A Proprioception Based Regulation Model to Estimate the Trunk Muscle Forces

Evaluation of loads acting on the spine requires the knowledge of the muscular forces acting on it, but muscles redundancy necessitates developing a muscle forces attribution strategy. Optimisation, EMG, or hybrid models allow evaluating muscle force patterns, yielding a unique muscular arrangement or/and requiring EMG data collection. This paper presents a regulation model of the trunk muscles based on a proprioception hypothesis, which searches to avoid the spinal joint overloading. The model is also compared to other existing models for evaluation. Compared to an optimisation model, the proposed alternative muscle pattern yielded a significant spine postero-anterior shear decrease. Compared to a model based on combination of optimisation criteria, present model better fits muscle activation observed using EMG (38% improvement). Such results suggest that the proposed model, based on regulation of all spinal components, may be more relevant from a physiologic point of view.

[1]  A B Schultz,et al.  Co‐contraction of lumbar muscles during the development of time‐varying triaxial moments , 1995, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[2]  Karl F. Orishimo,et al.  Response of trunk muscle coactivation to changes in spinal stability. , 2001, Journal of biomechanics.

[3]  S. McGill.  A myoelectrically based dynamic three-dimensional model to predict loads on lumbar spine tissues during lateral bending. , 1992, Journal of biomechanics.

[4]  C Larivière,et al.  Comparative ability of EMG, optimization, and hybrid modelling approaches to predict trunk muscle forces and lumbar spine loading during dynamic sagittal plane lifting. , 2001, Clinical biomechanics.

[5]  I A Stokes,et al.  Quantitative anatomy of the lumbar musculature. , 1999, Journal of biomechanics.

[6]  V K Goel,et al.  A combined finite element and optimization investigation of lumbar spine mechanics with and without muscles. , 1993, Spine.

[7]  V. K. Goel,et al.  Loads in the spinal structures during lifting: development of a three-dimensional comprehensive biomechanical model , 1995, European Spine Journal.

[8]  I A Stokes,et al.  Lumbar spine maximum efforts and muscle recruitment patterns predicted by a model with multijoint muscles and joints with stiffness. , 1995, Journal of biomechanics.

[9]  J H van Dieën,et al.  Total trunk muscle force and spinal compression are lower in asymmetric moments as compared to pure extension moments. , 1999, Journal of biomechanics.

[10]  R. Norman,et al.  Comparison of muscle forces and joint load from an optimization and EMG assisted lumbar spine model: towards development of a hybrid approach. , 1995, Journal of biomechanics.

[11]  A L Yettram,et al.  Equilibrium Analysis for the Forces in the Human Spinal Column and Its Musculature , 1980, Spine.

[12]  A. Schultz,et al.  Analysis of Loads on the Lumbar Spine , 1981, Spine.

[13]  J. Cholewicki,et al.  Stabilizing Function of Trunk Flexor‐Extensor Muscles Around a Neutral Spine Posture , 1997, Spine.

[14]  A B Schultz,et al.  Mechanical properties of lumbar spine motion segments under large loads. , 1986, Journal of biomechanics.

[15]  H Labelle,et al.  Comparison Between Preoperative and Postoperative Three‐dimensional Reconstructions of Idiopathic Scoliosis With the Cotrel‐dubousset Procedure , 1995, Spine.

[16]  D B Chaffin,et al.  Lumbar muscle force estimation using a subject-invariant 5-parameter EMG-based model. , 1998, Journal of biomechanics.

[17]  J R Potvin,et al.  Reduction in anterior shear forces on the L 4L 5 disc by the lumbar musculature. , 1991, Clinical biomechanics.

[18]  Lars G. Gilbertson,et al.  A combined finite element and optimization investigation of lumbar spine mechanics with and without muscles. , 1993, Spine.

[19]  R. Hughes,et al.  Evaluation of muscle force prediction models of the lumbar trunk using surface electromyography , 1994, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[20]  M. Dietrich,et al.  Modeling of Muscle Action and Stability of the Human Spine , 1990 .

[21]  R. Norman,et al.  1986 Volvo Award in Biomechanics: Partitioning of the L4 - L5 Dynamic Moment into Disc, Ligamentous, and Muscular Components During Lifting , 1986, Spine.

[22]  I. Stokes,et al.  Lumbar spinal muscle activation synergies predicted by multi-criteria cost function. , 2001, Journal of biomechanics.

[23]  R. Hughes,et al.  Evaluating the effect of co-contraction in optimization models. , 1995, Journal of biomechanics.

[24]  L. Selen,et al.  Trunk muscle activation in low-back pain patients, an analysis of the literature. , 2003, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[25]  M. Solomonow,et al.  Evaluation of isometric antagonist coactivation strategies of electrically stimulated muscles , 1996, IEEE Transactions on Biomedical Engineering.