Kudo

Yamada

Xiang

et al. 2022

JBSE

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Modeling of the human spine is important for establishing quantitative assessment methods of low back pain (LBP) caused by manual material handling (MMH). This study developed mathematical models of the lumbar and thoracic spine based on the elastic beam theory. Two types of models, uniform and non-uniform, were derived. First, to simplify the Bernoulli-Euler beam theory, three assumptions were introduced for the uniform beam model: (i) the vertebrae and intervertebral disc were considered as a composite material, (ii) constant crosssectional area, and (iii) conversion of muscular strength to bending moment. However, on fitting to the actual spine position data from the literature, the uniform beam model was found to be unable to reproduce the spine shape, particularly in the lumbar region. Therefore, the non-uniform beam model was derived by removing assumption (ii), which does not agree with the actual human spine profile. Consequently, the spine was modeled as a trapezoid from around S1 to C7 in the sagittal plane, by adjusting the proportionality factor of trapezoid via tapering or widening, and the non-uniform beam model was found to better reproduce the spine shape, including the lumbar region. The model has practicability, such as estimation of spine shape; however, the proportionality factor that was used to reproduce the spine shape did not agree with the actual human spine profile; further theoretical development has been left as future work.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Concept of mathematical modeling of lumbar and thoracic spine based on elastic beam theory

Kudo

Yamada

Xiang

et al. 2022

JBSE

View full text Add to dashboard Cite

show abstract

“…However, these methods are restricted in terms of measurement space, so they are not easy to perform in practice. We previously investigated internal information by examining changes in the shape of the skin during anterior-posterior bending using a wearable sensor system that measures lumbar spine alignment to estimate lumbar load [12,13]. To use this system regardless of the physique of the person being measured, we analyzed anatomical changes in the shape of the epidermis and the size of the lumbosacral region according to physique and posture.…”

Section: Introductionmentioning

confidence: 99%

Relationship between Upper Body Posture Angle and Vertebral Body Posture Angle in Lateral Flexion and Rotation Posture

Tsuchiya

Tanaka

Kamishima

2020

ABE

Self Cite

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Lumbar loading causes increased intervertebral pressure and is an important factor in low back pain. However, it is dif cult to quantitatively judge the actions that affect lumbar load and the magnitude of lumbar load increase. Low back pain occurs not only in the workplace but also during activities of daily living. Therefore, it is necessary to investigate the factors inducing low back pain by measuring movements in various planes and determining the magnitude of the lumbar load. Accordingly, the lumbar spine should be examined during various movements. Several studies have examined vertebral bodies in the ante exion posture. However, the relationship between body exion angle and vertebral body angle during lateral exion and rotation remains unknown. In this study, we proposed an estimation method for changes in vertebral body angle during lateral exion and rotation in the lumbosacral region using a wearable sensor system we previously developed. The accuracy of the proposed estimation method was evaluated and demonstrated using X-ray images.

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Commercial and Research-Based Wearable Devices in Spinal Postural Analysis: A Systematic Review

Pourshahrokhi,

Sun,

Asadipour

2024

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Estimation of lumbar load by 2D reconstruction of spine line using wearable sensor system

Cited by 6 publications

References 8 publications

Concept of mathematical modeling of lumbar and thoracic spine based on elastic beam theory

Concept of mathematical modeling of lumbar and thoracic spine based on elastic beam theory

Relationship between Upper Body Posture Angle and Vertebral Body Posture Angle in Lateral Flexion and Rotation Posture

Commercial and Research-Based Wearable Devices in Spinal Postural Analysis: A Systematic Review

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