• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Institut de Biomécanique Humaine Georges Charpak (IBHGC)
  • View Item
  • Home
  • Institut de Biomécanique Humaine Georges Charpak (IBHGC)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Motion analysis of the seated posture on auto automotive prototype seat

Communication sans acte
Author
TOUBIANA MEYER, Rivka
BAUDU, Samuel
ccSANDOZ, Baptiste
ccLAPORTE, Sébastien
99538 Laboratoire de biomécanique [LBM]

URI
http://hdl.handle.net/10985/10191
Date
2015

Abstract

1. Introduction In automotive industry, by the past, postural comfort was generally predicted through pressure distribution [Mergl, 2005; Zenk, 2007]. Measuring the joint angles, for the automotive sitting comfort, becomes a new investigation field [Schmidt, 2014]. The aim of this study is to evaluate the reproducibility of sitting movement. 2. Methods Six asymptomatic volunteers (mean: 26yo, 1.74m, 69kg), without back pain, participated in this study. The volunteers sat on a normative prototype seat as Robbins et al (1983). The footrest was placed in order to have a thigh angle of 15°. Participants were asked to successively sit 20 times during 3 phases (for a total of 60). The 2 first phases took place in the same day (morning and afternoon) and the third phase took place in the coming month. Motion capture was made with an opto-electronic system Vicon at 100 Hz. The whole body was equipped with 29 retroreflective markers placed on specific anatomical landmarks and technical plates. Anatomical frames, segmental and articular kinematics of the lower limbs (hip), the pelvis and the trunk were computed according to Pillet et al (2010). Flexion/extension, lateral bending and axial rotation were calculated for trunk and pelvis. Lateral bending and axial rotation were used to confirm that the movement was plane. For the flexion-extension, the variation between the beginning and the end of the movement was measured. The reproducibility was evaluated by Mann-Whitney test. 3. Results Axial rotation and lateral bending can be considered as negligible. Indeed, the standard deviation (SD) is less than 2.5°. For the flexion/extension, the volunteers are repeatable during a phase. For the trunk, 3 volunteers are reproducible for the 3 phases. One volunteer is reproducible between the 2 first phases. And 2 volunteers are not reproducible. For the pelvis, only 2 volunteers are reproducible between 2 phases: phase 1 and phase 3 or phase 2 and phase 3. The others are not reproducible. 4. Discussion According to the variation of axial rotation and lateral bending, the movement is considered to be plane. As expected, the pelvic anteversion is observed during the movement. For the reproducibility study, the results show that volunteers do not sit in the same way for the 3 phases. These preliminary results quantified the movement during sitting. More volunteers currently increase the number of experimentations.

Files in this item

Name:
LBM_ESB_2015_TOUBIANA.pdf
Size:
479.7Kb
Format:
PDF
View/Open

Collections

  • Institut de Biomécanique Humaine Georges Charpak (IBHGC)

Related items

Showing items related by title, author, creator and subject.

  • Parametric finite element modeling of the thoracic spine. Geometry and mesh evaluations. 
    Communication sans acte
    TOUBIANA MEYER, Rivka; LAVILLE, Aurélien; BAUDU, Samuel; ccSANDOZ, Baptiste; ccSKALLI, Wafa; ccLAPORTE, Sébastien (2014)
    Introduction Vertebrae present a wide interindividual variability, with a shape strongly dependent on the vertebral level. Based on a previous validated “parametric and subject-specific modeling” (PSSM) method (Laville et ...
  • Non-invasive assessment of human multifidus muscle stiffness using ultrasound shear wave elastography: A feasibility study 
    Article dans une revue avec comité de lecture
    MOREAU, Baptiste; GAD, Hisham; ccSANDOZ, Baptiste; ccSKALLI, Wafa; ccLAPORTE, Sébastien; ccVERGARI, Claudio (SAGE Publications, 2016)
    INTRODUCTION: There is a lack of numeric data for the mechanical characterization of spine muscles, especially in vivo data. The multifidus muscle is a major muscle for the stabilization of the spine and may be involved ...
  • Quantitative geometric analysis of rib, costal cartilage and sternum from childhood to teenagehood 
    Article dans une revue avec comité de lecture
    ccSANDOZ, Baptiste; BADINA, Alina; LAMBOT, Karene; MITTON, David; ccSKALLI, Wafa; ccLAPORTE, Sébastien (Springer Verlag, 2013)
    Better understanding of the effects of growth on children’s bones and cartilage is necessary for clinical and biomechanical purposes. The aim of this study is to define the 3D geometry of children’s rib cages: including ...
  • Sled acceleration control for low speed impact testing and transient response studies 
    Article dans une revue avec comité de lecture
    ccSANDOZ, Baptiste; SIMONIN, Antoine; SALETTI, Dominique; ccLAPORTE, Sébastien (Taylor & Francis, 2014)
    Whiplash Associated Disorder is the most common soft-tissue injury arising from low-speed car crashes (Siskind et al. 2013). To better understand whiplash injury mechanisms in the head-neck system, a sled was ...
  • Transient Response of the Head Kinematics - Influence of a Disturbed Visual Flow 
    Communication sans acte
    ccSANDOZ, Baptiste; PROVOST, Clément; LE COZ, Jean-Yves; ccLAPORTE, Sébastien (2014)
    Vision influences the controlled kinematics of human body. Previous studies have shown the influence of vision on head stabilization or whole posture. However, latencies between the stimuli and the head motion have never ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales