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Träfflista för sökning "WFRF:(Mathiassen Svend Erik) srt2:(2005-2009)"

Sökning: WFRF:(Mathiassen Svend Erik) > (2005-2009)

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  • Arvidsson, Inger, et al. (författare)
  • Are neck-shoulder disorders associated with habitual neck extension in computer work?
  • 2006
  • Ingår i: Meeting diversity in ergonomics.
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • A common clinical conception is that prolonged neck extension during computer work is associated with an increased risk of neck-shoulder disorders. The aim of this study was to find out whether neck postures in computer work differed between females cases with neck-shoulderdisorders, compared to healthy referents. Based on physical examinations, 13 cases and 11 referents were selected among 70 female air traffic controllers with the same computer work and identical work stations. Neck angles were measured by inclinometry, during an ordinary work period of about 1 h. Results: Average neck angles (50thpercentile) in cases and referents was -10° (SP 8) and -9 (SD 10) respectively; p=0.9. Hence, we did not find any association between neck-shoulder disorders and neck extension during computer work.
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  • Arvidsson, Inger, et al. (författare)
  • Changes in physical workload with implementation of mouse-based information technology in air traffic control
  • 2006
  • Ingår i: International Journal of Industrial Ergonomics. - : Elsevier BV. - 0169-8141 .- 1872-8219. ; 36:7, s. 613-622
  • Tidskriftsartikel (refereegranskat)abstract
    • Effects on physical workload were quantified when introducing new information technology in air traffic control. Seven female and 7 male air traffic controllers were studied in an old control system, and during simulated-but similar-work in a new, mouse-based system. Postures, movements and muscular load were recorded (inclinometry for head, neck, back and upper arms; goniometry for wrists; elect romyography for the trapezius and forearm extensor muscles). The new system was associated with lower movement velocities than the old one (examples: [50th percentiles] head flexion: 2 vs. 5 degrees/s, P < 0.01; right arm elevation: 3 vs. 6 degrees/s; P < 0.01; [90th percentile] wrist flexion: 19 vs. 50 degrees/s, P < 0.01), less varying postures (head: 95th-5th percentile range 17 degrees vs. 34 degrees; P < 0.01), and less muscular rest in the right forearm extensors (3.5% vs. 9% of time; P < 0.05). The old/new system differences were amplified at high work intensities. The new air traffic control system caused a major change of physical exposures, probably associated with an increased risk of musculoskeletal disorders in arms and hands. Relevance to industry While this study concerned the specific changes in the introduction of a new air traffic control system, we believe that the findings are applicable to similar technological developments in other settings. (c) 2006 Elsevier B.V. All rights reserved.
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  • Arvidsson, Inger, et al. (författare)
  • Neck postures in air traffic controllers with and without neck/shoulder disorders.
  • 2008
  • Ingår i: Applied Ergonomics. - : Elsevier BV. - 1872-9126 .- 0003-6870. ; 39:2, s. 255-260
  • Tidskriftsartikel (refereegranskat)abstract
    • Prolonged computer work with an extended neck is commonly believed to be associated with an increased risk of neck–shoulder disorders. The aim of this study was to compare neck postures during computer work between female cases with neck–shoulder disorders, and healthy referents. Based on physical examinations, 13 cases and 11 referents were selected among 70 female air traffic controllers with the same computer-based work tasks and identical workstations. Postures and movements were measured by inclinometers, placed on the forehead and upper back (C7/Th1) during authentic air traffic control. A recently developed method was applied to assess flexion/extension in the neck, calculated as the difference between head and upper back flexion/extension. Results: cases and referents did not differ significantly in neck posture (median neck flexion/extension: −10° vs. −9°; p=0.9). Hence, the belief that neck extension posture is associated with neck–shoulder disorders in computer work is not supported by the present data.
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