Human Musculoskeletal Biomechanics Lab

Publications

Journal Publications

  • Shojaei I, Nussbaum M, Bazrgari B. Age related differences in trunk muscle reflexive behaviors. Journal of Biomechanics 2016 (in press)
  • Vazirian M, VanDillen L, Bazrgari B. Lumbopelvic rhythm during trunk motion in the sagittal plane: A review of the kinematic measurement methods and characterization approaches. Physical Therapy and Rehabilitation 2016;3,5
  • Shojaei I, Allen-Bryant K., Bazrgari B. Viscoelastic response of the human lower back to passive flexion; the effects of age. Annals of Biomedical Engineering 2016; 44:2817-26
  • Shojaei I, Hendershot BD, Wolf EJ, Bazrgari B. Persons with unilateral transfemoral amputation experience larger spinal loads during level-ground walking compared to able-bodied individuals. Clinical Biomechanics 2016; 32:157-63 
  • Shojaei I, Vazirian M, Croft E, Nussbaum MA, Bazrgari B. Age-related changes in mechanical demands imposed on the lower back by manual material handling tasks. Journal of Biomechanics 2016; 49:896-903 
  • Vazirian M, Shojaei I, Tromp R, Nussbaum MA, Bazrgari B. Age-related differences in intrinsic trunk stiffness. Journal of Biomechanics 2016; 49:962-932 
  • Phillips M, Catherine P. Starnes, Shapiro R, Bazrgari B. The effects of military body armor on isometric and isokinetic knee behaviors. IIE Transactions on Occupational Ergonomics and Human Factors 2015; 3: 210-220 
  • Phillips M, Shapiro R, Bazrgari B. The effects of military body armor on the lower back and knee mechanics during box drop and prone to stand tasks. Ergonomics 2016; 59:682-91
  • Shojaei I, Arjmand N, Bazrgari B. An optimization-based method for prediction of lumbar spine segmental kinematics from the measurements of thorax and pelvic kinematics. International journal for numerical methods in biomedical engineering. 2015; e02729
  • Shahvarpour A, Shirazi-Adl A, Lariviere C, Bazrgari, B. Computation of trunk stability in forward perturbations–effects of preload, perturbation load, initial flexion and abdominal preactivation. Journal of Biomechanics 2015; 48: 716-720
  • Phillips M, Bazrgari B, Shapiro R. The effects of military body armor on the lower back and knee mechanics during toe-touch and two-legged squat tasks. Ergonomics 2015; 58:492-503
  • Shahvarpour A, Shirazi-Adl A, Lariviere C, Bazrgari, B. Trunk active response and spinal forces in sudden forward loading – Analysis of the role of perturbation load and pre-perturbation conditions by a kinematics-driven model. Journal of Biomechanics 2015; 48: 44-52 
  • Hendershot BD, Bazrgari B, Nussbaum MA. Persons with unilateral lower-limb amputation have altered and asymmetric trunk mechanical and neuromuscular behaviors estimated using multidirectional trunk perturbations. Journal of Biomechanics 2013; 46: 1907-12 
  • Toosizadeh N, Bazrgari B, Hendershot B, Muslim K,  Nussbaum MA, Madigan ML. Disturbance and recovery of trunk mechanical and neuromuscular behaviors following repetitive lifting: Influences of flexion angle and lift rate on creep-induced effects. Ergonomics 2013; 56: 954-63 
  • Muslim K, Bazrgari B, Hendershot B, Toosizadeh N, Nussbaum MA, Madigan ML. Disturbance and recovery of trunk mechanical and neuromuscular behaviors following repeated static trunk flexion: Influences of duration and duty cycle on creep-induced effects. Applied Ergonomics. 2013; 44:643-51
  • Miller E, Bazrgari B, Nussbaum MA, Madigan ML. Effects of Exercise-Induced Low Back Pain on Intrinsic Trunk Stiffness and Paraspinal Muscle Reflexes. Journal of Biomechanics 2013; 46:801-5
  • Toosizadeh N, Nussbaum MA, Bazrgari B, Madigan ML. Load-relaxation properties of the human trunk in response to prolonged flexion: measuring and modeling the effect of flexion angle. Plos One 2012; 7 e48625. (FULL TEXT)
  • Hendershot B, Bazrgari B, Nussbaum MA. Madigan ML. Within-and between-day reliability of trunk mechanical behaviors estimated using position-controlled perturbations. Journal of Biomechanics.2012; 45:2019-22
  • Miller E, Bazrgari B, Nussbaum MA, Madigan ML. Effects of gender, preload, and trunk angle on intrinsic stiffness. Journal of Musculoskeletal Research 2012; 15: No 2
  • Bazrgari B, Nussbaum MA, Madigan ML. Estimation of trunk mechanical properties using system identification: effects of experimental setup and modeling assumptions. Computer Methods in Biomechanics and Biomedical Eng. 2012;15:1001-9
  • Bazrgari B, Hendershot B, Muslim K, Toosizadeh N, Nussbaum MA, Madigan ML. Recovery of trunk behaviors following prolong trunk flexion: influences of flexion duration and external loads. Ergonomics 2011; 54: 1043-52.
  • Bazrgari B, Nussbaum MA, Madigan ML, Shirazi-Adl A. Soft tissue wobbling affects trunk biodynamic responses to sudden anterior perturbations. J. of Biomechanics 2011;44:547:51.
  • Hendershot B, Bazrgari B, Muslim K, Toosizadeh N, Nussbaum MA, Madigan ML. Disturbance and recovery of intrinsic stiffness and reflexive muscle responses following trunk flexion: influences of flexion angle and duration. Clinical Biomechanics 2011;26: 250-6.
  • Wang W, Bazrgari B, Shirazi-Adl A, Rakheja S, Boileau PE. Biodynamic response and spinal load estimation of seated body in vibration using finite element modeling. Industrial Health 2010; 48: 557-64. (FULL TEXT)
  • Bazrgari B, Shirazi-Adl A, Lariviere C. Trunk response analysis under sudden forward perturbations using a kinematics-driven model.  J. of Biomechanics 2009; 42: 1193-1200. (FULL TEXT)
  • Bazrgari B, Shirazi-Adl A, Parnianpour M. Transient analysis of trunk response in sudden release loading using kinematics-driven finite element model. Clinical Biomechanics, 2009; 24: 341-7.
  • Bazrgari B, Shirazi-Adl A, Kasra M. Seated whole body vibration with high magnitude acceleration; relative role of inertia and muscle force. J. of Biomechanics, 2008; 41: 2639-46.
  • Bazrgari B, Shirazi-Adl A, Kasra M. Trunk muscle forces, spinal loads, and spinal stability under whole body vibration: A model study. J. of Sound and Vibration 2008; 318: 1334-47.
  • Bazrgari B, Shirazi Adl A., Trottier M, Mathieu P. Computation of trunk equilibrium and stability in free flexion-extension movements at different velocities. J. of Biomechanics, 2008; 41:  412-21.
  • Arjmand N, Shirazi-Adl A., Bazrgari B., Parnianpour M. Application of Kinematics Driven Approach in Human Spine Biomechanics. Scientia Iranica 2008; 15: 596-612. (FULL TEXT)
  • Bazrgari B, Shirazi Adl A. Spinal stability and role of passive stiffness in dynamic squat and stoop lifting. Computer Methods in Biomechanics and Biomedical Eng., 2007; 10: 351-60.
  • Bazrgari B, Shirazi-Adl A, Arjmand N. Biomechanical analysis of squat and stoop dynamic liftings – muscle forces and internal spinal loads.European Spine Journal, 2007; 16: 687-99. (FULL TEXT)
  • Arjmand N, Shirazi-Adl A., Bazrgari B. Wrapping of trunk thoracic extensor muscles influences muscle forces and spinal loads in lifting tasks.Clinical Biomechanics 2006; 21: 668-675.

Book Chapters:

Other Publications:

  • Shojaei I, Bazrgari B. An optimization-based method for prediction of lumbar spine segmental kinematics from the measurements of thorax and pelvic kinematics. Science in the Age of Experience. May 23-25 2016 Boston, MA USA.
  • Shojaei I, Bazrgari B. Age-related differences in visco-elastic behavior of the lower back during passive flexion tests. 40th annual meeting of the American Society of Biomechanics, August 2-5 2016 Raleigh, NC, USA 
  • Vazirian M, Tromp R, Phillips MP, Bazrgari B.The effect of wearing body armor on trunk intrinsic stiffness. 40th annual meeting of the American Society of Biomechanics, August 2-5 2016 Raleigh, NC, USA 
  • Shojaei I, Suri C, Bazrgari B. Age-related differences in activity of trunk extensors during trunk flexion-extension motion. 40th annual meeting of the American Society of Biomechanics, August 2-5 2016 Raleigh, NC, USA 
  • Vazirian M, Bazrgari B. Age-related differences in the relative timing of lumbar and pelvic contributions to the trunk motion in the sagittal plane. 40th annual meeting of the American Society of Biomechanics, August 2-5 2016 Raleigh, NC, USA 
  • Croft EC, Sanders, G Nitz A, Bazrgari B. Spinal manipulation does not improve balancing performance of healthy individuals on an unstable seat. Combined Sections Meeting of the American Physical Therapy Association, February 17-20, 2016 Anaheim, CA, USA 
  • Shojaei I, Vazirian M, Croft E, Nussbaum MA, Bazrgari B. Lower back biomechanics during manual material handling task; the effects of aging. Biomedical Engineering Society’s Annual Meeting, October 7-10, 2015 Tampa, FL, USA. 
  • Vazirian M, Shojaei I, Tromp R, Nussbaum MA, Bazrgari B. Age-related alterations in trunk intrinsic stiffness. Biomedical Engineering Society’s Annual Meeting, October 7-10, 2015 Tampa, FL, USA. 
  • Phillips MP, Starnes CP, Shapiro R, Bazrgari B. The effects of military body armor on knee strength. Biomedical Engineering Society’s Annual Meeting, October 7-10, 2015 Tampa, FL, USA. 
  • Shojaei I, Vazirian M, Croft E, Bazrgari B. Age-related differences in responses of lower back tissues and the resultant spinal loads during lifting. 39th annual meeting of the American Society of Biomechanics, August 5-8 2015 Columbus, OH, USA 
  • Schmitz A, Abbasi Z, Kamineni S, Bazrgari B. Changes in tibiofemoral contact forces following alterations in joint capsule stiffness. 39thannual meeting of the American Society of Biomechanics, August 5-8 2015 Columbus, OH, USA 
  • Vazirian M, Shojaei I, Agarwal A, Bazrgari B. The lumbopelvic ratio during trunk flexion: the effects of age, gender and motion pace. 39thannual meeting of the American Society of Biomechanics, August 5-8 2015 Columbus, OH, USA 
  • Phillips MP, Shapiro R, Bazrgari B. The effects of military body armor on knee mechanics during box drop and prone to standing tasks. 39thannual meeting of the American Society of Biomechanics, August 5-8 2015 Columbus, OH, USA 
  • Shahvarpour A, Shirazi-Adl A, Larivière C, Bazrgari B. Effects of preload, perturbation load, initial flexion and abdominal preactivation on spinal stability in sudden perturbation. 21st Congress of the European Society of Biomechanics, July 5-8, 2015 Prague, Czech Republic. 
  • Vazirian M, Shojaei I, Tromp R, Nussbaum MA, Bazrgari B. Age and gender differences in trunk intrinsic stiffness. International workshop on Spine Loading and Deformation; From Loading to Recovery, July 2-4, 2015 Berlin, Germany. 
  • Shojaei I, Vazirian M, Croft E, Nussbaum MA, Bazrgari B. Age-related changes in mechanical demands imposed on the lower back by manual material handling tasks. International workshop on Spine Loading and Deformation; From Loading to Recovery, July 2-4, 2015 Berlin, Germany.
  • Shojaei I, Bazrgari B. Analytical solution for obtaining the lumbar spine segmental rotations. Biomedical Engineering Society’s Annual Meeting, October 22-25, 2014 San Antonio, TX, USA.
  • Vazirian M, Agarwal A, Koch B, Tromp R, Bazrgari B. Sensitivity of lumbopelvic rhythm to risk factors of low back pain. Biomedical Engineering Society’s Annual Meeting, October 22-25, 2014 San Antonio, TX, USA.
  • Shahvarpour A, Shirazi-Adl A, Bazrgari B, Larivière’ C. Experimental and Computational Investigation of Trunk Response to Sudden Forward Perturbations. 7th World Congress of Biomechanics, July 6-11, 2014 Boston, MA, USA.
  • Phillips M, Bazrgari B, Shapiro R. Body armor-induced changes in sagittal plane trunk motion. 7th World Congress of Biomechanics, July 6-11, 2014 Boston, MA, USA.
  • Hendershot B, Wolf E, Bazrgari B.Changes in gait following transfemoral amputation increase spinal loads. 7th World Congress of Biomechanics, July 6-11, 2014 Boston, MA, USA.
  • Koch* BD, Agarwal A, Vazirian M, Bazrgari B. The effects of diurnal changes in behaviors of trunk tissues on trunk mechanical properties. 37hannual meeting of the American Society of Biomechanics, Sep 4-7, 2013, Omaha, NE, USA.
  • Bazrgari B, Nussbaum MA, Madigan ML, Shirazi-ADl A. Trunk dynamic responses to sudden perturbations: Effects of soft tissue wobbling. 4th American Conference on Human Vibration, June 13-15, 2012, Hartford, CT, USA.
  • Muslim K, Bazrgari B, Hendershot B, Toosizadeh N, Nussbaum MA, Madigan ML. Disturbances to intrinsic stiffness and reflexive muscle responses following repeated static trunk flexion. 36th annual meeting of the American Society of Biomechanics, Aug 15-18, 2012, Gainesville, FL, USA.
  • Miller E, Bazrgari B, Nussbaum MA, Madigan ML. Effects of exercise-induced low back pain on intrinsic trunk stiffness. 35th annual meeting of the American Society of Biomechanics, August 10-13, 2011, Long Beach, California, USA.
  • Hendershot B, Bazrgari B, Nussbaum MA, Madigan ML. Comparison of mechanical- and EMG-based estimates of trunk reflexes to sudden perturbations. 10th Annual Graduate Student Research Symposium, May 12, 2011, Blacksburg, Virginia, USA.
  • Bazrgari B, Nussbaum MA, Madigan ML. Effects of experimental setup and modeling assumptions on predicted trunk properties using a system identification method. 34th annual meeting of the American Society of Biomechanics, August 18-21, 2010, Providence, Rhode Island, USA.
  • Miller E, Bazrgari B, Hendershot B, Nussbaum MA, Madigan ML. Dynamic response of the trunk to position perturbations – effects of gender, preload, and trunk angle. 34th annual meeting of the American Society of Biomechanics, August 18-21, 2010, Providence, Rhode Island, USA.
  • Hendershot B, Bazrgari B, Muslim K, Toosizadeh N, Nussbaum MA, Madigan ML. Disturbances to intrinsic and reflexive muscle responses following exposure to prolonged static trunk flexion. 34th annual meeting of the American Society of Biomechanics, August 18-21, 2010, Providence, RI, USA.
  • Toosizadeh N, Bazrgari B, Hendershot B, Muslim K, Nussbaum MA. In vivo load-relaxation of the trunk with prolonged flexion. 34th annual meeting of the American Society of Biomechanics, August 18-21, 2010, Providence, Rhode Island, USA.
  • Bazrgari B, Shirazi-Adl A, Arjmand N. Trunk seated biodynamic response to axial impact; effect of muscle co-activity. 4th International Conference on Whole Body Vibration Injuries, June 2-4, 2009, Montreal, Canada.
  • Wang W, Bazrgari B, Shirazi-Adl A, Rakheja S, Boileau PE. Biodynamic response and spinal load estimation of seated body in vibration using finite element modeling. 4th International Conference on Whole Body Vibration Injuries, June 2-4, 2009, Montreal, Canada.
  • Bazrgari B, Shirazi-Adl A, Parnianpour M. Kinematics-Driven analysis of trunk response under sudden unloading. 55th Annual Meeting of the Orthopaedic Research Society, Feb. 22-25, 2009, Las Vegas, NV, USA.
  • Bazrgari B, Shirazi-Adl A. Spine biodynamic in movements: effect of inertia. CSME Forum 2008, June 5-8,  2008, Ottawa, Canada.
  • Bazrgari B, Shirazi-Adl A, Kasra M. Biodynamics of human trunk in seated whole-body vibration. 2ed American Conference on Human Vibration, June 4-6, 2008, Chicago, Illinois, USA.
  • Bazrgari B, Shirazi-Adl A. Spinal loads and stability under mechanical shock. 2ed American Conference on Human Vibration, June 4-6, 2008, Chicago, Illinois, USA.
  • Bazrgari B, Shirazi Adl A., Trottier M, Mathieu P. Effect of velocity on trunk biodynamic in free flexion-extension movement. 54th Annual Meeting of the Orthopaedic Research Society, March 2-5, 2008, San Francisco, CA, USA.
  • Bazrgari B, Shirazi Adl A. Biomechanics of stoop and squat dynamic lifts using kinematics-driven approach. In proceeding of 21stCanadian Congress of Applied Mechanics, June 3-7, 2007, Toronto, Canada.
  • Bazrgari B, Shirazi-Adl A. Spinal stability and role of passive stiffness in dynamic squat and stoop lifting. 53rd Annual Meeting of the Orthopaedic Research Society, February 11-14, 2007, San Diego, CA USA.
  • Bazrgari B, Shirazi-Adl A, Arjmand N. Load distribution between spinal active-passive systems in squat and stoop dynamic lifts. J Biomechanics, Vol 39, Supp 1, S101-S102 (#4830), 5th World Congress of Biomechanics, July 29 – August 4, 2006, Munich, Germany.
  • Bazrgari B, Shirazi-Adl A, Arjmand N. Biomechanical analyses of squat and stoop lifts using the kinematics-driven finite element model. Poster no. 194, Proceedings of the International society for the study of the Lumbar Spine, 33rd Annual Meeting, June 13-17, 2006, Bergen, Norway.
  • Arjmand N, Shirazi-Adl A, Bazrgari B. Influence of curved lines of action for trunk extensor muscles on load redistribution and stability of the spine during lifting. J Biomechanics, Vol 39, Supp 1, S418 (#4222), 5th World Congress of Biomechanics, July-August 2006, Munich, Germany.