Li Qun Zhang

Summary

Affiliation: Northwestern University
Country: USA

Publications

  1. pmc Simultaneous characterizations of reflex and nonreflex dynamic and static changes in spastic hemiparesis
    Li Qun Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, USA
    J Neurophysiol 110:418-30. 2013
  2. ncbi request reprint Multiaxis muscle strength in ACL deficient and reconstructed knees: compensatory mechanism
    Li Qun Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, USA
    Med Sci Sports Exerc 34:2-8. 2002
  3. pmc Ultrasonic evaluations of Achilles tendon mechanical properties poststroke
    Heng Zhao
    Rehabilitation Institute of Chicago, Suite 1406, 345 East Superior St, Chicago, IL 60611
    J Appl Physiol (1985) 106:843-9. 2009
  4. ncbi request reprint In vivo load sharing among the quadriceps components
    Li Qun Zhang
    Department of Orthopaedic Surgery, Northwestern University, 645 N Michigan Avenue, Suite 910, Chicago, IL 60611 4496, USA
    J Orthop Res 21:565-71. 2003
  5. ncbi request reprint Six degrees-of-freedom kinematics of ACL deficient knees during locomotion-compensatory mechanism
    Li Qun Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL 60611, USA
    Gait Posture 17:34-42. 2003
  6. ncbi request reprint Intelligent stretching of ankle joints with contracture/spasticity
    Li Qun Zhang
    Rehabilitation Institute of Chicago, The Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL 60611 USA
    IEEE Trans Neural Syst Rehabil Eng 10:149-57. 2002
  7. ncbi request reprint Reflex and intrinsic changes induced by fatigue of human elbow extensor muscles
    L Q Zhang
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Northwestern University, Chicago, IL 60611, USA
    J Neurophysiol 86:1086-94. 2001
  8. ncbi request reprint Dynamic and static control of the human knee joint in abduction-adduction
    L Q Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University Sensory Motor Performance Program, Rehabilitation Institute of Chicago, 345 E Superior Street, Chicago, IL 60611, USA
    J Biomech 34:1107-15. 2001
  9. ncbi request reprint Muscle strength in knee varus and valgus
    L Q Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, Evanston, IL 60611, USA
    Med Sci Sports Exerc 33:1194-9. 2001
  10. ncbi request reprint Biomechanic changes in passive properties of hemiplegic ankles with spastic hypertonia
    Sun G Chung
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Arch Phys Med Rehabil 85:1638-46. 2004

Collaborators

Detail Information

Publications73

  1. pmc Simultaneous characterizations of reflex and nonreflex dynamic and static changes in spastic hemiparesis
    Li Qun Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, USA
    J Neurophysiol 110:418-30. 2013
    ..047). Simultaneous characterizations of reflex and nonreflex changes in spastic hemiparesis may help to evaluate and treat them more effectively. ..
  2. ncbi request reprint Multiaxis muscle strength in ACL deficient and reconstructed knees: compensatory mechanism
    Li Qun Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, USA
    Med Sci Sports Exerc 34:2-8. 2002
    ..The purposes of this study were to evaluate multiaxis muscle strength in ACL deficient and reconstructed knees and to gain insights into potential compensatory mechanisms adopted by the patients...
  3. pmc Ultrasonic evaluations of Achilles tendon mechanical properties poststroke
    Heng Zhao
    Rehabilitation Institute of Chicago, Suite 1406, 345 East Superior St, Chicago, IL 60611
    J Appl Physiol (1985) 106:843-9. 2009
    ..In vivo quantitative characterizations of the tendon biomechanical properties may help us better understand changes of the calf muscle-tendon unit as a whole and facilitate development of more effective treatments...
  4. ncbi request reprint In vivo load sharing among the quadriceps components
    Li Qun Zhang
    Department of Orthopaedic Surgery, Northwestern University, 645 N Michigan Avenue, Suite 910, Chicago, IL 60611 4496, USA
    J Orthop Res 21:565-71. 2003
    ..002). Our in vivo approach determined subject- and condition-specific load sharing among individual muscles and showed that the central nervous system utilized the centrally located, uniarticular VI in submaximal isometric knee extension...
  5. ncbi request reprint Six degrees-of-freedom kinematics of ACL deficient knees during locomotion-compensatory mechanism
    Li Qun Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL 60611, USA
    Gait Posture 17:34-42. 2003
    ....
  6. ncbi request reprint Intelligent stretching of ankle joints with contracture/spasticity
    Li Qun Zhang
    Rehabilitation Institute of Chicago, The Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL 60611 USA
    IEEE Trans Neural Syst Rehabil Eng 10:149-57. 2002
    ....
  7. ncbi request reprint Reflex and intrinsic changes induced by fatigue of human elbow extensor muscles
    L Q Zhang
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Northwestern University, Chicago, IL 60611, USA
    J Neurophysiol 86:1086-94. 2001
    ..In short, the reduced contribution from intrinsic stiffness to joint torque was compensated by increased contribution from dynamic stretch reflexes after fatigue...
  8. ncbi request reprint Dynamic and static control of the human knee joint in abduction-adduction
    L Q Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University Sensory Motor Performance Program, Rehabilitation Institute of Chicago, 345 E Superior Street, Chicago, IL 60611, USA
    J Biomech 34:1107-15. 2001
    ....
  9. ncbi request reprint Muscle strength in knee varus and valgus
    L Q Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, Evanston, IL 60611, USA
    Med Sci Sports Exerc 33:1194-9. 2001
    ..The hypothesis was that humans could differentially contract the medial and lateral muscles crossing the knee and generate significant moments in knee valgus-varus...
  10. ncbi request reprint Biomechanic changes in passive properties of hemiplegic ankles with spastic hypertonia
    Sun G Chung
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Arch Phys Med Rehabil 85:1638-46. 2004
    ..To investigate quantitatively biomechanic changes in the passive properties of hemiplegic spastic ankles...
  11. ncbi request reprint In vivo and noninvasive load sharing among the vasti in patellar malalignment
    Mohsen Makhsous
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Illinois 60611, USA
    Med Sci Sports Exerc 36:1768-75. 2004
    ..We hypothesized that the vastus medialis oblique (VMO) and vastus medialis longus (VML) of PFP patients contribute less to knee extension than that in controls...
  12. doi request reprint Separate quantification of reflex and nonreflex components of spastic hypertonia in chronic hemiparesis
    Sun G Chung
    Rehabilitation Institute of Chicago, Chicago, IL, USA
    Arch Phys Med Rehabil 89:700-10. 2008
    ....
  13. pmc In vivo patellar tracking induced by individual quadriceps components in individuals with patellofemoral pain
    Fang Lin
    Rehabilitation Institute of Chicago, Sensory Motor Performance Program, 345 East Superior Street, Room 1408, Chicago, IL 60611, USA
    J Biomech 43:235-41. 2010
    ..Quantitative evaluation of the influence of individual quadriceps components on patellar tracking will aid understanding of the knee extensor mechanism and provide insight into the etiology of patellofemoral pain...
  14. doi request reprint Effects of robot-guided passive stretching and active movement training of ankle and mobility impairments in stroke
    Genna Waldman
    Feinberg School of Medicine, Northwestern University, IL 60611, USA
    NeuroRehabilitation 32:625-34. 2013
    ..To investigate the effects of controlled passive stretching and active movement training using a portable rehabilitation robot on stroke survivors with ankle and mobility impairment...
  15. ncbi request reprint Multi-axis passive and active stiffnesses of the glenohumeral joint
    Mohsen Makhsous
    Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, USA
    Clin Biomech (Bristol, Avon) 19:107-15. 2004
    ..To investigate passive and active glenohumeral stiffness in the anterior, posterior, superior, and inferior directions at different lateral positions of the humerus...
  16. ncbi request reprint Feedback-controlled and programmed stretching of the ankle plantarflexors and dorsiflexors in stroke: effects of a 4-week intervention program
    Ruud W Selles
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Arch Phys Med Rehabil 86:2330-6. 2005
    ..To investigate the effect of repeated feedback-controlled and programmed "intelligent" stretching of the ankle plantar- and dorsiflexors to treat subjects with ankle spasticity and/or contracture in stroke...
  17. pmc Changes of calf muscle-tendon biomechanical properties induced by passive-stretching and active-movement training in children with cerebral palsy
    Heng Zhao
    Rehabilitation Institute of Chicago, Chicago, Illinois, USA
    J Appl Physiol (1985) 111:435-42. 2011
    ..018). In vivo characterizations of calf muscles and Achilles tendon mechanical properties help us better understand treatment-induced changes of calf muscle-tendon and facilitate development of more effective treatments...
  18. ncbi request reprint Two-part surgical neck fractures of the proximal part of the humerus. A biomechanical evaluation of two fixation techniques
    Sara L Edwards
    Department of Orthopaedic Surgery, Northwestern University, 645 North Michigan Avenue, Suite 910, Chicago, IL 60611, USA
    J Bone Joint Surg Am 88:2258-64. 2006
    ..The purpose of this study was to compare the biomechanical stability of a proximal humeral intramedullary nail and a locking plate for the treatment of a comminuted two-part fracture of the surgical neck in a human cadaver model...
  19. doi request reprint Position-dependent, hyperexcitable patellar reflex dynamics in chronic stroke
    Chung Yong Yang
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Arch Phys Med Rehabil 94:391-400. 2013
    ..To quantify tendon tap response (TTR) properties and their position dependence using multiple neuromechanical parameters, and to analyze correlations among neuromechanical and clinical measures...
  20. doi request reprint Improvement in off-axis neuromuscular control through pivoting elliptical training: Implication for knee injury prevention
    Song Joo Lee
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 2010:4846-9. 2010
    ..The results showed that the pivoting elliptical training is effective to improve off-axis neuromuscular control in healthy individuals and such training protocol can potentially be implemented to prevent knee injury...
  21. doi request reprint Changes in passive mechanical properties of the gastrocnemius muscle at the muscle fascicle and joint levels in stroke survivors
    Fan Gao
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Arch Phys Med Rehabil 90:819-26. 2009
    ..To investigate the ankle joint-level and muscle fascicle-level changes and their correlations in stroke survivors with spasticity, contracture, and/or muscle weakness at the ankle...
  22. pmc Altered contractile properties of the gastrocnemius muscle poststroke
    Fan Gao
    Rehabilitation Institute of Chicago, Suite 1406, 345 East Superior St Chicago, IL 60611, USA
    J Appl Physiol (1985) 105:1802-8. 2008
    ....
  23. doi request reprint Developing a multi-joint upper limb exoskeleton robot for diagnosis, therapy, and outcome evaluation in neurorehabilitation
    Yupeng Ren
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    IEEE Trans Neural Syst Rehabil Eng 21:490-9. 2013
    ..Feasibility of the integrated capabilities was demonstrated through experiments with stroke survivors and healthy subjects...
  24. ncbi request reprint ACL impingement prediction based on MRI scans of individual knees
    David T Fung
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Clin Orthop Relat Res 460:210-8. 2007
    ....
  25. ncbi request reprint In vivo and noninvasive three-dimensional patellar tracking induced by individual heads of quadriceps
    Fang Lin
    Department of Physical Medicine and Rehabilitation, Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Med Sci Sports Exerc 36:93-101. 2004
    ..The purpose of this study was to investigate in vivo and noninvasively patellar tracking induced by individual quadriceps components...
  26. doi request reprint Biomechanical comparison of 3 methods to repair pectoralis major ruptures
    Stephen J Rabuck
    Northwestern University, Department of Orthopaedic Surgery, Chicago, Illinois, USA
    Am J Sports Med 40:1635-40. 2012
    ..Multiple options exist for tendon repairs, but the strongest construct has yet to be identified...
  27. doi request reprint Offaxis neuromuscular training of knee injuries using an offaxis robotic elliptical trainer
    Song Joo Lee
    Rehabilitation Institute of Chicago, Chicago, IL60611, USA
    Conf Proc IEEE Eng Med Biol Soc 2011:2081-4. 2011
    ....
  28. ncbi request reprint Evaluations of neuromuscular dynamics of hyperactive reflexes poststroke
    Jie Liu
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    J Rehabil Res Dev 48:577-86. 2011
    ..05), indicating hyperactive neurological state and muscle contraction dynamics poststroke. This study presents a convenient and quantitative method to evaluate reflex excitability and muscle contraction dynamics...
  29. pmc Quantitative evaluations of ankle spasticity and stiffness in neurological disorders using manual spasticity evaluator
    Qiyu Peng
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    J Rehabil Res Dev 48:473-81. 2011
    ....
  30. ncbi request reprint Comparison of lateral locking plate and antiglide plate for fixation of distal fibular fractures in osteoporotic bone: a biomechanical study
    Keith P Minihane
    Department of Orthopaedic Surgery, Northwestern University School of Medicine, 645 North Michigan Ave, Suite 910, Chicago, IL 60611, USA
    J Orthop Trauma 20:562-6. 2006
    ..The purpose of this study was to compare the biomechanical properties of posterolateral antiglide plating and lateral locked plating for fixation of displaced short oblique fractures of the fibula in osteoporotic bone...
  31. ncbi request reprint Aging-related neuromuscular changes characterized by tendon reflex system properties
    Sun G Chung
    Rehabilitation Institute of Chicago, IL 60611, USA
    Arch Phys Med Rehabil 86:318-27. 2005
    ..To quantitatively evaluate changes in neuromuscular reflex system properties that are associated with aging...
  32. doi request reprint Changes of calf muscle-tendon properties due to stretching and active movement of children with cerebral palsy--a pilot study
    Heng Zhao
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Northwestern University, Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 2009:5287-90. 2009
    ..5%), increased cross-sectional area (5.5%), increased stiffness (22.9%), increased Young's modulus (13.8%), decreased soleus muscle fascicular stiffness (53.7%), and decreased medial gastrocnemius fascicular stiffness (46.1%)...
  33. doi request reprint Characterization of spasticity in cerebral palsy: dependence of catch angle on velocity
    Yi Ning Wu
    Rehabilitation Institute of Chicago, IL 60611, USA
    Dev Med Child Neurol 52:563-9. 2010
    ..To evaluate spasticity under controlled velocities and torques in children with cerebral palsy (CP) using a manual spasticity evaluator...
  34. pmc A knee-specific finite element analysis of the human anterior cruciate ligament impingement against the femoral intercondylar notch
    Hyung Soon Park
    Rehabilitation Institute of Chicago, 345 East Superior Street, Room 1406, Chicago, IL 60611, USA
    J Biomech 43:2039-42. 2010
    ..The modeling and experimental approach provides a useful tool to characterize potential ACL impingement on a knee-specific basis, which may help elucidate the ACL injury mechanism and develop more effective treatments...
  35. doi request reprint Deltoid ligament reconstruction: a novel technique with biomechanical analysis
    Steven L Haddad
    Illinois Bone and Joint Institute, LLC, Department of Orthopaedic Surgery, Glenview Medical Arts Building, 2401 Ravine Way, 2nd Floor, Glenview, IL 60025, USA
    Foot Ankle Int 31:639-51. 2010
    ..Reconstructive efforts thus far have been less than satisfactory. We describe a novel technique that reconstructs both main limbs of the deltoid ligament in anatomic orientation while providing secure graft fixation...
  36. pmc In vivo noninvasive evaluation of abnormal patellar tracking during squatting in patients with patellofemoral pain
    Nicole A Wilson
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, 345 East Superior Street, Chicago, IL 60611, USA
    J Bone Joint Surg Am 91:558-66. 2009
    ..We tested the hypothesis that patients with patellofemoral pain exhibit characteristic patterns of patellar tracking that are different from those of healthy subjects...
  37. ncbi request reprint Sitting with adjustable ischial and back supports: biomechanical changes
    Mohsen Makhsous
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, Illinois 60611, USA
    Spine (Phila Pa 1976) 28:1113-21; discussion 1121-2. 2003
    ....
  38. ncbi request reprint Modeling of ACL impingement against the intercondylar notch
    David T Fung
    Rehabilitation Institute of Chicago, Suite 1406, 345 E Superior Street, Chicago, IL 60611, USA
    Clin Biomech (Bristol, Avon) 18:933-41. 2003
    ..To develop a 3-D mathematical model that accurately evaluates anterior cruciate ligament impingement against the intercondylar notch...
  39. ncbi request reprint Measurement of elbow spasticity in stroke patients using a manual spasticity evaluator
    Yi Ning Wu
    Dept of Phys Med and Rehabilitation, Northwestern Univ, Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 1:3974-7. 2006
    ..EMG signals corroborated MSE assessment of the catch angle...
  40. doi request reprint Gender differences in passive knee biomechanical properties in tibial rotation
    Hyung Soon Park
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, 345 East Superior Street, Room 1406, Chicago, Illinois 60611, USA
    J Orthop Res 26:937-44. 2008
    ..The results suggest that women may be at greater risk of ACL injury resulting from impingement against the lateral wall of the intercondylar notch, which has been shown to be associated with external tibial rotation and abduction...
  41. ncbi request reprint In vivo biomechanical evaluations of the medial gastrocnemius: changes in muscle properties in stroke survivors
    Fan Gao
    Rehabilitation Inst of Chicago, Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 1:2083-6. 2006
    ....
  42. doi request reprint The anterior deltoid's importance in reverse shoulder arthroplasty: a cadaveric biomechanical study
    Daniel G Schwartz
    Department of Orthopaedic Surgery, Northwestern University, Chicago, IL, USA
    J Shoulder Elbow Surg 22:357-64. 2013
    ..The purpose of this study was to determine the 3-dimensional (3D) moment arms for all 6 deltoid segments, and determine the biomechanical significance of the anterior deltoid before and after reverse shoulder arthroplasty...
  43. doi request reprint Develop a wearable ankle robot for in-bed acute stroke rehabilitation
    Yupeng Ren
    Rehabtek and Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 2011:7483-6. 2011
    ..Passively, the wearable robot stretches the joint to its extreme positions safely and forcefully. Actively, movement training is conducted and game playing is used to guide and motivate the patient in movement training...
  44. doi request reprint Combined passive stretching and active movement rehabilitation of lower-limb impairments in children with cerebral palsy using a portable robot
    Yi Ning Wu
    Rehabilitation Institute of Chicago, Chicago, IL, USA
    Neurorehabil Neural Repair 25:378-85. 2011
    ..Improving motor control is also a focus of physical therapy. However, convenient and effective ways to control passive stretching and motivate active movement training with quantitative outcomes are lacking...
  45. ncbi request reprint Effect of bracing on dynamic patellofemoral contact mechanics
    Nicole A Wilson
    Rehabilitation Institute of Chicago, Chicago, IL, USA
    J Rehabil Res Dev 47:531-41. 2010
    ..Sleeve braces may be useful for treatment of patellar subluxation disorders, while wrap-style braces may be effective for treatment of disorders associated with degenerative cartilage changes...
  46. doi request reprint Training for knee injury prevention using a pivoting elliptical machine
    Yupeng Ren
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 2008:727-30. 2008
    ..The pivoting elliptical training improved the off-axis neuromuscular control considerably. Training-induced neuromuscular changes in tibial rotation were assessed with multiple outcome measures...
  47. doi request reprint Suture-button versus screw fixation of the syndesmosis: a biomechanical analysis
    Robert Klitzman
    Northwestern Department of Orthopaedic Surgery, 676 N Saint Clair, Suite 1350, Chicago, IL 60611, USA
    Foot Ankle Int 31:69-75. 2010
    ..The purpose of this study was to compare both the biomechanical and physiologic properties of suture-button fixation to the intact syndesmosis and screw fixation...
  48. doi request reprint Efficacy of robotic rehabilitation of ankle impairments in children with cerebral palsy
    Yi Ning Wu
    Rehabilitation Institute of Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 2010:4481-4. 2010
    ....
  49. ncbi request reprint Biomechanical and histological evaluation of osteochondral transplantation in a rabbit model
    Ellis K Nam
    Department of Orthopaedic Surgery, Northwestern Medical School, Chicago, Illinois, USA
    Am J Sports Med 32:308-16. 2004
    ..Biomechanical and histological properties of osteochondral transplantation have not been extensively examined...
  50. doi request reprint Extra-articular distal tibia fractures: a mechanical evaluation of 4 different treatment methods
    Michael Hoenig
    Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
    J Orthop Trauma 24:30-5. 2010
    ..A3) with an intact fibula...
  51. doi request reprint In vivo sarcomere imaging and fiber tension measurements
    Yi Ning Wu
    Rehabilitation Institute of Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 2010:1986-9. 2010
    ..The in vivo evaluation provides us a powerful tool to investigate pathological changes of fibers/sarcomeres and help determine proper treatment...
  52. ncbi request reprint Elastic laminae in vascular development and disease
    Shu Q Liu
    Biomedical Engineering Department, Northwestern University, Evanston, IL 60208, USA
    Mol Cell Biomech 7:59-76. 2010
    ....
  53. ncbi request reprint Muscular torque generation during imposed joint rotation: torque-angle relationships when subjects' only goal is to make a constant effort
    P R Burgess
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Northwestern University Medical School, 345 East Superior Street, Room 1406, Chicago, IL 60611, USA
    Somatosens Mot Res 19:327-40. 2002
    ....
  54. pmc Trefoil factor 3 as an endocrine neuroprotective factor from the liver in experimental cerebral ischemia/reperfusion injury
    Shu Q Liu
    Biomedical Engineering Department, Northwestern University, Evanston, Illinois, United States of America
    PLoS ONE 8:e77732. 2013
    ..These observations suggest an endocrine neuroprotective mechanism involving TFF3 from the liver in experimental cerebral ischemia/reperfusion injury. ..
  55. doi request reprint A portable telerehabilitation system for remote evaluations of impaired elbows in neurological disorders
    Hyung Soon Park
    Rehabilitation Institute of Chicago, Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL 60611, USA
    IEEE Trans Neural Syst Rehabil Eng 16:245-54. 2008
    ..Overall, the teleassessment system allowed the clinician to remotely evaluate the impaired elbow of stroke survivors, including assessment of the passive ROM, active ROM, muscle strength, velocity-dependent spasticity, and catch angle...
  56. doi request reprint Cardioprotective proteins upregulated in the liver in response to experimental myocardial ischemia
    Shu Q Liu
    Biomedical Engineering Department, Northwestern University, Evanston, Illinois 60208 3107, USA
    Am J Physiol Heart Circ Physiol 303:H1446-58. 2012
    ..These observations suggest that the liver contributes to cardioprotection in MI by upregulating and releasing protective secretory proteins. These proteins may be used for the development of cardioprotective agents...
  57. pmc In vivo strain of the medial vs. lateral quadriceps tendon in patellofemoral pain syndrome
    Nicole A Wilson
    Rehabilitation Institute of Chicago, Sensory Motor Performance Program, 345 East Superior St, Rm 1406, Chicago, IL 60611, USA
    J Appl Physiol (1985) 107:422-8. 2009
    ..This technique can potentially be used in a clinical setting to evaluate quadriceps tendon properties and infer the presence of muscle weakness in PFP...
  58. pmc Load sharing properties of cervical pedicle screw-rod constructs versus lateral mass screw-rod constructs
    Bradley J Dunlap
    Department of Orthopaedic Surgery, NorthShore University Healthcare System, 1000 Central Street, Suite 880, Evanston, IL 60201, USA
    Eur Spine J 19:803-8. 2010
    ..Though there are dangers associated with the insertion of cervical pedicle screws, their use might be advantageous in some clinical conditions when increased load sharing is necessary...
  59. ncbi request reprint Vertically oriented femoral neck fractures: mechanical analysis of four fixation techniques
    Arash Aminian
    Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 6007, USA
    J Orthop Trauma 21:544-8. 2007
    ..The purpose of this study was to compare the biomechanical stability of four differing fixation techniques for stabilizing vertical shear femoral neck fractures...
  60. ncbi request reprint Arthroscopic distal clavicle resection: a biomechanical analysis of resection length and joint compliance in a cadaveric model
    Sara L Edwards
    Department of Orthopaedic Surgery, Northwestern University, Chicago, Illinois, USA
    Arthroscopy 23:1278-84. 2007
    ..The hypothesis of this study was that AC contact can be avoided by excising less than 5 mm of bone from the distal clavicle...
  61. pmc Near-term fetal hypoxia-ischemia in rabbits: MRI can predict muscle tone abnormalities and deep brain injury
    Alexander Drobyshevsky
    Department of Pediatrics, NorthShore University Health Systems, Evanston, IL 60202, USA
    Stroke 43:2757-63. 2012
    ....
  62. doi request reprint Biomechanical analysis of bursal-sided partial thickness rotator cuff tears
    Scott Yang
    Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
    J Shoulder Elbow Surg 18:379-85. 2009
    ..This study aims to evaluate the relationship between depth of partial thickness tears and strain...
  63. ncbi request reprint In vivo three-dimensional mechanical actions of individual
    Jason E Hsu
    Department of Orthopaedic Surgery, Northwestern University, Chicago, IL, USA
    J Appl Biomech 24:325-32. 2008
    ..Rehabilitation and strengthening of the flexor-pronator muscle group may help prevent failure of the ulnar collateral ligament and may also help compensate for a medially insufficient elbow...
  64. doi request reprint A comparison of biomechanical stability and pullout strength of two C1-C2 fixation constructs
    Jason W Savage
    Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
    Spine J 11:654-8. 2011
    ..Recent literature suggests that intralaminar screw (LS) fixation and pedicle screw (PS) fixation offer similar stability and comparable pullout strength. No studies have compared these characteristics after cyclic loading...
  65. doi request reprint Formation of smooth muscle alpha actin filaments in CD34+ bone marrow cells on arterial elastic laminae: potential role of SH2 domain-containing protein tyrosine phosphatase-1
    Shu Q Liu
    Biomedical Engineering Department, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 3107, United States
    Matrix Biol 27:282-94. 2008
    ..These observations suggest that elastic laminae stimulate the formation of SM alpha actin filaments in CD34+ bone marrow cells and SHP-1 mediates the stimulatory effect of elastic laminae...
  66. ncbi request reprint Simultaneous and nonlinear identification of mechanical and reflex properties of human elbow joint muscles
    L Q Zhang
    Sensory Motor Performance Program, Rehabilitation Institute of Chicago, IL 60611, USA
    IEEE Trans Biomed Eng 44:1192-209. 1997
    ..In particular, reflexively-mediated stiffness generated a significant portion of the total joint stiffness and the percentage varied systematically with background muscle torque...
  67. doi request reprint Robust identification of multi-joint human arm impedance based on dynamics decomposition: a modeling study
    Sang Hoon Kang
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    Conf Proc IEEE Eng Med Biol Soc 2011:4453-6. 2011
    ..The approach can be similarly applied to identify more sophisticated systems with more joints/DOFs involved...
  68. doi request reprint Automatic tracking of muscle fascicles in ultrasound images using localized Radon transform
    Heng Zhao
    Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
    IEEE Trans Biomed Eng 58:2094-101. 2011
    ..Both the simulation and experimental results show that the proposed method is robust in the presence of speckle noise, accurate in terms of orientation and position measurement, and feasible for analyzing clinical data...
  69. ncbi request reprint In vivo and noninvasive six degrees of freedom patellar tracking during voluntary knee movement
    Fang Lin
    Department of Physical Medicine and Rehabilitation, Northwestern University, 345 E Superior Street, Chicago, IL 60611, USA
    Clin Biomech (Bristol, Avon) 18:401-9. 2003
    ..The purpose of this study was to investigate in vivo and noninvasively patellar tracking in six degrees of freedom during voluntary knee extension and flexion...
  70. ncbi request reprint Moment distribution among human elbow extensor muscles during isometric and submaximal extension
    L Q Zhang
    Department of Physical Medicine and Rehabilitation, Northwestern University, USA
    J Biomech 33:145-54. 2000
    ..Cross-validation using fresh data (not used in determining the moment distribution) showed close match between the measured and predicted elbow extension moment except for trials in which fatigue became significant...
  71. doi request reprint Flexor pollicis longus dysfunction after volar plate fixation of distal radius fractures
    Brian J Chilelli
    Department of Orthopaedic Surgery and Biostatistics Collaboration Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
    J Hand Surg Am 38:1691-7. 2013
    ..To evaluate the natural history and etiology of decreased thumb interphalangeal (IP) joint flexion after volar plate fixation of distal radius fractures...
  72. ncbi request reprint Stiffness, viscosity, and upper-limb inertia about the glenohumeral abduction axis
    L Q Zhang
    Department of Orthopaedic Surgery, Northwestern University, Rehabilitation Institute of Chicago, Illinois 60611, USA
    J Orthop Res 18:94-100. 2000
    ....
  73. doi request reprint Mid-diaphyseal fibular fractures with syndesmotic disruption: should we plate the fibula?
    Jason Y Ho
    Dept of Orthopedic Surgery, Kaiser Permanente Walnut Creek Medical Center, 1425 S Main St, Walnut Creek, CA 94596, USA
    Foot Ankle Int 29:587-92. 2008
    ..The treatment of mid-diaphyseal fibula fractures with syndesmotic disruption is controversial. The purpose of this study was to compare the biomechanical properties of 2 fixation constructs...

Research Grants13

  1. ACL injury mechanisms & offaxis neuromuscular diagnosis & training
    Li Qun Zhang; Fiscal Year: 2010
    ....
  2. Neuromechanical changes caused by stroke & stretching
    Li Qun Zhang; Fiscal Year: 2006
    ..The long-term goals are to provide effective, convenient, and low-cost treatments of spastic limbs in neurologically impaired patients with quantitative outcome evaluation in multiple aspects. ..
  3. Developing an intelligent & portable stretching device
    Li Qun Zhang; Fiscal Year: 2006
    ..The overall objectives of the Phase II project are to develop an effective, portable, low-cost, and user-friendly intelligent stretcher, suitable and economical for patients to use in clinic or home and ready for commercialization. ..
  4. NEUROMECHANICS OF KNEE EXTENSOR/MALALIGNMENT
    Li Qun Zhang; Fiscal Year: 2002
    ..Changes in the above properties induced by patellar malalignment and correction induced by patellar taping will be quantified using the above designs. ..