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Erschienen in: European Journal of Applied Physiology 1/2011

01.01.2011 | Original Article

Eye-lens accommodation load and static trapezius muscle activity

verfasst von: H. O. Richter, T. Bänziger, M. Forsman

Erschienen in: European Journal of Applied Physiology | Ausgabe 1/2011

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Abstract

The purpose of this experimental study was to investigate if sustained periods of oculomotor load impacts on neck/scapular area muscle activity. The static trapezius muscle activity was assessed from bipolar surface electromyography, normalized to a submaximal contraction. Twenty-eight subjects with a mean age of 29 (range 19–42, SD 8) viewed a high-contrast fixation target for two 5-min periods through: (1) −3.5 dioptre (D) lenses; and (2) 0 D lenses. The target was placed 5 D away from the individual’s near point of accommodation. Each subject’s ability to compensate for the added blur was extracted via infrared photorefraction measurements. Subjects whose accommodative response was higher in the −D blur condition (1) showed relatively more static bilateral trapezius muscle activity level. During no blur (2) there were no signs of relationships. The results indicate that sustained eye-lens accommodation at near, during ergonomically unfavourable viewing conditions, could possibly represent a risk factor for trapezius muscle myalgia.
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Metadaten
Titel
Eye-lens accommodation load and static trapezius muscle activity
verfasst von
H. O. Richter
T. Bänziger
M. Forsman
Publikationsdatum
01.01.2011
Verlag
Springer-Verlag
Erschienen in
European Journal of Applied Physiology / Ausgabe 1/2011
Print ISSN: 1439-6319
Elektronische ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-010-1629-x

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