Alternative Computer Mouse Design and Testing to Reduce Finger Extensor Muscle Activity During Mouse Use

Lee, David L.; Fleisher, Jacob; McLoone, Hugh; Kotani, Kazuhiko; Dennerlein, Jack T.

doi:10.1518/001872007x215665

Cited by 33 publications

(18 citation statements)

References 26 publications

(32 reference statements)

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“…The 18 postures (2 wrist Â 9 finger) were chosen in a typical range of motion when using a computer input device (Lee et al, 2007). For 301 wrist extension, the posture was achieved by raising the elbow by placing a rigid block of 301 under the forearm and elbow.…”

Section: Measuring Passive Fingertip Forcementioning

confidence: 99%

Estimating in vivo passive forces of the index finger muscles: Exploring model parameters

Qin

Lee

et al. 2010

Journal of Biomechanics

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Section: Measuring Passive Fingertip Forcementioning

confidence: 99%

Estimating in vivo passive forces of the index finger muscles: Exploring model parameters

Qin

Lee

et al. 2010

Journal of Biomechanics

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“…Lee et al examined the ECU, FDS, FDI, EDC, and ECR muscles [5]. Dennerlein et al studied the ECU, ECR, FCU, FCR, anterior deltoid, and middle deltoid muscles, and the upper trapezius [6].…”

Section: Introductionmentioning

confidence: 99%

“…The ECR and ECU muscles in the wrist and the ED muscle in the fingers have most been evaluated while working with a mouse [8]. These muscles are at higher risk of musculoskeletal disorders when working with a mouse [5]. EMG signals are highly variable which can be due to the random nature of action potentials and functional differences in individuals.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Muscle Activity During Work With Trackball, Trackpad, Slanted, and Standard Mice

et al. 2019

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Mouse is one of the most important data entry devices for computers. Undesirable and prolonged postures during work with the computer mouse increase workload, muscle aches and upper extremity musculoskeletal disorders. The present study aimed to evaluate and compare muscle activity during the use of 4 types of mouse, including trackball, trackpad, slanted and standard by Electromyography (EMG). Methods: This experimental study included 15 subjects (7 men and 8 women). The electrical activity of EDC, ECU, ECR, FDS, PQ, and FDL muscles was recorded by EMG while performing a standard task with each mouse. The order of using each mouse was randomized. The obtained results were analyzed by SPSS using the measures of central tendency, Friedman's test, and Independent Samples t-test. Results: The results of assessing the electrical activity level of muscles suggested no statistically significant difference in the recorded EMG between FPL, FDS, and PQ muscles while working with the 4 mice. The electrical activity reduced in EDC, ECR, and FPL muscles with the use of slanted mouse, compared to that of other mice (P<0.05). Discussion: There was no significant differences between the electrical activity of FDS, FPL, and PQ muscles during work with the studied mice. Furthermore, the activity of EDC, ECR, and FPL muscles reduced during work with a slanted mouse, compared to the other types. The habit of using a new mouse can affect the level of muscle activity; thus, the use of a slanted mouse may reduce the incidence of musculoskeletal disorders in the wrist and hand of users in the long run.

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“…When users take advantage of these data‐entry systems, the possible risk factors related to musculoskeletal disorders (MSDs) result from the pronounced ulnar deviation of the wrist, localized contact stress, and repeated and sustained exertion (Armstrong, Radwin, Hansen, & Kennedy, ; Kong, Jang, & Freivalds, ). Some attempts have been made to optimize the design of the keyboard and mouse in desktop PCs with the aim of preventing MSDs (Gerard, Jones, Smith, Thomas, & Wang, ; Khalaf, Karwowski, Quesada, & Sherehiy, ; Lee, Fleiser, McLoone, Kotani, & Dennerlein, ), but there have been few such studies related to laptop PCs. In this study, we focus on the positions of the touchpad and click‐buttons rather than the keyboard design, because there is no difference between the keyboard for a desktop PC and a laptop PC.…”

Section: Introductionmentioning

confidence: 99%

Placement of a touchpad and click‐buttons to relieve arm fatigue and discomfort in a laptop PC

Han

Kim

2016

Hum Ftrs & Erg Mfg Svc

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We investigated the muscle fatigue and degree of discomfort for seven combinations of positions in a touchpad and two click‐buttons (one hand: center, midright, and right in position of touchpad and buttons; two hands: all centered, centered touchpad and left buttons, right touchpad and centered buttons, and right touchpad and left buttons) while using a laptop PC. Sixteen subjects participated in tasks involving the operation of a touchpad and two click‐buttons. The muscle fatigue was evaluated by applying median frequency electromyography (EMG) for 5 minutes to the subjects while they were performing each task, and the overall degree of discomfort was measured by fuzzy logic questions after the completion of each condition. When using only one hand, the right position resulted in the lowest muscle fatigue and degree of discomfort in comparison with the other conditions (p < .05). When using two hands, the right placement of the touchpad and the left one of the buttons showed the lowest results in both the muscle fatigue and degree of discomfort (p < .05). On the other hand, the traditional centered locations in the case of both one hand and two hands were the most disadvantageous for the shoulder and wrist. The results indicate that the traditional location of the touchpad and click‐buttons in the center induced abduction in both the shoulder and the wrist, which was expressed as an increase in muscle fatigue and overall discomfort. Therefore, developing a configuration in which it is possible to adjust the positions of the touchpad and buttons based on the user's preference is required.

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Alternative Computer Mouse Design and Testing to Reduce Finger Extensor Muscle Activity During Mouse Use

Abstract: Potential applications of this study include ergonomic and human computer interface design strategies in reducing the exposure to risk factors that may lead to upper extremity musculoskeletal disorders.

Cited by 33 publications

References 26 publications

Estimating in vivo passive forces of the index finger muscles: Exploring model parameters

Estimating in vivo passive forces of the index finger muscles: Exploring model parameters

Evaluating Muscle Activity During Work With Trackball, Trackpad, Slanted, and Standard Mice

Placement of a touchpad and click‐buttons to relieve arm fatigue and discomfort in a laptop PC

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