Cervicobrachial muscle response to cognitive load in a dual-task scenario

Article Abstract:

The impact of cognitive load in office-type tasks on physical-stress response, using a dual-task paradigm involving a primary cognitive task and secondary typing task is assessed. The results demonstrate that the primary task causing the highest level of perceived workload also produced 61% higher muscle activity in the right trapezius and 6 and 11% higher activity in the left and right cervical erector spinae respectively in comparison to muscle activity associated with the cognitive task.

Usage, Influence, Muscle contraction, Cognition, Paradigms (Social sciences)

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Occupational risk factors associated with soft tissue disorders of the shoulder: a review of recent investigations in literature

Article Abstract:

From 1987 to 1989, a 100% rise in traumatic cumulative illness was reported in the United States. Shoulder pain ranked second only to low back pains. Ergonomic controls are necessary to reduce the number of shoulder pain cases. Fast, highly repetitive tasks and obstructive movements should be eliminated. Shoulder flexion, abduction, direct load bearing activities and hand-held weight should be lessened. Rest breaks, even for brief periods, had been shown to have advantageous effects.

Research, Occupational health and safety, Occupational safety and health, Risk factors, Repetition strain injury, Risk factors (Health), Cumulative trauma disorders, Shoulder

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Significance of biomechanical and physiological variables during the determination of maximum acceptable weight of lift

Article Abstract:

The biomechanical and physiological variables linked with the decision to change the weight of lift during the determination of a maximum acceptable weight of lift (MAWL), were identified. Heart rate, velocities, accelerations and trunk position were recorded. Results suggest that heart rate, predicted sagittal lift moment and low back disorder were linked with decreases in the weight prior to the next lift.

Materials handling, Backache, Back pain

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