Journal
APPLIED ERGONOMICS
Volume 39, Issue 1, Pages 107-113Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apergo.2006.12.008
Keywords
finger behaviour; computer mouse use; finger lifting prevalence
Categories
Funding
- NIOSH CDC HHS [T42 OH008416-01] Funding Source: Medline
- NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH [T42OH008416] Funding Source: NIH RePORTER
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Two-button computer mouse users may exhibit sustained, static finger lifting behaviours to prevent inadvertent activations by avoiding finger pressure on the buttons, which leads to prolonged, static finger extensor muscle loading. One hundred graduate students were observed during normal computer work in a university computer facility to qualify and quantify the prevalence of lifted finger behaviours and extended finger postures, as well as wrist/forearm and grip behaviour, during specific mouse activities. The highest prevalences observed were 48% of the students lifted their middle finger during mouse drag activities, and 23% extended their middle finger while moving the mouse. In addition, 98% of the students rested their wrist and forearm (77%) or wrist only (21%) on the workstation surface, and 97% had an extended wrist posture (15-30) when using the mouse. Potential applications of these findings include future computer input device designs to reduce finger lifting behaviour and exposures to risk factors of hand/forearm musculoskeletal pain. (C) 2007 Elsevier Ltd. All rights reserved.
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