Surface electromyography and mouse use position

Article Abstract:

A study was conducted on muscle tension caused by mouse and trackball use position. Seventeen computer users were instructed to use the mouse and trackball with their right hand in the experiment. Muscle tension in the four muscle groups and surface electromyography were recorded when the subjects used a trackball below the keyboard's center and a mouse to the right of the keyboard during one-minute trials. Results indicate that a computer pointing device should be placed in a position more central to the body to prevent muscular discomfort and injury.

Usage, Keyboards (Electronics), Keyboards (Computers), Mouse devices (Computers), Mice (Computer peripherals)

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Attention-related muscle activity in different body regions during VDU work with minimal physical activity

Article Abstract:

Short interruptions in the electromyography (EMG) activity pattern suppress the development of trapezius myalgia while performing a visual display unit based task requiring continuing attention. Attention-related muscle activity is high in the frontalis site and the upper trapezius. EMG activity slows down in a caudal direction and is low in the extremities except in the hand and foot extensor muscles. Moreover, EMG activity is higher in the cranially located muscles, except the gastrocnemius of the left leg and the extensors of the left hand.

Analysis, Observations, Muscles, Extremities (Anatomy), Trapezius muscle

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Cognitive performance and muscle activation in workers with chronic shoulder myalgia

Article Abstract:

Research is presented that investigates whether there is any impairment in elevated muscle activation and cognitive performance in workers with chronic shoulder myalgia.

Measurement, Shoulder pain, Cognition

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