Research Topics
| Shrawan KumarSummaryAffiliation: University of Alberta Country: Canada Publications
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Detail Information
Publications
Cervical electromyogram profile differences between patients of neck pain and controlShrawan Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Alberta, Canada
Spine (Phila Pa 1976) 32:E246-53. 2007..A comparative analysis of electromyogram (EMG) signals of patients of cervical pain and normal controls...- Kinematic and electromyographic response to whiplash loading in low-velocity whiplash impacts--a reviewShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada T6G 2G4
Clin Biomech (Bristol, Avon) 20:343-56. 2005..This will hopefully improve the understanding of the human response to low-velocity whiplash impacts... - Turning away from whiplash. An EMG study of head rotation in whiplash impactShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 3 75 Corbett Hall, Edmonton, Alta, Canada T6G 2G4
J Orthop Res 23:224-30. 2005..To determine the response of the cervical muscles to whiplash-type perturbations through low-velocity frontal impacts when the head is rotated to the right and left... - Electromyographic and kinematic exploration of whiplash-type rear impacts: effect of left offset impactShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, 3 75 Corbett Hall, University of Alberta, Edmonton, Alberta T6G 2G4, Canada
Spine J 4:656-65; discussion 666-8. 2004..Moreover, the effect of a rear impact offset to the left on the resultant muscle responses is unknown... - Cervical muscle response to whiplash-type right lateral impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
Spine (Phila Pa 1976) 29:E479-87. 2004..Nine healthy volunteers were subjected to right lateral impacts of 4.9, 8.8, 10.8, and 13.7 m/sec acceleration at two levels of expectation: expected and unexpected... - Cervical muscle response to posterolateral impacts--effect of head rotationShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, 3 75 Corbett Hall, University of Alberta, Edmonton, Alta, T6G 2G4, Canada
Clin Biomech (Bristol, Avon) 19:899-905. 2004..The purpose of this study was to determine the response of the cervical muscles to increasing low-velocity rear impacts offset by 45 degrees to the subject's right, but also with the head rotated either right or left... - Electromyographic and kinematic exploration of whiplash-type left anterolateral impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
J Spinal Disord Tech 17:412-22. 2004..Volunteer studies of the cervical muscular response and head-neck kinematics in response to frontal impacts are uncommon. Moreover, the effect of a frontal impact offset to the left on the resultant muscle responses is unknown... - Vibration in operating heavy haul trucks in overburden miningShrawan Kumar
Ergonomics Research Laboratory, Department of Physical Therapy, University of Alberta, Edmonton, T6G 2G4 Canada
Appl Ergon 35:509-20. 2004..Heavy haul trucks (240 and 320 ton capacity) frequently generated vibrations in excess of ISO standards in overburden mining operation representing a health hazard... - Cervical muscle response to right posterolateral impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, 3 75 Corbett Hall, University of Alberta, Edmonton, Alberta, Canada T6G 2G4
Clin Biomech (Bristol, Avon) 19:543-50. 2004..To test the hypothesis that the head kinematic and the cervical muscle EMG responses to unexpected impacts of increasing low-velocity in the posterolateral direction will be greater than to expected impacts... - Cervical muscle response to head rotation in whiplash-type left lateral impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
Spine (Phila Pa 1976) 30:536-41. 2005..Twenty healthy volunteers were subjected to left lateral impacts, randomly looking either left or right... - Looking away from whiplash: effect of head rotation in rear impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
Spine (Phila Pa 1976) 30:760-8. 2005..Twenty healthy volunteers in a laboratory were subjected to rear-end impacts 4.4, 7.9, 10.9, and 13.1 m/s acceleration, with head rotation to the right and left... - Effect of trunk flexion on cervical muscle EMG to rear impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada T6G 2G4
J Orthop Res 23:1105-11. 2005..To determine the effect of occupant positioning on the response of the cervical muscles to whiplash-type posterolateral impacts... - Torque and EMG in rotation extension of the torso from pre-rotated and flexed posturesShrawan Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Alta, Canada T6G 2G4
Clin Biomech (Bristol, Avon) 21:920-31. 2006..Therefore, the objectives of this study are to study torque production capacity of variously rotated and flexed trunk and to measure the EMG of selected trunk muscles in these activities... - An observational electromyography study of the effect of trunk flexion in low-velocity frontal whiplash-type impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada
Arch Phys Med Rehabil 87:496-503. 2006..To examine the effect of forward and lateral trunk flexion on the cervical electromyogram and head kinematic response to whiplash-type frontal impacts... - The effect of seat belt use on the cervical electromyogram response to whiplash-type impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
J Manipulative Physiol Ther 29:115-25. 2006.... - The effect of a 3-point harness restraint and car seat in whiplash-type lateral impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
Spine (Phila Pa 1976) 31:E11-8. 2006..Seventeen healthy volunteers were subjected to right and left lateral impacts 5.0, 6.8, 9.2, and 16.8 m/s acceleration while positioned in a Volvo car seat with lap and shoulder seat belt restraint in laboratory setting... - Cervical muscle response to head rotation in whiplash-type right lateral impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada T6G 2G4
J Manipulative Physiol Ther 28:393-401. 2005..To determine the electromyogram (EMG) response of the cervical muscles to a right lateral impact whiplash-type perturbation when the head is rotated... - The effect of trunk flexion in healthy volunteers in rear whiplash-type impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
Spine (Phila Pa 1976) 30:1742-9. 2005..Twenty young, healthy volunteers in a laboratory were subjected to rear-end impacts 4.4, 7.9, 10.9, and 13.1 m/s acceleration with head rotation to right and left... - Cervical muscle response to trunk flexion in whiplash-type lateral impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 3 75 Corbett Hall, Edmonton, T6G 2G4, AB, Canada
Exp Brain Res 167:345-51. 2005.... - Kinematic and electromyographic response to whiplash-type impacts. Effects of head rotation and trunk flexion: summary of researchShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 3 75 Corbett Hall, Edmonton, Alta, Canada T6G 2G4
Clin Biomech (Bristol, Avon) 20:553-68. 2005..This data adds to attempts to approach an understanding of the human response to more complex scenarios of low-velocity road collisions... - Effect of head rotation in whiplash-type rear impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, 3 75 Corbett Hall, University of Alberta, Edmonton, AB, T6G 2G4, Canada
Spine J 5:130-9. 2005..The effect of head rotation, however, at the time of rear impact is not known... - Cervical muscle response to whiplash-type right anterolateral impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 3 75 Corbett Hall, T6G 2G4 Edmonton AB, Canada
Eur Spine J 13:398-407. 2004..Expecting or being aware of imminent impact plays a role in reducing muscle responses in low-velocity anterolateral impacts... - Isometric axial rotation of the human trunk from pre-rotated posturesShrawan Kumar
Department of Physical Therapy, 3 75 Corbett Hall, University of Alberta, Edmonton, Alberta T6G 2G4, Canada
Eur J Appl Physiol 87:7-16. 2002..001). A significant ( P<0.01) but low correlation between EMG and torque was obtained. Significant linear regressions between torque and EMG of different muscles were obtained ( P<0.01; r=up to 0.70)... - An electromyographic study of low-velocity rear-end impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
Spine (Phila Pa 1976) 27:1044-55. 2002..Experimental analysis was performed to determine the effects of low-velocity rear-end impacts on phasic and magnitudinal activity of the cervical muscles in expected and unexpected conditions... - Theories of musculoskeletal injury causationS Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Canada
Ergonomics 44:17-47. 2001..It is also suggested that while these theories may explain the immediate mechanism of precipitation of injuries, they all operate simultaneously and interact to modulate injuries to varying degrees in different cases... - Electromyography of superficial cervical muscles with exertion in the sagittal, coronal and oblique planesShrawan Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Canada
Eur Spine J 11:27-37. 2002..The cervical muscle strength and cervical muscle EMG are therefore dependent on the direction of effort... - Isometric axial rotation of the trunk in the neutral postureS Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Canada
Eur J Appl Physiol 86:53-61. 2001..01). The timing pattern for these activities was inconsistent, implying that there is no fixed-order phasic recruitment of the torso muscles during maximal isometric axial rotation... - Disability, injury and ergonomics interventionS Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Alberta, T6G 2G4, Canada
Disabil Rehabil 23:805-14. 2001..The purpose of this study is to review disability profile with common disabilities, socioeconomic impact of these disabilities, make a case for ergonomics as an enabler, and provide a couple of case studies to illustrate the point... - Spectral profile of superficial cervical musclesS Kumar
Department of Physical Therapy, 3 75 Corbett Hall, University of Alberta, Edmonton, Alberta T6G 2G4, Canada
J Electromyogr Kinesiol 11:269-80. 2001..In the sternocleidomastoid, and the splenius the MF increased with the grade of contraction, widening its bandwidth at higher grades. The trapezius maintained a narrow bandwidth and its MF declined with the grade of contraction... - Torque and EMG in isometric graded flexion-rotation and extension-rotationS Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Canada
Ergonomics 44:795-813. 2001..25 to 0.54; p<0.01). The regressions were significant (p<0.01) and explained up to 74% of the variance in torque. The flexion-rotation and extension-rotation torques can be predicted with only a moderate accuracy... - Electromyography of trunk muscles in isometric graded axial rotationShrawan Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Canada
J Electromyogr Kinesiol 12:317-28. 2002.... - EMG power spectra of cervical muscles in lateral flexion and comparison with sagittal and oblique plane activitiesShrawan Kumar
Department of Physical Therapy, University of Alberta, 3 75 Corbett Hall, Edmonton, Alberta T6G 2G4, Canada
Eur J Appl Physiol 89:367-76. 2003..001) implying significantly different MF and mean power frequency if the direction of exertion was changed. Male and female subjects responded to direction differently ( P<0.001)... - Metabolic cost and subjective assessment of palletizing and subsequent recoveryS Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Canada
Ergonomics 43:677-90. 2000..05). In the recovery phase only headroom had significantly effect (p<0.001) on metabolic cost. The metabolic recovery took 10 min; however, recovery measured through psychophysical indices appeared to continue for 20 min... - Electromyographic and kinematic exploration of whiplash-type neck perturbations in left lateral collisionsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
Spine (Phila Pa 1976) 29:650-9. 2004..Seven healthy volunteers were subjected to left lateral impacts of 4.8, 7.9, 11, and 13.7 m/s acceleration at two levels of expectation: expected and unexpected... - Role of awareness in head-neck acceleration in low velocity rear-end impactsS Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Canada
Accid Anal Prev 32:233-41. 2000..03), and expectation and axes of acceleration (P < 0.02) would imply that awareness of the impending impact serves to significantly reduce the level of accelerations of head and neck... - Perceived physical stress at work and musculoskeletal discomfort in X-ray technologistsShrawan Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Alberta, Canada
Ergonomics 47:189-201. 2004..The majority of technologists had suffered multiple episodes of pain. Fifty per cent of the female sample and both male volunteers suffered from upper extremity pain... - An electromyographic study of isokinetic axial rotation in young adultsShrawan Kumar
Department of Physical Therapy, 3 75 Corbett Hall, University of Alberta, AB T6G 2G4, Edmonton, Canada
Spine J 3:46-54. 2003..Trunk rotation is associated with over 60% of all low back injuries. However, there are gaps in the knowledge about trunk rotation... - Power spectra of sternocleidomastoids, splenius capitis, and upper trapezius in oblique exertionsShrawan Kumar
Department of Physical Therapy, 3 75 Corbett Hall, University of Alberta, Edmonton, Alberta T6G 2G4, Canada
Spine J 3:339-50. 2003..There is relatively little known concerning the spectral profile of the cervical muscles, despite the fact that neck injury and pain are quite prevalent... - Analysis of low velocity frontal impactsShrawan Kumar
Ergonomics Research Laboratory, Department of Physical Therapy, University of Alberta, 3 75 Corbett Hall, Alta, Edmonton, Canada T6G 2G4
Clin Biomech (Bristol, Avon) 18:694-703. 2003.... - A biomechanical analysis of loads on x-ray technologists: a field studyShrawan Kumar
Department of Physical Therapy, University of Alberta, Edmonton, Alberta T6G 2G4, Canada
Ergonomics 46:502-17. 2003..The action limit defined by NIOSH was exceeded by other tasks. It is also of interest that the majority of the x-ray technologists were female... - Cervical strength of young adults in sagittal, coronal, and intermediate planesS Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 3 75 Corbett Hall, Edmonton, T6G 2G4, Alberta, Canada
Clin Biomech (Bristol, Avon) 16:380-8. 2001..To measure the cervical isometric force generation capacity of men and women reliably while seated in upright neutral posture... - Effect of trunk flexion on the occupant neck response to anterolateral whiplash impactsShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
Am J Phys Med Rehabil 84:346-54. 2005..CONCLUSIONS: When the subject sits with trunk flexed out of neutral posture at the time of an anterolateral impact, the cervical muscle response is reduced compared with anterolateral impacts with the trunk in neutral posture... - Biomechanical loads and subjective stress exposure to lumber graders in sawmill industryTroy Jones
Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada
Int J Occup Saf Ergon 17:87-97. 2011..This repetitive exertion over an 8-h shift was deemed to be a significant risk factor associated with prevalent upper extremity morbidity... - Low back problems and possible improvements in nursing jobsEdgar Ramos Vieira
Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
J Adv Nurs 55:79-89. 2006.... - Cut-points to prevent low back injury due to force exertion at workEdgar Ramos Vieira
Ergonomics Research Laboratory, Department of Physical Therapy, University of Alberta, Canada
Work 27:75-87. 2006..We hope that this paper contributes to a more systematic appraisal of back force exertion at work... - Quantification of isometric cervical strength at different ranges of flexion and extensionLaxmi Suryanarayana
Faculty of Rehabilitation Medicine, Department of Physical Therapy, 3-75 Corbett Hall, Ergonomics Research Laboratory, University of Alberta, Edmonton, Canada T6G2G4
Clin Biomech (Bristol, Avon) 20:138-44. 2005..01). Males were stronger than females. The findings may assist in targeting rehabilitation goals... - Physical demands analysis of occupational tasks in neighborhood pubsTroy Jones
Faculty of Rehabilitation Medicine, Department of Physical Therapy, University of Alberta, 3 74 Corbett Hall, Edmonton, Canada T6G 2G4
Appl Ergon 36:535-45. 2005..Mean combined compression at the lumbrosacral disc in common tasks have been demonstrated to exceed the action limit described by NIOSH. Ligament strain was observed to reach as high as 18% at the lumbosacral joint... - Measures of localized spinal muscle fatigueShrawan Kumar
Department of Physical Therapy, Faculty of Rehabilitation Medicine, Faculty of Science, University of Alberta, Edmonton, Alberta, Canada
Ergonomics 49:1092-110. 2006..The regression equations developed were highly significant (p < 0.01) and they explained 96 to 98% of variance in both genders and contractions... - Ergonomics and biology of spinal rotationShrawan Kumar
Ergonomics Research Laboratory, University of Alberta, 3v-v75 Corbett Hall Edmonton, AB Canada
Ergonomics 47:370-415. 2004..Finally, the trunk rotation, being pivotal for bipedal locomotion has brought many back problems to the human race... - Measurement of angular wrist neutral zone and forearm muscle activityMircea Fagarasanu
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta Edmonton, Alta. T6G 2G4, Canada
Clin Biomech (Bristol, Avon) 19:671-7. 2004..001). CONCLUSIONS: Self selected wrist neutral posture decreased the muscle activity significantly. Placement of wrists in neutral zone is expected to reduce risk of injuries... - Comparison of ergonomic risk assessment output in four sawmill jobsTroy Jones
Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada
Int J Occup Saf Ergon 16:105-11. 2010..The quantitative ACGIH-TLV for mono-task hand work and Borg scale were worst (misclassification rates of 86 and 28% respectively)... - Musculoskeletal symptoms in support staff in a large telecommunication companyMircea Fagarasanu
City of Edmonton, Corporate Services, Edmonton, Alberta, Canada, T5J 3A3
Work 27:137-42. 2006..CONCLUSIONS: An overview of problems associated with the body parts in office work may allow targeted prevention and intervention... - Working postures: a literature reviewEdgar Ramos Vieira
Faculty of Rehabilitation Medicine, Department of Physical Therapy, University of Alberta, Edmonton, Alberta, Canada
J Occup Rehabil 14:143-59. 2004..This information will help to improve the control and rehabilitation of these highly prevalent disorders... - Comparison of ergonomic risk assessment output in a repetitive sawmill occupation: trim-saw operatorTroy Jones
University of Alberta, Faculty of Rehabilitation Medicine, Department of Physical Therapy, Edmonton, Canada
Work 31:367-76. 2008..The significant effect of posture and exertion variable definition suggests definitions taken to be interchangeable by work site evaluators are not equivalent...