Titre : | Surface Electromyography of the Trapezius and Sternocleidomastoid during Computer Work with Presbyopic Corrections |
Type de document : | article de périodique |
Auteurs : | Oliver Kolbe ; Kathrin Bitterlich ; Johanna Lahne ; Stephan Degle ; Christoph Anders |
Année de publication : | 2022 |
Langues : | Français (fre) |
Descripteurs (mots clés) : | [Thésaurus Mesh]Cou [Thésaurus Mesh]Électromyographie [Thésaurus Mesh]Épaule [Thésaurus Mesh]Études croisées [Thésaurus Mesh]Ordinateurs [Thésaurus Mesh]Presbytie [Thésaurus Mesh]Santé au travail [Thésaurus Mesh]Temps passé sur les écrans [Thésaurus Mesh]Tonus musculaire [Thésaurus Mesh]Vision oculaire
|
Mots-clés : | lentilles de contact multifocales (MFCL) |
Résumé : | SIGNIFICANCE
During computer work in controlled laboratory conditions, wearing multifocal contact lenses (MFCLs) showed no lower muscle load but increased subjective perception of comfort with equivalent visual quality and comparable tolerance.
PURPOSE
Because musculoskeletal complaints are frequent among computer workers, this study used the muscle electrophysiological activity of shoulder and neck muscles in presbyopic computer workers who received either progressive addition lenses for general purpose (GP-PALs) or MFCLs.
METHODS
For this crossover study, 11 presbyopic computer workers aged 55 ± 4 years (mean ± standard deviation) were equipped with GP-PALs and MFCLs in a randomized order. Surface electromyography signals were recorded bilaterally from shoulder and neck muscles during short-term computer work tasks using an optimally adjusted visual display unit workplace. The amplitude probability distribution function, the number and total duration of EMG gaps, and sustained low-level muscle activity periods of the surface electromyography signals were calculated. Comfort and correction type preferences were assessed. Head inclination was objectively evaluated.
RESULTS
Multifocal contact lenses elicited no significant lower muscle load than GP-PALs. The number of sustained low-level muscle activity periods longer than 60 seconds was similar between visual aids. The total amount of gaps was significantly higher with MFCLs (44 gaps) compared with progressive addition lenses for general purpose (15 gaps) in all analyzed periods for all participants. However, there were no significant differences for the median in the intraindividual comparisons (P = .22, dz = 0.52). Multifocal contact lenses scored statistically significant higher in comfort values with equivalent visual quality and comparable tolerance (P = .003, dz = 1.51).
CONCLUSIONS
Although the study failed to show clear results, wearing MFCLs seems to enhance working comfort compared with GP-PALs subjectively. |
Permalink : | https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= |