Work Related Upper Limb Disorders
Thomas J. Armstrong
The University of Michigan
Ann Arbor, MI 48109
Copyright © 2002, Thomas J. Armstrong
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![]() Figure 1a: Fingers supporting weight of tool box |
![]() Figure 1b: Mucles in forearm contract to flex fingers against weight of tool box |
![]() Figure 1c: Contraction of muscles in forearm cause tendons to rub against sides of carpal tunnel |
Characteristics of fatigue include:
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As a general rule, workers should not be experiencing symptoms from the previous days at the beginning of their work shift. Persistence of such symptoms indicates that there may be something more seriously wrong than fatigue from an "honest day of work."