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Related Experiment Videos

Variation in upper limb posture and movement during word processing with and without mouse use

L Karlqvist1, M Hagberg, K Selin

  • 1Department of Occupational Health, Karolinska Hospital, Stockholm, Sweden.

Ergonomics
|July 1, 1994
PubMed
Summary

Computer mouse use in word processing leads to strenuous upper limb postures. Mouse operators experienced significant wrist deviation and shoulder rotation compared to non-mouse users, highlighting ergonomic risks.

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Area of Science:

  • Occupational Health
  • Ergonomics
  • Human-Computer Interaction

Background:

  • Repetitive computer work can lead to musculoskeletal discomfort.
  • The use of computer mice is prevalent in word-processing tasks.
  • Understanding work postures is crucial for preventing occupational injuries.

Purpose of the Study:

  • To analyze and compare upper limb work postures between mouse and non-mouse computer operators.
  • To identify potential ergonomic risks associated with mouse usage during word processing.

Main Methods:

  • Observational study comparing 12 mouse operators and 12 non-mouse operators.
  • Measurements of upper limb postures during text correction tasks.
  • Analysis of wrist deviation and shoulder rotation angles.

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Main Results:

  • Mouse operators exhibited significant ulnar wrist deviation (64% of working time) and outward shoulder rotation (>30 degrees for 81% of time).
  • Non-mouse operators maintained neutral wrist positions and inward shoulder rotation.
  • Mouse operators performed more extensive text correction within the observation period.

Conclusions:

  • Mouse usage in word processing is associated with prolonged strenuous working postures.
  • Further research is needed on word-processing techniques and ergonomic workstation design for mouse and alternative input devices.