Biomechanical modeling of the control of trunk muscles

M. Beauséjour, C. É Aubin, A. B. Mitnitski, A. G. Feldman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper presents 2 models postulating specific control mechanisms for trunk movement production. The first model represents the trunk as an inverted pendulum with two degrees of freedom (trunk inclination and flexion/extension in sagittal plane) controlled by 6 mono- and bi-articular muscles. Dynamic equations for trunk extension included gravitational, passive elastic and muscle forces. The equilibrium point hypothesis (λ model) was used to simulate the control processes underlying the movement based on 3 control parameters (reciprocal and co-activation commands, and a damping factor). This model was able to simulate the empirical relationship between trunk inclination and flexion/extension as well as EMG patterns during load lifting. The second model is characterized by a more geometrically elaborated representation of the spine, rib cage and pelvis and uses a finite elements approach. It includes 160 muscle fascicles represented by non-linear springs with threshold lengths modified according to the λ model to produce the muscle recruitment patterns for specific motor tasks. This model, personalized to the shape of two subjects (one scoliotic and one healthy), was used to simulate a lateral bending test. Preliminary results showed the coherent behavior of the multiple muscle structure.

Original languageEnglish
Title of host publicationResearch into Spinal Deformities 2
PublisherIOS Press
Pages150-153
Number of pages4
ISBN (Print)9051994303, 9789051994308
DOIs
Publication statusPublished - 1999
Externally publishedYes
Event2nd Biannual Meeting of the International Research Society of Spinal Deformities, IRSSD 1998 - Burlington, VT, United States
Duration: Jun 1 1998Jun 1 1998

Publication series

NameStudies in Health Technology and Informatics
Volume59
ISSN (Print)0926-9630
ISSN (Electronic)1879-8365

Conference

Conference2nd Biannual Meeting of the International Research Society of Spinal Deformities, IRSSD 1998
Country/TerritoryUnited States
CityBurlington, VT
Period6/1/986/1/98

ASJC Scopus Subject Areas

  • Biomedical Engineering
  • Health Informatics
  • Health Information Management

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Beauséjour, M., Aubin, C. É., Mitnitski, A. B., & Feldman, A. G. (1999). Biomechanical modeling of the control of trunk muscles. In Research into Spinal Deformities 2 (pp. 150-153). (Studies in Health Technology and Informatics; Vol. 59). IOS Press. https://doi.org/10.3233/978-1-60750-903-5-150