Alignment of centers of mass of body segments with the gravity line

Amabile, Célia; Nérot, Agathe; Choisne, Julie; Pillet, Hélène; Lafage, Virginie; Skalli, Wafa

doi:10.1080/10255842.2015.1069547

Cited by 4 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pioneering work of Duval Beaup ere et al has shown the relevance of spine and body balance when characterizing scoliosis [3]. More recently, the analysis of gravitational parameters such as the gravity line or the center of mass (COM) could be obtained from biplanar radiographs by estimating the mass distribution in different regions of the body to evaluate its segmental balance [4]. These estimations were obtained using force platform in standing position [5,6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Center of Mass and Gravity-Induced Vertebral Axial Torque on the Scoliotic Spine by Barycentremetry

et al. 2019

View full text Add to dashboard Cite

Study Design: Retrospective observational study. Objectives: To determine the mass distribution along the scoliotic trunk using barycentremetry and its relationship with vertebral axial rotation and torque. Summary of the Background Data: Deformity progression in adolescent idiopathic scoliosis (AIS) is not yet fully understood, but gravity load on the spine could play a role. Barycentremetry allows to characterize body mass distribution in standing position, which could provide a better understanding the mechanisms of progression. Methods: 81 subjects (27 healthy adolescents and 53 AIS patients) underwent biplanar radiography and 3D reconstruction of the spine and body envelope. Position of the gravity line was estimated, as well as trunk segmental centers of mass COMs at each vertebral level and resulting axial torques to each vertebra. Results: The COM of all trunk segments was less than 1 cm from the gravity line in the frontal plane for healthy subjects, and less than 1.5 cm for AIS patients. Vertebral axial torque was 0.7 AE 0.5 Nm in healthy subjects, 2.9 AE 2.1 Nm at the junctional vertebrae of AIS patients and 0.5 AE 0.5 at the apex. A strong association was found between high torque and high intervertebral rotation at junctions, with low torque and low intervertebral axial rotation at the apex. Conclusion: Results suggest that AIS patients can maintain the COM of each body segment close to their gravity line, irrespective of the severity and asymmetry of their deformity. Moreover, torque analysis shed some light on the importance of junctional vertebrae in the spinal deformity and, potentially, in the vicious cycle determining scoliosis progression. Level of Evidence: Level III.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Methods were proposed to obtain the patient's external envelope in standing position from biplanar radiographs [9]. It has been shown that with such methods, it is possible to accurately estimate the position of body COM both in healthy and scoliotic patients by estimating the density of each body segment [4,10].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Center of Mass and Gravity-Induced Vertebral Axial Torque on the Scoliotic Spine by Barycentremetry

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The individuals having Sway back posture present with anterior balance strategy as they have anteriorly swayed pelvis in reference to Plumb line. C. Amabile et al [20] studied the sagittal alignment of centers of mass of body segments with the gravity line in asymptomatic young adults by using a bi-planar X-ray system combined with 3D reconstruction of the external body shape for computation of the body segments Center of Mass (COM). The segments superior to femoral heads were found to be anterior to the Gravity Line.…”

Section: Discussionmentioning

confidence: 99%

Association of Anthropometric Characteristics to Static Sagittal Postural Balance Strategy in Healthy Young Adults

Vats¹,

Meena²

2017

International Journal of Therapies and Rehabilitation Research

View full text Add to dashboard Cite

Background and purpose: Associations of a positive sagittal postural imbalance with pain, physical disability and reduced health-related quality of life have emerged as the predictor of clinical symptoms. Limits of postural stability in sagittal standing are set by mechanical factors that include both individual and environmental characteristics. The variability of individual anthropometric characteristics and body dimensions may be considered to affect the selection of motor strategies that people use to maintain standing balance control. The purpose of the present study is to evaluate the association of anthropometric characteristics with static sagittal postural balance strategy in healthy young adults Methodology: Total of 239 healthy under graduate collegiate students aged 18-25 years were randomly screened. Individual's anthropometric characteristics were measured in accordance with ISAK standards. The Indices of BMI (Kg/m 2 ), upper body height to lower body height ratio (UBH/LBH ratio); waist to hip circumference ratio (WC/HC ratio); bi-acromial to bi-iliocristal width ratio (BA/BI ratio) were calculated. Static sagittal postural Balance strategy (Anterior; neutral; posterior) was analyzed using lateral postural analysis. Individual anthropometric characteristics were compared among the three types of sagittal postural balance strategy. Results: Gender specific analysis revealed that the anthropometric characteristics like weight (WT); BMI; WC; HC and BI in females are significantly associated with the shift of neutral balance strategy towards the sagittal posterior direction whereas anterior strategy, being most prevalent in both the genders is not associated with any anthropometric characteristics. Conclusions: Higher BMI; weight; biacromial width (BA); waist (WC) and hip circumference (HC) were the significant determinants of sagittal posterior balance strategy among female adults. We suggest that assessment of an individuals anthropometric characteristics and adopted sagittal standing postural strategy in clinical set up can improve the insight in designing the therapeutic strategies by directing the intervention approach towards the modifiable body characteristics.

show abstract

“…Particularly, reconstruction of the external envelope associated with density models allows an estimation of mass and the centre of mass of each body segment (Amabile et al, 2016). Computation of the barycentre of the body segment above a given joint allows estimation of the gravitational load taking into account subject-specific posture (Amabile et al, 2015). The clinical relevance of this barycentremetric approach has been assessed in the study of idiopathic scoliosis (Thenard et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Personalised gravitational loading of the cervical spine from biplanar X-rays for asymptomatic and clinical subjects in neutral standing position

Muth-Seng¹,

Huneidi²,

Heidsieck³

et al. 2022

Clinical Biomechanics

View full text Add to dashboard Cite

Alignment of centers of mass of body segments with the gravity line

Abstract: a arts et metiers paristech, lBm/institut de Biomecanique humaine georges Charpak, paris, France; b department of orthopedic surgery, nYu hospital for Joint diseases, new York, nY, usa; c umr_t9406, lBmC laboratoire de Biomécanique et mécanique des Chocs, iFsttar, Bron, France

Cited by 4 publications

References 5 publications

Analysis of Center of Mass and Gravity-Induced Vertebral Axial Torque on the Scoliotic Spine by Barycentremetry

Analysis of Center of Mass and Gravity-Induced Vertebral Axial Torque on the Scoliotic Spine by Barycentremetry

Association of Anthropometric Characteristics to Static Sagittal Postural Balance Strategy in Healthy Young Adults

Personalised gravitational loading of the cervical spine from biplanar X-rays for asymptomatic and clinical subjects in neutral standing position

Contact Info

Product

Resources

About