The effect on forearm and shoulder muscle activity in using different slanted computer mice

Chen, Han-Ming; Leung, Chun-Tong

doi:10.1016/j.clinbiomech.2007.01.006

Cited by 37 publications

(16 citation statements)

References 25 publications

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“…When using the heavy mouse for a right side stroke, the subjects moved the mouse with the thumb base so as to increase the forearm pronation, which concurrently increases the ulnar deviation due to the changes in the length of the forearm extensors (Horii et al 1993). During the left side stroke, the wrist flexion was slightly involved to increase the dragging force, and the horizontal component of the wrist motion back to radial side was reduced (Chen and Leung 2007). The net effect of the two stroke motions could have resulted in the ulnar-shifted pattern in the mouse 190G trial.…”

Section: Discussionmentioning

confidence: 97%

The weight of computer mouse affects the wrist motion and forearm muscle activity during fast operation speed task

2011

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The frequent use of the computer mouse was reported to be associated with the development of the musculoskeletal disorders in the wrist, forearm, and shoulder regions. This study was to examine the effect of the mouse weights and operation speeds on the wrist motion and muscle activity. 25 subjects (20 males and 5 females) were instructed to repetitively point-and-click the mouse between two targets displaced in the monitor with five different weighted mice (weights around 70, 100, 130, 160, and 190 g) at the fast (50 repetition/min) and slow (25 repetition/min) operation speeds. Surface electromyographic activity of the extensor carpi radialis, extensor carpi ulnaris, extensor digitorum, and upper trapezius muscles were recorded, and the electrogoniometer was used to register the wrist motions. The results showed that the maximal ulnar deviation was not significantly different among the examined conditions. The wrist movement range and the forearm muscle activities showed a V-shape tendency with the lowest value in the mouse weight of 130 g. This tendency was diminished during the slow speed tasks. The results suggested that the proper mouse weight could benefit the users in terms of increasing the movement efficiency and decreasing the muscular costs.

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Section: Discussionmentioning

confidence: 97%

The weight of computer mouse affects the wrist motion and forearm muscle activity during fast operation speed task

2011

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“…A quantitative analysis on this learning is presented in Section 3.4. This vertical mouse requires a neutral hand position, compared to the pronated hand position of a traditional mouse, and requires different muscle activity in the forearm and wrist (e.g., Chen & Leung, 2007;Gustafsson & Hagberg, 2003). Also, it is reported that providing instruction (learning) is needed to enhance the ergonomic benefits arising from the alternative mouse (Houwink, Oude Hengel, Odell, & Dennerlein, 2009).…”

Section: The Two Modality Groupsmentioning

confidence: 95%

Learning, Forgetting, and Relearning for Keystroke- and Mouse-Driven Tasks: Relearning Is Important

Kim

Ritter

2014

Human–Computer Interaction

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We investigate performance change arising through learning, forgetting, and relearning. Participants learned a spreadsheet task with either keystrokedriven (keyboard, n D 30) or mouse-based menu-driven (mouse, n D 30) commands. Their performance confirmed the power law of practice. The keyboard users learned to complete the task faster than the mouse users on the last learning session (Day 4). At a 6-day retention interval, the mouse users were observed to forget more-they took more time to complete the task than the keyboard users. Of interest, the participants in the two modality groups showed no reliable differences in their forgetting under the retention of 12 and 18 days. With additional practice, the mouse group users with the 6-day retention relearned more-they reliably reduced the time to complete the task in comparison to the paired keyboard group. These results help understand why people may choose to use a mouse-driven graphical user interface rather than a keystroke-driven interface: People choosing to use a mouse-based menu-driven interface may not need to use a knowledge-in-the-head strategy but knowledge-in-the-world, and may be doing so because this strategy provides better relearning, rather than because it is faster or easier initially or because it is better for learning or forgetting. These results provide a richer explanation of why menu-driven interfaces (knowledge-in-the-world) are more ubiquitous and suggests when they can be replaced, for example, where use is infrequent but often enough that forgetting does not substantially occur. Our results provide preliminary suggestions for choosing optimal training strategies and supporting these strategies in terms of the three stages of learning and forgetting. ) is a cognitive scientist with an interest in human-computer interaction and cognitive modeling; he is a Research Scientist at the University of Central Florida. Frank E. Ritter (frank.ritter@psu.edu) is a cognitive scientist with an interest in human-computer interaction and cognitive modeling; he is a Professor in the College of Information Sciences and Technology, and in CSE and Psychology at the Pennsylvania State University.Color versions of one or more of the figures in the article can be found online at www.tandfonline. com/hhci.

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“…Alternative input devices that promote a more neutral forearm posture (less pronation) are found to reduce pain in the upper extremity (Aarås, Dainoff, Ro, & Thoresen, 2001). Other studies found reduced forearm muscle activity and more neutral postures when participants used a computer mouse that promoted less forearm pronation (Chen & Leung, 2007;Gustafsson & Hagberg, 2003).…”

Section: Introductionmentioning

confidence: 99%

Providing Training Enhances the Biomechanical Improvements of an Alternative Computer Mouse Design

Houwink¹,

Hengel²,

Odell

et al. 2009

Hum Factors

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Objective: The purpose of this study is to determine if an alternative mouse promotes more neutral postures and decreases forearm muscle activity and if training enhances these biomechanical benefits. Background: Computer mouse use is a risk factor for developing musculoskeletal disorders; alternative mouse designs can help lower these risks. Ergonomic training combined with alternative input devices could be even more effective than alternative designs alone. Methods: Thirty healthy adults (15 males, 15 females) performed a set of computer mouse tasks with a standard mouse and an alternative mouse while an electromagnetic motion analysis system measured their wrist and forearm postures and surface electromyography measured the muscle activity of three wrist extensor muscles. Fifteen participants received no training on how to hold the alternative mouse, whereas the remaining 15 participants received verbal instructions before and during use of the alternative mouse. Results: The alternative mouse was found to promote a more neutral forearm posture compared with the standard mouse (up to 11.5° lower forearm pronation); however, pronation was further reduced when instructions on how to hold the mouse were provided. Wrist extensor muscle activity was reduced for the alternative mouse (up to 1.8% of maximum voluntary contraction lower) compared with the standard mouse, but only after participants received instructions. Conclusion: The alternative mouse design decreased biomechanical exposures; however, instructions enhanced this potential ergonomic benefit of the design. Application: User knowledge and training are important factors when effectively implementing an alternative ergonomic device.

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The effect on forearm and shoulder muscle activity in using different slanted computer mice

Cited by 37 publications

References 25 publications

The weight of computer mouse affects the wrist motion and forearm muscle activity during fast operation speed task

The weight of computer mouse affects the wrist motion and forearm muscle activity during fast operation speed task

Learning, Forgetting, and Relearning for Keystroke- and Mouse-Driven Tasks: Relearning Is Important

Providing Training Enhances the Biomechanical Improvements of an Alternative Computer Mouse Design

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