T R Jenkyn

Summary

Affiliation: University of Western Ontario
Country: Canada

Publications

  1. ncbi request reprint Toe-out gait in patients with knee osteoarthritis partially transforms external knee adduction moment into flexion moment during early stance phase of gait: a tri-planar kinetic mechanism
    Thomas R Jenkyn
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, London, Ont, Canada
    J Biomech 41:276-83. 2008
  2. doi request reprint Image intensifier distortion correction for fluoroscopic RSA: the need for independent accuracy assessment
    Angela E Kedgley
    Department of Bioengineering, Imperial College London, South Kensington Campus, London, SW7 2AZ United Kingdom
    J Appl Clin Med Phys 13:3441. 2012
  3. doi request reprint An analysis of the mechanisms for reducing the knee adduction moment during walking using a variable stiffness shoe in subjects with knee osteoarthritis
    Thomas R Jenkyn
    Department of Mechanical and Materials Engineering, Faculty of Engineering, Spencer Engineering Building, Room 2075, The University of Western Ontario, London, Ontario, Canada N6A 5B9
    J Biomech 44:1271-6. 2011
  4. doi request reprint A comparison of subtalar joint motion during anticipated medial cutting turns and level walking using a multi-segment foot model
    T R Jenkyn
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, London, Ontario, Canada
    Gait Posture 31:153-8. 2010
  5. ncbi request reprint A multi-segment kinematic model of the foot with a novel definition of forefoot motion for use in clinical gait analysis during walking
    T R Jenkyn
    Bioengineering Unit, University of Strathclyde, Glasgow, Scotland, UK
    J Biomech 40:3271-8. 2007
  6. doi request reprint The effect of walking poles on the knee adduction moment in patients with varus gonarthrosis
    D J Bechard
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, University of Western Ontario, Canada
    Osteoarthritis Cartilage 20:1500-6. 2012
  7. doi request reprint Differences in neutral foot positions when measured barefoot compared to in shoes with varying stiffnesses
    R Shultz
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, Canada
    Med Eng Phys 33:1309-13. 2011
  8. doi request reprint Lateral trunk lean explains variation in dynamic knee joint load in patients with medial compartment knee osteoarthritis
    M A Hunt
    Fowler Kennedy Sport Medicine Clinic, University of Western Ontario, London, Ontario, Canada
    Osteoarthritis Cartilage 16:591-9. 2008
  9. doi request reprint Quantifying skin motion artifact error of the hindfoot and forefoot marker clusters with the optical tracking of a multi-segment foot model using single-plane fluoroscopy
    R Shultz
    Division of Sports Medicine, Department of Orthopaedic Surgery, Stanford University School of Medicine, USA Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, Canada
    Gait Posture 34:44-8. 2011
  10. doi request reprint Moments and muscle activity after high tibial osteotomy and anterior cruciate ligament reconstruction
    Crystal O Kean
    Wolf Orthopaedic Biomechanics Laboratory, University of Western Ontario, London, Ontario, Canada
    Med Sci Sports Exerc 41:612-9. 2009

Collaborators

Detail Information

Publications25

  1. ncbi request reprint Toe-out gait in patients with knee osteoarthritis partially transforms external knee adduction moment into flexion moment during early stance phase of gait: a tri-planar kinetic mechanism
    Thomas R Jenkyn
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, London, Ont, Canada
    J Biomech 41:276-83. 2008
    ....
  2. doi request reprint Image intensifier distortion correction for fluoroscopic RSA: the need for independent accuracy assessment
    Angela E Kedgley
    Department of Bioengineering, Imperial College London, South Kensington Campus, London, SW7 2AZ United Kingdom
    J Appl Clin Med Phys 13:3441. 2012
    ..This study suggests that distortion correction should be validated for each of its applications with an independent "gold standard" phantom...
  3. doi request reprint An analysis of the mechanisms for reducing the knee adduction moment during walking using a variable stiffness shoe in subjects with knee osteoarthritis
    Thomas R Jenkyn
    Department of Mechanical and Materials Engineering, Faculty of Engineering, Spencer Engineering Building, Room 2075, The University of Western Ontario, London, Ontario, Canada N6A 5B9
    J Biomech 44:1271-6. 2011
    ..These results suggest that the medial shift in the COP at the foot produced by the intervention shoe stimulates an adaptive dynamic response during gait that reduces the frontal plane lever arm...
  4. doi request reprint A comparison of subtalar joint motion during anticipated medial cutting turns and level walking using a multi-segment foot model
    T R Jenkyn
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, London, Ontario, Canada
    Gait Posture 31:153-8. 2010
    ..This may allow the foot complex to maintain its function of energy absorption followed by energy return during stance phase that is best suited to level walking...
  5. ncbi request reprint A multi-segment kinematic model of the foot with a novel definition of forefoot motion for use in clinical gait analysis during walking
    T R Jenkyn
    Bioengineering Unit, University of Strathclyde, Glasgow, Scotland, UK
    J Biomech 40:3271-8. 2007
    ..Such measurements are crucial if gait analysis is to remain relevant in the orthopaedic and rehabilitative treatment of the foot and ankle...
  6. doi request reprint The effect of walking poles on the knee adduction moment in patients with varus gonarthrosis
    D J Bechard
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, University of Western Ontario, Canada
    Osteoarthritis Cartilage 20:1500-6. 2012
    ..1) Test the hypothesis that walking poles decrease the external knee adduction moment during gait in patients with varus gonarthrosis, and (2) explore potential mechanisms...
  7. doi request reprint Differences in neutral foot positions when measured barefoot compared to in shoes with varying stiffnesses
    R Shultz
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, Canada
    Med Eng Phys 33:1309-13. 2011
    ..This addresses the question of whether separate static trials should be collected for each footwear condition to establish neutral positions...
  8. doi request reprint Lateral trunk lean explains variation in dynamic knee joint load in patients with medial compartment knee osteoarthritis
    M A Hunt
    Fowler Kennedy Sport Medicine Clinic, University of Western Ontario, London, Ontario, Canada
    Osteoarthritis Cartilage 16:591-9. 2008
    ..To test the hypothesis that selected gait kinematics, particularly lateral trunk lean, observed in patients with medial compartment knee osteoarthritis explain variation in dynamic knee joint load...
  9. doi request reprint Quantifying skin motion artifact error of the hindfoot and forefoot marker clusters with the optical tracking of a multi-segment foot model using single-plane fluoroscopy
    R Shultz
    Division of Sports Medicine, Department of Orthopaedic Surgery, Stanford University School of Medicine, USA Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, Canada
    Gait Posture 34:44-8. 2011
    ..The largest errors occurred at toe-off position for all subjects for both the hindfoot and midfoot clusters. Future studies are recommended to quantify true three-dimensional STA of the entire foot during gait...
  10. doi request reprint Moments and muscle activity after high tibial osteotomy and anterior cruciate ligament reconstruction
    Crystal O Kean
    Wolf Orthopaedic Biomechanics Laboratory, University of Western Ontario, London, Ontario, Canada
    Med Sci Sports Exerc 41:612-9. 2009
    ....
  11. ncbi request reprint Test-retest reliability of the peak knee adduction moment during walking in patients with medial compartment knee osteoarthritis
    Trevor B Birmingham
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, University of Western Ontario, London, Ontario, Canada
    Arthritis Rheum 57:1012-7. 2007
    ..To estimate the test-retest reliability of the peak external knee adduction moment during walking in patients with medial compartment knee osteoarthritis (OA), and to describe the interpretation of the reported values...
  12. ncbi request reprint Associations among knee adduction moment, frontal plane ground reaction force, and lever arm during walking in patients with knee osteoarthritis
    Michael A Hunt
    Wolf Orthopaedic Biomechanics Laboratory, 3M Centre, University of Western Ontario, London, Ont, Canada
    J Biomech 39:2213-20. 2006
    ..These results suggest that the frontal plane lever arm assessed during walking is an important variable in the examination of knee OA, and warrants further investigation...
  13. ncbi request reprint Measures of frontal plane lower limb alignment obtained from static radiographs and dynamic gait analysis
    Michael A Hunt
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, University of Western Ontario, London, Ontario, Canada
    Gait Posture 27:635-40. 2008
    ..Future research into the clinical utility of measures of dynamic alignment in the treatment of OA may aid in the development of interventions specifically tailored to one's dynamic lower limb biomechanics during gait...
  14. doi request reprint Internal kinetic changes in the knee due to high tibial osteotomy are well-correlated with change in external adduction moment: an osteoarthritic knee model
    Timothy Bhatnagar
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, Canada
    J Biomech 43:2261-6. 2010
    ..5485). Therefore, the external measure EKAM-impulse is a good proxy of the internal kinetic measure of an MLR-impulse, explaining about 55% of the variance in the change due to a HTO intervention...
  15. doi request reprint Medial opening wedge high tibial osteotomy: a prospective cohort study of gait, radiographic, and patient-reported outcomes
    Trevor B Birmingham
    The Wolf Orthopaedic Biomechanics Laboratory and Fowler Kennedy Sport Medicine Clinic, University of Western Ontario, London, Ontario, Canada
    Arthritis Rheum 61:648-57. 2009
    ....
  16. ncbi request reprint Direct comparison of kinematic data collected using an electromagnetic tracking system versus a digital optical system
    Elizabeth A Hassan
    Department of Mechanical and Materials Engineering, The University of Western Ontario, London, Ont, Canada
    J Biomech 40:930-5. 2007
    ..This level of agreement suggests that the measurements obtained from either system are clinically comparable, provided appropriate smoothing and correction algorithms are employed...
  17. doi request reprint Foot segment kinematics during normal walking using a multisegment model of the foot and ankle complex
    Thomas R Jenkyn
    Wolf Orthopaedic Biomechanics Laboratory, Department of Mechanical and Materials Engineering, Faculty of Engineering, The University of Western Ontario, London ON N6A 5B9, Canada
    J Biomech Eng 131:034504. 2009
    ..Such measurements are crucial if gait analysis is to remain relevant in orthopaedic and rehabilitative treatment of the foot and ankle...
  18. ncbi request reprint Radiographic measures of knee alignment in patients with varus gonarthrosis: effect of weightbearing status and associations with dynamic joint load
    Adrian V Specogna
    Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, Univerwity of Western Ontario, London, Canada
    Am J Sports Med 35:65-70. 2007
    ..Radiographic measures of lower limb malalignment are used to indicate abnormal loading of the knee and to plan corrective procedures...
  19. doi request reprint Comparative accuracy of radiostereometric and optical tracking systems
    Angela E Kedgley
    Wolf Orthopaedic Biomechanics Lab, Fowler Kennedy Sport Medicine Clinic, London, Ontario, Canada
    J Biomech 42:1350-4. 2009
    ..These findings suggest that under ideal conditions, accuracy of fRSA is comparable to traditional RSA, and superior to optical tracking. Accuracy is highest when measured at 45 degrees to the fluoroscopy units...
  20. ncbi request reprint Reliability of lower limb frontal plane alignment measurements using plain radiographs and digitized images
    Adrian V Specogna
    University of Western Ontario, London, Ontario, Canada
    J Knee Surg 17:203-10. 2004
    ..However, the small errors associated with both methods should be considered when making clinical decisions...
  21. ncbi request reprint Noninvasive muscle tension measurement using the novel technique of magnetic resonance elastography (MRE)
    Thomas R Jenkyn
    Motion Analysis Laboratory, Department of Orthopedic Surgery, Mayo Clinic Mayo Foundation, 200 First Street, SW Rochester, MN, 55905, USA
    J Biomech 36:1917-21. 2003
    ..Since it is based on MRI technology, any muscle, however deep, can be interrogated using equipment commonly available in most health care facilities...
  22. ncbi request reprint The effect of infraspinatus disruption on glenohumeral torque and superior migration of the humeral head: a biomechanical study
    Nariyuki Mura
    Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic, Rochester, MN 55905, USA
    J Shoulder Elbow Surg 12:179-84. 2003
    ..Even with a tear extending into the superior infraspinatus, the infraspinatus contributes abduction force generation across the glenohumeral joint...
  23. pmc Foot rotational effects on radiographic measures of lower limb alignment
    Michael A Hunt
    Wolf Orthopaedic Biomechanics Laboratory, The Faculty of Health Sciences, University of Western Ontario, London
    Can J Surg 49:401-6. 2006
    ..One such constraint is natural rotation of the feet with respect to the tibia. The purpose of the present study was to investigate the magnitude of the effect of foot rotation on radiographic measures of lower limb alignment...
  24. ncbi request reprint Finite element model of intramuscular pressure during isometric contraction of skeletal muscle
    Thomas R Jenkyn
    Motion Analysis Laboratory, Department of Orthopedic Surgery, Mayo Clinic Mayo Foundation, Rochester, MN 55905, USA
    Phys Med Biol 47:4043-61. 2002
    ..At muscle lengths longer than optimal, stress and IMP increased predominately due to tension in the passive elastic structures...
  25. ncbi request reprint Evaluation of healthy and diseased muscle with magnetic resonance elastography
    Jeffrey R Basford
    Department of Physical Medicine and Rehabilitation, Mayo Clinic and Foundation, 200 SW Second Street, Rochester, MN 55905, USA
    Arch Phys Med Rehabil 83:1530-6. 2002
    ..To investigate whether a new tissue-imaging technique, magnetic resonance elastography (MRE), offers a viable, noninvasive way to study healthy and diseased muscle...