Comparison of 3D dynamic virtual model to link segment model for estimation of net L4/L5 reaction moments during lifting

The purpose of this study was to validate a 3D dynamic virtual model for lifting tasks against a validated link segment model (LSM). A face validation study was conducted by collecting x, y, z coordinate data and using them in both virtual and LSM models. An upper body virtual model was needed to calculate the 3D torques about human joints for use in simulated lifting styles and to estimate the effect of external mechanical devices on human body. Firstly, the model had to be validated to be sure it provided accurate estimates of 3D moments in comparison to a previously validated LSM. Three synchronised Fastrak™ units with nine sensors were used to record data from one male subject who completed dynamic box lifting under 27 different load conditions (box weights (3), lifting techniques (3) and rotations (3)). The external moments about three axes of L4/L5 were compared for both models. A pressure switch on the box was used to denote the start and end of the lift. An excellent agreement was found between the two models for dynamic lifting tasks, especially for larger moments in flexion and extension. This virtual model was considered valid for use in a complete simulation of the upper body skeletal system. This biomechanical virtual model of the musculoskeletal system can be used by researchers and practitioners to give a better tool to study the causes of LBP and the effect of intervention strategies, by permitting the researcher to see and control a virtual subject's motions.

[1]  Ricardo Pietrobon,et al.  Estimates and Patterns of Direct Health Care Expenditures Among Individuals With Back Pain in the United States , 2004, Spine.

[2]  M. Adams,et al.  Bending and compressive stresses acting on the lumbar spine during lifting activities. , 1994, Journal of biomechanics.

[3]  Joan M. Stevenson,et al.  Estimation of load transfer force to the hands during sagittal plane box lifting , 2004 .

[4]  T. Andriacchi,et al.  Relationship between moments at the L5/S1 level, hip and knee joint when lifting. , 1990, Journal of biomechanics.

[5]  G B Andersson,et al.  Influence of body segment dynamics on loads at the lumbar spine during lifting. , 1992, Ergonomics.

[6]  Carlo J. De Luca,et al.  The Use of Surface Electromyography in Biomechanics , 1997 .

[7]  A. Hof,et al.  An explicit expression for the moment in multibody systems. , 1992, Journal of biomechanics.

[8]  A. Plamondon,et al.  Validation of two 3-D segment models to calculate the net reaction forces and moments at the L(5)/S(1) joint in lifting. , 1996, Clinical biomechanics.

[9]  S H Snook,et al.  The design of manual handling tasks: revised tables of maximum acceptable weights and forces. , 1991, Ergonomics.

[10]  F. V. D. van der Helm,et al.  Calibration of the "Flock of Birds" electromagnetic tracking device and its application in shoulder motion studies. , 1999, Journal of biomechanics.

[11]  A J Tate,et al.  Evaluation and calibration of an electromagnetic tracking device for biomechanical analysis of lifting tasks. , 2002, Journal of biomechanics.

[12]  G A Dumas,et al.  Calibration of position and angular data from a magnetic tracking device. , 2000, Journal of biomechanics.

[13]  Mary M Rodgers,et al.  Scapular kinematics during transfers in manual wheelchair users with and without shoulder impingement. , 2005, Clinical biomechanics.

[14]  J Cholewicki,et al.  Methodological considerations for using inductive sensors (3SPACE ISOTRAK) to monitor 3-D orthopaedic joint motion. , 1997, Clinical biomechanics.

[15]  M J Pearcy,et al.  New method for the non-invasive three-dimensional measurement of human back movement. , 1989, Clinical biomechanics.

[16]  G A Dumas,et al.  Evaluation of a long-range transmitter for use with a magnetic tracking device in motion analysis. , 1998, Journal of biomechanics.

[17]  François Poulin,et al.  Interference during the use of an electromagnetic tracking system under OR conditions. , 2002, Journal of biomechanics.

[18]  W. Cats-Baril,et al.  An overview of the incidences and costs of low back pain. , 1991, The Orthopedic clinics of North America.

[19]  Narinder Nayar.  Deneb/ERGO: a simulation based human factors tool , 1995, WSC '95.

[20]  K N An,et al.  Application of a magnetic tracking device to kinesiologic studies. , 1988, Journal of biomechanics.

[21]  Suzanne LaScalza,et al.  Effect of metal and sampling rate on accuracy of Flock of Birds electromagnetic tracking system. , 2003, Journal of biomechanics.

[22]  Adrian Lindsay Morphett,et al.  The use of electromagnetic tracking technology for measurement of passive cervical range of motion: a pilot study. , 2003, Journal of manipulative and physiological therapeutics.

[23]  A Garg,et al.  A method for evaluating the biomechanical stresses resulting from manual materials handling jobs. , 1977, American Industrial Hygiene Association journal.

[24]  Richard P. Paul,et al.  Robot manipulators : mathematics, programming, and control : the computer control of robot manipulators , 1981 .

[25]  Vladimir M. Zatsiorsky,et al.  Kinetics of Human Motion , 2002 .

[26]  H M Toussaint,et al.  Segment inertial parameter evaluation in two anthropometric models by application of a dynamic linked segment model. , 1996, Journal of biomechanics.

[27]  B. Elliott,et al.  Three-dimensional measurement of lumbar spine kinematics for fast bowlers in cricket. , 1998, Clinical biomechanics.

[28]  Pyter N. Hoekstra.  Some Uses of “Active Viewing” in Computer Aided Anthropometric Assessment , 1993 .

[29]  W. Cats-Baril,et al.  Identifying patients at risk of becoming disabled because of low-back pain. The Vermont Rehabilitation Engineering Center predictive model. , 1991, Spine.

[30]  Bonnie Webber,et al.  Simulation and analysis of complex human tasks for manufacturing , 1995, Optics East.

[31]  G R Johnson,et al.  Measurement of three-dimensional shoulder movement by an electromagnetic sensor. , 1990, Clinical biomechanics.

[32]  Maurice Bonney,et al.  Computer aided ergonomics and workspace design , 1995 .

[33]  J. Westerink,et al.  TADAPS: A three dimensional CAD man model , 1990 .

[34]  Christian Larivière,et al.  Comparison between two dynamic methods to estimate triaxial net reaction moments at the L5/S1 joint during lifting. , 1998, Clinical biomechanics.

[35]  J H van Dieën,et al.  Lumbar loading during lifting: a comparative study of three measurement techniques. , 2001, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[36]  Frymoyer Jw,et al.  An overview of the incidences and costs of low back pain. , 1991 .

[37]  Jaap H van Dieën,et al.  Precision of estimates of mean and peak spinal loads in lifting. , 2002, Journal of biomechanics.

[38]  M. de Looze,et al.  Validation of a dynamic linked segment model to calculate joint moments in lifting. , 1992, Clinical biomechanics.

[39]  J H van Dieën,et al.  Asymmetric low back loading in asymmetric lifting movements is not prevented by pelvic twist. , 1998, Journal of biomechanics.

[40]  K. Singer,et al.  Assessment of combined movements of the lumbar spine in asymptomatic and low back pain subjects using a three-dimensional electromagnetic tracking system. , 1999, Manual therapy.

[41]  Waldemar Karwowski,et al.  Computer applications in ergonomics, occupational safety and health : proceedings of the International Conference on Computer-Aided Ergonomics and Safety '92 - CAES '92, Tampere, Finland, 18-20 May, 1992 , 1992 .