A sEMG-based method for assessing the design of computer mice.

Area of Science:

• Biomechanics and Ergonomics
• Human-Computer Interaction
• Neuroscience

Background:

• Repetitive computer mouse use can lead to upper extremity disorders due to awkward postures and movements.
• Ergonomic mice are developed to alleviate pain and discomfort associated with standard mouse usage.
• Objective assessment methods are needed to evaluate the efficacy of different mouse designs.

Purpose of the Study:

• To validate surface electromyography (sEMG) as a tool for assessing the design of non-keyboard input devices, specifically computer mice.
• To quantify muscle activity differences between various computer mouse designs and grasp positions.

Main Methods:

• Surface electromyography (sEMG) was used to record forearm and hand muscle activity.
• Participants performed static tasks while holding computer mice in different grasp positions.
• sEMG signal amplitude was analyzed to determine muscle activation levels.

Main Results:

• A significant reduction in pronator muscle activity was observed when using ergonomic mice compared to standard designs.
• The sEMG-based method demonstrated sensitivity to subtle design variations in computer mice.
• Hand size and grasp position significantly influenced muscle activity levels across different mice.

Conclusions:

• Surface electromyography (sEMG) is a valid and sensitive method for evaluating the biomechanical impact of computer mouse design.
• Ergonomic mouse designs can lead to reduced muscle strain during computer use.
• Designers should consider hand size and grasp variations when developing ergonomic input devices.