Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve

Ping Yeap Loh; Wen Liang Yeoh; Satoshi Muraki

doi:10.1007/978-3-319-96083-8_33

Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve

Ping Yeap Loh, Wen Liang Yeoh, Satoshi Muraki

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

Carpal tunnel syndrome is a symptomatic compression neuropathy of the median nerve as it travels through the wrist. Several factors such as wrist angle and finger posture cause a change of the intra-carpal tunnel pressure. Carpal tunnel syndrome is one of the most commonly reported work-related musculoskeletal disorders. Computer users are at higher risk of upper extremity musculoskeletal symptoms and work-related musculoskeletal disorders, since time spent on the computer is associated with a higher incidence of musculoskeletal disorders. Objective: to investigate the impact of typing at two keyboard slopes (0° and +20°) on the median nerve deformation ratio. Fifteen healthy young men (24.8 ± 2.3 years) were recruited to type using both 0° and +20° inclined keyboards. The participants performed four 30-min blocks of computer typing at 0° and +20° keyboard inclinations. The left wrist median nerve was examined with an ultrasound machine after each 30-min typing block. Two-way repeated analysis of variance was performed to examine any differences in the deformation ratio of the median nerve cross-sectional area. The four time blocks and two keyboard slope conditions (0° and +20° inclination) were used as factors. Continuous typing activity causes a significant increase in the median nerve cross-sectional area deformation ratio (p < 0.05). Ultrasonography examination of the median nerve following computer typing can be used to generate absolute measurements and deformation ratios. These measurements help provide a better understanding of the impact of typing tasks on the median nerve.

Original language	English
Title of host publication	Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III
Subtitle of host publication	Musculoskeletal Disorders
Editors	Riccardo Tartaglia, Sara Albolino, Thomas Alexander, Sebastiano Bagnara, Yushi Fujita
Publisher	Springer Verlag
Pages	250-254
Number of pages	5
ISBN (Print)	9783319960821
DOIs	https://doi.org/10.1007/978-3-319-96083-8_33
Publication status	Published - 2019
Event	20th Congress of the International Ergonomics Association, IEA 2018 - Florence, Italy Duration: Aug 26 2018 → Aug 30 2018

Publication series

Name	Advances in Intelligent Systems and Computing
Volume	820
ISSN (Print)	2194-5357

Other

Other	20th Congress of the International Ergonomics Association, IEA 2018
Country/Territory	Italy
City	Florence
Period	8/26/18 → 8/30/18

All Science Journal Classification (ASJC) codes

Control and Systems Engineering
Computer Science(all)

Access to Document

10.1007/978-3-319-96083-8_33

Cite this

Loh, P. Y., Yeoh, W. L., & Muraki, S. (2019). Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve. In R. Tartaglia, S. Albolino, T. Alexander, S. Bagnara, & Y. Fujita (Eds.), Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III: Musculoskeletal Disorders (pp. 250-254). (Advances in Intelligent Systems and Computing; Vol. 820). Springer Verlag. https://doi.org/10.1007/978-3-319-96083-8_33

Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve. / Loh, Ping Yeap; Yeoh, Wen Liang; Muraki, Satoshi.
Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III: Musculoskeletal Disorders. ed. / Riccardo Tartaglia; Sara Albolino; Thomas Alexander; Sebastiano Bagnara; Yushi Fujita. Springer Verlag, 2019. p. 250-254 (Advances in Intelligent Systems and Computing; Vol. 820).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Loh, PY, Yeoh, WL & Muraki, S 2019, Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve. in R Tartaglia, S Albolino, T Alexander, S Bagnara & Y Fujita (eds), Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III: Musculoskeletal Disorders. Advances in Intelligent Systems and Computing, vol. 820, Springer Verlag, pp. 250-254, 20th Congress of the International Ergonomics Association, IEA 2018, Florence, Italy, 8/26/18. https://doi.org/10.1007/978-3-319-96083-8_33

Loh PY, Yeoh WL, Muraki S. Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve. In Tartaglia R, Albolino S, Alexander T, Bagnara S, Fujita Y, editors, Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III: Musculoskeletal Disorders. Springer Verlag. 2019. p. 250-254. (Advances in Intelligent Systems and Computing). doi: 10.1007/978-3-319-96083-8_33

Loh, Ping Yeap ; Yeoh, Wen Liang ; Muraki, Satoshi. / Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve. Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III: Musculoskeletal Disorders. editor / Riccardo Tartaglia ; Sara Albolino ; Thomas Alexander ; Sebastiano Bagnara ; Yushi Fujita. Springer Verlag, 2019. pp. 250-254 (Advances in Intelligent Systems and Computing).

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abstract = "Carpal tunnel syndrome is a symptomatic compression neuropathy of the median nerve as it travels through the wrist. Several factors such as wrist angle and finger posture cause a change of the intra-carpal tunnel pressure. Carpal tunnel syndrome is one of the most commonly reported work-related musculoskeletal disorders. Computer users are at higher risk of upper extremity musculoskeletal symptoms and work-related musculoskeletal disorders, since time spent on the computer is associated with a higher incidence of musculoskeletal disorders. Objective: to investigate the impact of typing at two keyboard slopes (0° and +20°) on the median nerve deformation ratio. Fifteen healthy young men (24.8 ± 2.3 years) were recruited to type using both 0° and +20° inclined keyboards. The participants performed four 30-min blocks of computer typing at 0° and +20° keyboard inclinations. The left wrist median nerve was examined with an ultrasound machine after each 30-min typing block. Two-way repeated analysis of variance was performed to examine any differences in the deformation ratio of the median nerve cross-sectional area. The four time blocks and two keyboard slope conditions (0° and +20° inclination) were used as factors. Continuous typing activity causes a significant increase in the median nerve cross-sectional area deformation ratio (p < 0.05). Ultrasonography examination of the median nerve following computer typing can be used to generate absolute measurements and deformation ratios. These measurements help provide a better understanding of the impact of typing tasks on the median nerve.",

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Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve

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