Surveillance
Laboratory Investigations
Biomechanical Modeling
Clinical Studies
2013
Dufour JS, Marras WS, Knapik GG (2013) " An EMG-assisted model calibration technique that does not require MVCs. " Journal of Electromyography and Kinesiology, (in press).
2012
Knapik GG, Mendel E and Marras WS. (2012) " Use of a personalized hybrid biomechanical model to assess change in lumbar spine function with a TDR compared to an intact spine. " European Spine Journal, 21 (Suppl 5), S641-S652.
Marras WS (2012) " The Complex Spine: The Multi-Dimensional System of Causal Pathways for Low Back Disorders. " Human Factors 54(6) 881-889.
Dul J, Bruder R, Buckle P, Caryon P, Falzon P, Marras WS, Wilson JR, and van der Boelen B (2012) " A Strategy for Human Factors/Ergonomics: Developing the discipline and profession. " Ergonomics, 55(4), 377-395.
Vandlen KA, Marras WS, and Mendelsohn DA (2012) " A Nonlinear Contact Algorithm Predicting Facet Joint Contribution in the Lumbar Spine of a Specific Person. " Theoretical Issues in Ergonomics Science, 13(3), 303-317.
2011
Yang G, Marras WS and Best TM. (2011) " The biochemical response to biomechanical tissue loading on the low back during physical work exposure. " Clinical Biomechanics, 26(5), 431-7.
2009
Marras, W.S., Cutlip, R.G., Burt, S.E., and T.R. Waters (2009) “National Occupational Research Agenda (NORA) Future Directions in Occupational Musculoskeletal Disorder Health Research. ” Applied Ergonomics. 40, 15-22.
2007
Gallagher, S., Marras, W.S., Litsky, A.S., Burr, D., Landoll, J, and Matkovic, V., (2007) “A Comparison of Fatigue Failure Responses of Old Versus Middle-Aged Lumbar Motion Segments in Simulated Flexed Lifting,” Spine, 32(8).
Hou, Y., Aurada, JM, Karwowski, W, Marras, W.S., and Davis, K. (2007) “Estimation of the Dynamic Spinal Forces Using A Recurrent Fuzzy Neural Network” IEEE Transactions on Systems, Man, and Cybrenetics – Part B: Cybrenetics, 37(1), 100-109.
Theado, E.W., Knapik, G.G., and Marras, W.S. (2007) “Modification of an EMG-assisted biomechanical model for pushing and pulling,” International Journal of Industrial Ergonomics,37(11-12), 825-831.
2006
Karwowski, W., Gaweda, A., Marras, W.S., Davis, K., Zurada, J.M. and Rodrick, D. (2006) “A Fuzzy Relational Rule Network Modeling of Electromyographical Activity of Trunk Muscles in Manual Lifting Based on Trunk Angles, Moments, Pelvic Tilt and Rotation Angels.” International Journal of Industrial Ergonomics, 36, 847-859.
Gallagher, S., Marras, W.S., Litsky, A.S., Burr, D. (2006) "An Exploratory Study of Loading and Morphometric Factors Associated With Specific Failure Modes in Fatigue Testing of Lumbar Motion Segments." Clinical Biomechanics,21, 228-234.
2005
Campbell-Kyureghyan, N., Marras, W.S., Burr, D., and Jorgensen, M.J. (2005) "The Prediction of Lumbar Spine Geometry: Method Development and Validation." Clinical Biomechanics, 20(455-464).
Gallagher, S., Marras, W.S., Litsky, A.S., and Burr, D. (2005) "Torso flexion loads and the fatigue failure of human lumbrosacral motion segments." Spine, 30(20) 2265-2273.
2004
Jorgensen, M.J., Marras, W.S., Smith, F.W., and M.H. Pope (2004) “Sagittal Plane Moment Arms of the Female Lumbar Region Rectus Abdominis in an Upright Neutral Torso Posture," Clinical Biomechanics, 20(3) 242-246.
2003
Jorgensen, M.J., Marras, W.S., Gupta, P., and Waters, T.R. (2003) “Sagittal Plane Moment-Arms of the Male and Female Lumbar Erector Spinae as a Function of Torso Flexion”. The Spine Journal, 3(5), 363-369.
Jorgensen, M.J., Marras, W.S., Gupta, P., and Waters, T.R. (2003) “Cross-sectional area of the lumbar back muscles as a function of torso flexion”. Clinical Biomechanics, 18(4), 280-286.
Lee, W., Karwowski, W., Marras, W.S., and Rodrick, D. (2003) “A Neuro-Fuzzy Modeling of Myoelectrical Activity of Trunk Muscles Due to Manual Lifting Tasks”, Ergonomics, 46(1-3), 285-309.
2001
Marras, W.S., Jorgensen, M.J., Granata, K.P., and Wiand, B. (2001) "Female and Male Trunk Geometry: Size and Prediction of the Spine Loading Trunk Muscles Derived from MRI," Clinical Biomechanics, 16(1), 38-46.
Parnianpour, M., Ghosh, K., Barin, K., and Marras, W.S. (2001) “Quantification of Trunk Motion in Response to Complex Platform Perturbations while Holding Weights in an Upright Posture”, Biomedical Engineering, Applications, Basis and Communications, 13(1): 33-46.
Marras, W.S., Davis, K.G., and A.B. Maronitis (2001) "A Non-MVC EMG Normalization Technique for the Trunk Musculature: Part 2. Validation and Use to Predict Spinal Loads," Journal of Electromyography and Kinesiology, 11(1), 11-18.
Marras, W.S. and Davis, K.G. (2001) "A Non-MVC EMG Normalization Technique for the Trunk Musculature: Part 1. Method Development," Journal of Electromyography and Kinesiology, 11(1), 1-9.
Jorgensen, M.J., Marras, W.S., Granata, K.P., and Wiand, B. (2001) "MRI-Derived Moment-Arms of the Female and Male Spine Loading Muscles," Clinical Biomechanics, 16(3), 182-193.
2000
Marras, W.S., Jorgensen, M.J., Granta, K.P., and Wiand, B. (2000) "Female and Male Trunk Geometry, Size and Prediction of the Spine Loading Muscles Derived from MRI," Clinical Biomechanics, 16(1), 38-46.
Nelson, J.E., Treaster, D.E., and Marras, W.S. (2000) "Finger Motion, Wrist Motion, and Tendon Travel as A Function of Keyboard Angles," Clinical Biomechanics, 15(7), 489-498.
Marras, W.S., Allread, W.G., Burr, D.L., and Fathallah, F.A. (2000) "Validation of a Low Back Disorder Risk Model: A Prospective Study of Ergonomic Interventions Associated with Manual Materials Handling Jobs," Ergonomics, 43(11), 1866-1886.
1999
Fahallah, F.A., Marras, W.S., and Parianpour, M. (1999) "Regression Models for Predicting Peak and Continuous Three-Dimensional Spinal Loads During Symmetric and Asymmetric Lifting Tasks," Human Factors, 41(3), 373-388
Marras, W.S., Granata, K.P. and Davis, K.G. (1999) "Variability in Spine Loading Model Performance," Clinical Biomechanics, 14(8), 505-514.
1998
Marras, W.S., Davis, K.G., and Granata, K.P. (1998) "Trunk Muscle Activities During Asymmetric Twisting Motions," Journal of Electromyography and Kinesiology, 8(4), 247-256.
Sparto, P.J., Parnianpour, M., Marras, W.S., Granata, K.P., Reinsel, T.E., Simon, S.R. (1998) "The Effect Of EMG-Force Relationships And Method Of Gain Estimation On The Predictions Of An EMG-Driven Model Of Spinal Loading," Spine, 23(4), 423-429.
Fathallah, F.A., Marras, W.S., and Parnianpour, M. (1998) "An Assessment of Complex Spinal Loads During Dynamic Lifting Tasks," Spine, 23(6), 706-716.
1997
Marras, W. S. Granata, K. P. (1997) "Spine loading during trunk lateral bending motions" Journal of Biomechanics, 30(7), 697-703.
Marras, W.S., and Granata, K.P. (1997) "The Development Of An EMG-Assisted Model To Assess Spine Loading During Whole-body Free-Dynamic Lifting," Journal of Electromyography and Kinesiology, 7(4), 259-268.
Fathallah, F.A., Marras, W.S., Parnianpour, M., and Granata, K.P. (1997) "A Method For Measuring External Spinal Loads During Unconstrained Free-Dynamic Lifting," Journal of Biomechanics, 30(9), 975-978.
Sparto, P.J., Parnianpour, M., Marras, W.S., Granata, K.P., Reinsel, T.E., and Simon, S.R. (1997) "Neuromuscular Trunk Performance And Spinal Loading During A Fatiguing Isometric Trunk Extension With Varying Torque Requirements," Journal of Spinal Disorders, 10(2), 145-156.
1996
Kim, J.Y., Parnianpour, M., and Marras, W.S. (1996) "Quantitative Assessment Of The Control Capability Of The Trunk Muscles During Oscillatory Bending Motion Under A New Experimental Protocol," Clinical Biomechanics, 11(7), 385-391.
1995
Granata, K.P., and Marras, W.S. (1995) "An EMG-Assisted Model of Trunk Loading During Free-Dynamic Lifting," Journal of Biomechanics, 28(11), 1309-1317.
Marras, W.S., and Granata, K.P. (1995) "A Biomechanical Assessment and Model of Axial Twisting in the Thoraco-Lumbar Spine," Spine, 20(13), 1440-1451.
Fathallah, F.A., Marras, W.S., and Wright, L.P. (1995) " Trunk Muscle and Intra-Abdominal Pressure Behavior During Trunk Axial Twisting Motions," Journal of Bioengineering, (in review).
1994
Marras, W.S., Parnianpour, M. Kim, J.Y., Ferguson, S.A., Crowell, R.R, and Simon, S.R. (1994) "A Normal Database of Dynamic Trunk Motion Characteristics During Repetitive Trunk Flexion and Extension as A Function of Task Asymmetry, Age and Gender," IEEE Transactions, 2(3), 137-146.
Schoenmarklin, R.W., Marras, W.S., and Leurgans S.E. (1994) "Industrial Wrist Motions and Risk of Cumulative Trauma Disorders in Industry," Ergonomics, 37(9), 1449-1459.
Gallagher, S., Hamrick, C.A., Love, A.C., and Marras, W.S. (1994) "Dynamic Biomechanical Modeling of Symmetric and Asymmetric Lifting Tasks in Restricted Postures," Ergonomics, 37(8), 1289-1310.
1993
Lavender, S.A., Marras, W.S., and Miller, R.A. (1993) "The Development of Preparatory Response Strategies in Anticipation of Sudden Loading to the Torso," Spine, 18(14), 2097-2105.
Marras, W.S., and Mirka, G.A. (1993) "Electromyographic Studies of the Lumbar Trunk Musculature During the Generation of Low Level Trunk Acceleration," Journal of Orthopaedic Research, 11(6), 811-817.
Mirka G.A., and Marras, W.S. (1993) "A Stochastic Model of Trunk Muscle Activities During Trunk Bending," Spine, Volvo Award for Low Back Pain Research, 18(11), 1396-1409.
Granata, G.P., and Marras, W.S. (1993) "An EMG-Assisted Model of Loads on the Lumbar Spine During Asymmetric Trunk Extensions,"Journal of Biomechanics, 26(12), 1429-1438.
1992
Ferguson, S.A., and Marras, W.S. (1992) "Quantification of Velocity Coupling During Asymmetric Lifting," International Journal of Industrial Ergonomics, 10, 207-215.
1991
Marras, W.S. (1991) "A Model for the Objective Assessment of Automobile Restraint Systems," International Journal of Industrial Ergonomics, 8(1), 59-65.
Marras, W.S., and Sommerich, C.M. (1991) "A Three Dimensional Motion Model of Loads on the Lumbar Spine, Part I: Model Structure," Human Factors, 33(2), 123-137.
Marras, W.S., and Sommerich, C.M. (1991) "A Three Dimensional Motion Model of Loads on the Lumbar Spine, Part II: Model Validation," Human Factors, 33(2), 139-149.
1990
Mirka, G.A., and Marras, W.S. (1990)"Lumbar Motion Response to a Constant Load Velocity Lift," Human Factors, 32(4), 493-501.
Marras, W.S., and Mirka, G.A. (1990) "Trunk Responses to Asymmetric Acceleration," Journal of Orthopaedic Research, 8(6), 824-832.
Kroemer, K.H.E., Marras, W.S., McGlothlin, J.D., McIntyre, D.R., and M. Nordin (1990) "On the Measurement of Human Strength," International Journal of Industrial Ergonomics, 6, 199-210.
1989
Reilly, C.H., and Marras, W.S. (1989) "SIMULIFT: A Simulation Model of Human Trunk Motion During Lifting," Spine, 14(1), 5-11.
1988
Marras, W.S., and Reilly, C.H. (1988) "Networks of Internal Trunk Loading Activities Under Controlled Trunk Motion Conditions," Spine, 13(6), 661-667.
Marras, W.S. (1988) "Predictions of Forces Acting Upon the Lumbar Spine Under Isometric and Isokinetic Conditions: A Model-Experiment Comparison," International Journal of Industrial Ergonomics, 3(1), 19-27.
1985
Marras, W.S., Joynt, R.L., and King, A.I. (1985) "The Force Velocity Relation and Intra-Abdominal Pressure During Lifting Activities," Ergonomics, 23(3), 603-613.
1980
Kroemer, K.H.E. and W.S. Marras (1980) "Towards an Objective Assessment of the Maximal Voluntary Contractin Component in Routine Muscle Strength Measurements," European Journal of Applied Physiology, 45, 1-9.
