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McMullin P, Emmett D, Gibbons A, Clingo K, Higbee P, Sykes A, Fullwood DT, Mitchell UH, Bowden AE. Dynamic segmental kinematics of the lumbar spine during diagnostic movements. Front Bioeng Biotechnol 2023; 11:1209472. [PMID: 37840657 PMCID: PMC10568473 DOI: 10.3389/fbioe.2023.1209472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 09/15/2023] [Indexed: 10/17/2023] Open
Abstract
Background: In vivo measurements of segmental-level kinematics are a promising avenue for better understanding the relationship between pain and its underlying, multi-factorial basis. To date, the bulk of the reported segmental-level motion has been restricted to single plane motions. Methods: The present work implemented a novel marker set used with an optical motion capture system to non-invasively measure dynamic, 3D in vivo segmental kinematics of the lower spine in a laboratory setting. Lumbar spinal kinematics were measured for 28 subjects during 17 diagnostic movements. Results: Overall regional range of motion data and lumbar angular velocity measurement were consistent with previously published studies. Key findings from the work included measurement of differences in ascending versus descending segmental velocities during functional movements and observations of motion coupling paradigms in the lumbar spinal segments. Conclusion: The work contributes to the task of establishing a baseline of segmental lumbar movement patterns in an asymptomatic cohort, which serves as a necessary pre-requisite for identifying pathological and symptomatic deviations from the baseline.
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Affiliation(s)
- Paul McMullin
- Department of Mechanical Engineering, Brigham Young University, Provo, UT, United States
| | - Darian Emmett
- Department of Mechanical Engineering, Brigham Young University, Provo, UT, United States
| | - Andrew Gibbons
- Department of Mechanical Engineering, Brigham Young University, Provo, UT, United States
| | - Kelly Clingo
- Department of Mechanical Engineering, Brigham Young University, Provo, UT, United States
| | - Preston Higbee
- Department of Exercise Sciences, Brigham Young University, Provo, UT, United States
| | - Andrew Sykes
- Department of Exercise Sciences, Brigham Young University, Provo, UT, United States
| | - David T. Fullwood
- Department of Mechanical Engineering, Brigham Young University, Provo, UT, United States
| | - Ulrike H. Mitchell
- Department of Exercise Sciences, Brigham Young University, Provo, UT, United States
| | - Anton E. Bowden
- Department of Mechanical Engineering, Brigham Young University, Provo, UT, United States
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Zhong X, Liu Y, Faieghi R, Xi F. 3D Biomechanical Modeling for Sitting Contact Stress Analysis. J Biomech Eng 2022; 144:1140976. [PMID: 35546518 DOI: 10.1115/1.4054556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Indexed: 11/08/2022]
Abstract
This paper proposes a 3D biomechanical model of the upper body and analyzes the interaction between the upper body and aircraft seat backrest for different sitting postures and backrest recline angles. The reclined sitting postures of the upper body are defined based on the available spine biomechanical data and the multibody inverse kinematics method. The contact loadings on each contacted spine segment are calculated based on the Newton-Euler dynamic formulation. The backrest contact pressure distribution is simulated using the contact stress theory based on the calculated forces on the backrest. The resultant force and pressure distribution show how the backrest inclination and lateral bending of the trunk affect the backrest loading and contact condition. The simulation results are compared to the experimental measurement for validation, and a good correspondence is found. The parameters, including the average and maximum pressure, pressure standard deviation based on the pressure distribution, are also compared, and the maximum simulation error is 11.5% on the average pressure. Limitations of the model are discussed. The model proposed in this paper can analyze more posture cases than previous studies that focused on the 2D scenarios. The loading and pressure prediction model can be applied for backrest design evaluation and facilitate seat design optimization.
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Affiliation(s)
- Xianzhi Zhong
- Department of Aerospace Engineering, Ryerson University, Toronto, Canada, 350 Victoria Street, Toronto, ON, CA, M5B 2K3
| | - Yuezhi Liu
- Department of Aerospace Engineering, Ryerson University, Toronto, Canada, 350 Victoria Street, Toronto, ON, CA, M5B 2K3
| | - Reza Faieghi
- Department of Aerospace Engineering, Ryerson University, Toronto, Canada, 350 Victoria Street, Toronto, ON, CA, M5B 2K3
| | - Fengfeng Xi
- Department of Aerospace Engineering, Ryerson University, Toronto, Canada, 350 Victoria Street, Toronto, ON, CA, M5B 2K3
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A Dynamic Optimization Approach for Solving Spine Kinematics While Calibrating Subject-Specific Mechanical Properties. Ann Biomed Eng 2021; 49:2311-2322. [PMID: 33851322 DOI: 10.1007/s10439-021-02774-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 03/31/2021] [Indexed: 12/11/2022]
Abstract
This study aims to propose a new optimization framework for solving spine kinematics based on skin-mounted markers and estimate subject-specific mechanical properties of the intervertebral joints. The approach enforces dynamic consistency in the entire skeletal system over the entire time-trajectory while personalizing spinal stiffness. 3D reflective markers mounted on ten vertebrae during spine motions were measured in ten healthy volunteers. Biplanar X-rays were taken during neutral stance of the subjects wearing the markers. Calculated spine kinematics were compared to those calculated using inverse kinematics (IK) and IK with imposed generic kinematic constraints. Calculated spine kinematics compared well with standing X-rays, with average root mean square differences of the vertebral body center positions below 10.1 mm and below [Formula: see text] for joint orientation angles. For flexion/extension and lateral bending, the lumbar rotation distribution patterns, as well as the ranges of rotations matched in vivo literature data. The approach outperforms state-of-art IK and IK with constraints methods. Calculated ratios reflect reduced spinal stiffness in low-resistance zone and increased stiffness in high-resistance zone. The patterns of calibrated stiffness were consistent with previously reported experimentally determined patterns. This approach will further our insight into spinal mechanics by increasing the physiological representativeness of spinal motion simulations.
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Zaltieri M, Massaroni C, Lo Presti D, Bravi M, Sabbadini R, Miccinilli S, Sterzi S, Formica D, Schena E. A Wearable Device Based on a Fiber Bragg Grating Sensor for Low Back Movements Monitoring. SENSORS 2020; 20:s20143825. [PMID: 32659958 PMCID: PMC7411829 DOI: 10.3390/s20143825] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/03/2020] [Accepted: 07/07/2020] [Indexed: 02/02/2023]
Abstract
Low back pain (LBP) is one of the musculoskeletal disorders that most affects workers. Among others, one of the working categories which mainly experiences such disease are video terminal workers. As it causes exploitation of the National Health Service and absenteeism in workplaces, LBP constitutes a relevant socio-economic burden. In such a scenario, a prompt detection of wrong seating postures can be useful to prevent the occurrence of this disorder. To date, many tools capable of monitoring the spinal range of motions (ROMs) are marketed, but most of them are unusable in working environments due to their bulkiness, discomfort and invasiveness. In the last decades, fiber optic sensors have made their mark allowing the creation of light and compact wearable systems. In this study, a novel wearable device embedding a Fiber Bragg Grating sensor for the detection of lumbar flexion-extensions (F/E) in seated subjects is proposed. At first, the manufacturing process of the sensing element was shown together with its mechanical characterization, that shows linear response to strain with a high correlation coefficient (R2 > 0.99) and a sensitivity value (Sε) of 0.20 nm∙mε−1. Then, the capability of the wearable device in measuring F/E in the sagittal body plane was experimentally assessed on a small population of volunteers, using a Motion Capture system (MoCap) as gold standard showing good ability of the system to match the lumbar F/E trend in time. Additionally, the lumbar ROMs were evaluated in terms of intervertebral lumbar distances (ΔdL3−L1) and angles, exhibiting moderate to good agreement with the MoCap outputs (the maximum Mean Absolute Error obtained is ~16% in detecting ΔdL3−L1). The proposed wearable device is the first attempt for the development of FBG-based wearable systems for workers’ safety monitoring.
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Affiliation(s)
- Martina Zaltieri
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.); (D.L.P.); (R.S.)
| | - Carlo Massaroni
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.); (D.L.P.); (R.S.)
| | - Daniela Lo Presti
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.); (D.L.P.); (R.S.)
| | - Marco Bravi
- Unit of Physical Medicine and Rehabilitation, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.B.); (S.M.); (S.S.)
| | - Riccardo Sabbadini
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.); (D.L.P.); (R.S.)
| | - Sandra Miccinilli
- Unit of Physical Medicine and Rehabilitation, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.B.); (S.M.); (S.S.)
| | - Silvia Sterzi
- Unit of Physical Medicine and Rehabilitation, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.B.); (S.M.); (S.S.)
| | - Domenico Formica
- Unit of Neurophysiology and Neuroengineering of HumanTechnology Interaction, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy;
| | - Emiliano Schena
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.); (D.L.P.); (R.S.)
- Correspondence:
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The Nightingale Award 2008. Med Biol Eng Comput 2009. [PMCID: PMC2763175 DOI: 10.1007/s11517-009-0536-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Ma HT, Griffith JF, Yang Z, Kwok AWL, Leung PC, Lee RYW. Kinematics of the lumbar spine in elderly subjects with decreased bone mineral density. Med Biol Eng Comput 2009; 47:783-9. [DOI: 10.1007/s11517-009-0493-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Accepted: 04/17/2009] [Indexed: 11/28/2022]
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Ting Ma H, Griffith JF, Yang Z, Kwok AWL, Leung PC, Lee RYW. Effect of vertebral morphology on lumbar kinematics in elderly subjects with decreased bone mineral density. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2008; 2008:883-886. [PMID: 19162798 DOI: 10.1109/iembs.2008.4649295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Correlation between kinematics and morphological characteristics of lumbar spine was studied in subjects with varying bone mineral density. Effect of morphological characteristics and bone mineral density on the lumbar spine movement was investigated. Morphology parameters were measured from radiographs and a high-frequency motion tracking device were employed to detect surface movement of lumbar spine. Multiple regression analysis identified factors influencing lumbar kinematics while ANOVA examined differences in morphology with normal bone mineral density, osteopenia and osteoporosis. The results show that morphological characteristics, such as wedging deformity, are indeed influential to the kinematics. Related to our previous report, abnormal lumbar kinematic pattern in the subjects with osteoporosis, this study shows although morphological characteristics were found significantly different among normal, osteopenia, and osteoporosis subjects, the change in lumbar kinematic pattern could not be fully explained by the altered vertebral or disc morphology.
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Affiliation(s)
- Heather Ting Ma
- Jockey Club Centre for Osteoporosis Care and Control, The Chinese University of Hong Kong, Shatin, Hong Kong.
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