The Impact of Use of Dual Monitor Screens on 3D Head–Neck Posture and Activity of Neck Muscles

Nimbarte, Ashish D.; Alabdulmohsen, Rabab T.; Guffey, Steve E.; Etherton, J. R.

doi:10.1080/21577323.2012.667051

Cited by 12 publications

(26 citation statements)

References 29 publications

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“…[75] Viewing wider display spaces leads to the activation of different muscle groups [102] than viewing a single display. Nimbarte et al noted that "Increased activation of anterior neck muscles caused by asymmetrical, more rotated head-neck postures... may increase the risk of neck musculoskeletal disorders, especially with prolonged computer use" [79]. In effect, prolonged usage has the potential for profoundly negative effects.…”

Section: Physical Consequences Of Large Display Spacesmentioning

confidence: 99%

“…They can also be an ever-present aesthetic blight on workplaces and homes, are difficult to conceal when turned off, and are impossible not to notice when turned on. Use of multi-monitor arrangements has also been suggested to increase the risk of musculoskeletal disorders [79]. However some neck/head movement can protect against such disorders due to greater variation in muscle activity [27].…”

Section: Introductionmentioning

confidence: 99%

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Expanding the Bounds of Seated Virtual Workspaces

McGill

Kehoe²,

Freeman

et al. 2020

ACM Trans. Comput.-Hum. Interact.

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Section: Physical Consequences Of Large Display Spacesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Expanding the Bounds of Seated Virtual Workspaces

McGill

Kehoe²,

Freeman

et al. 2020

ACM Trans. Comput.-Hum. Interact.

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show abstract

“…For the sternocleidomastoid muscles the mean activation of 3 to 4% MVC was observed in the current study. Previous VDT studies have reported an activity of 2 to 4 % MVC (Turville et al 1998, Nimbarte et al 2013a).…”

Section: Chapter 6: Discussion and Conclusionmentioning

confidence: 95%

“…For the upper trapezius muscles, the previous VDT studies have reported activation levels of 4 to 5% MVC (Villanueva et al 1997, Turville et al 1998, Nimbarte et al 2013a). In the current study, the activation levels of 6 to 7 % MVC were observed for the upper trapezius muscles.…”

Section: Chapter 6: Discussion and Conclusionmentioning

confidence: 95%

Biomechanical Evaluation of Surgical Loupes

Holcomb¹

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Biomechanical Evaluation of Surgical Loupes Marsha (Chapman) Holcomb Cervical musculoskeletal disorders (MSDs) are a known occupational hazard in micro surgeons who use loupes (telescopes mounted on glasses) to operate, with over 80% having neck pain related to performing surgery. Despite this known occupational risk, the cause, prevention, and treatment of cervical MSDs have been largely ignored in this population. The objective of this study was to quantify I would like to express my sincerest gratitude to my advisor, Dr. Ashish D Nimbarte for providing me the opportunity to further my education and for continuing to push me to complete my studies. Your guidance, throughout my studies has been truly appreciated and have allowed me to reach this point.

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“…The work-related factors that affect the biomechanical behavior of the cervical spine include static and awkward postures, repetitive upper extremity and neck movements, and forceful arm exertions (Ariens et al 2000, Andersen et al 2007, Cagnie et al 2007, Palmer and Smedley 2007. Use of prolonged static and awkward head-neck postures is common among the occupational groups, such as VDT users, surgeons, sewing machine operators, and dentists (Hagberg and Wegman 1987, Côté et al 2009, Nimbarte et al 2013a, Nimbarte et al 2013c. Repetitive arm and neck movement constitute a major facet of workplace tasks in several industries including fishing, food processing, wholesale and retail industry, agriculture, transportation and warehousing, assembly line, service etc.…”

Section: Chapter One: Introductionmentioning

confidence: 99%

Post fatigue changes in the stability of cervical spine

Zreiqat¹

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POST FATIGUE CHANGES IN THE STABILITY OF CERVICAL SPINE Majed M. Zreiqat Musculoskeletal disorders (MSDs) of the neck or cervical spine are a common problem in the modern workforce. An annual prevalence of 30% to 50% for neck pain among the general adult population was reported by the Task Force of Bone and Joint Decade on Neck Pain. Physical work demands, such as sustained static postures, sub-maximal repetitive arm exertions, and forceful arm exertions are consistently identified as possible risk factors for cervical spine MSDs. Most of these exertions induce neck muscle fatigue which may affect the stability of the cervical spine. A less stable spine can be both a cause and consequence of spinal pain. The effect of muscle fatigue on the stability of the cervical spine is currently not well understood. The objective in this study was to quantify the post-fatigue changes and recovery of the cervical spine's stability. Specifically, the flexion-relaxation phenomenon (FRP) and sudden perturbations (SP) procedures were used to study the variables that influence the stability of the cervical spine. The FRP explains the synergistic load sharing between the muscles and viscoelastic elements (ligaments, discs, capsules, and fascia). The SP protocol allows quantification of the muscle reflex responses necessary to maintain spinal stability. Twenty human participants (10 male and 10 female) were recruited for data collection and the Sorenson protocol was utilized to induce neck muscle fatigue. Surface electromyography and optical motion capture systems were used to measure neck muscle activation and head-neck posture, respectively. A six degree of freedom force torque sensor was used to record the force profile data during the SP procedure. Localized muscle fatigue significantly reduced the flexion-relaxation ratio from 4.88 ± 0.81 pre-fatigue to 3.33 ± 0.57 post-fatigue. A post-fatigue decrease was also observed in the onset and offset angles by about 16% and 5%, respectively, resulting in an expansion of the myoelectric silence period by 17.2%. The intrinsic stiffness of cervical spine was reduced from 975.75 ± 85.87 Kg/sec 2 pre-fatigue to 826.31 ± 90.76 Kg/sec 2 post-fatigue. The corresponding change in the effective stiffness was from 1404.64 ± 122.31 Kg/sec 2 to 1086.53 ± 123.73 Kg/sec 2. The temporal parameters related to the reflexive response of the neck extensors were also affected by fatigue. Onset delay, time to peak and peak to peak values increased from 92.81

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The Impact of Use of Dual Monitor Screens on 3D Head–Neck Posture and Activity of Neck Muscles

Cited by 12 publications

References 29 publications

Expanding the Bounds of Seated Virtual Workspaces

Expanding the Bounds of Seated Virtual Workspaces

Biomechanical Evaluation of Surgical Loupes

Post fatigue changes in the stability of cervical spine

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