A CONCEPTUAL-MODEL FOR WORK-RELATED NECK AND UPPER-LIMB MUSCULOSKELETAL DISORDERS

This paper presents a conceptual model for the pathogenesis of work-re lated musculoskeletal disorders, The model contains sets of cascading exposure, dose, capacity, and response variables, such that response a t one level can act as dose at the next. Response to one or more doses can diminish or increase the capacity for responding to successive do ses. The model is used as a framework for discussing the development o f work-related muscle, tendon, and nerve disorders. It is intended as a beginning, to be modified to explain new findings as they become ava ilable. In research, it can help to identify areas needing additional data for the development and expression of work-related musculoskeleta l disorders. Researchers can use it to design laboratory and field stu dies. In practice, it demonstrates the relationship between common exp osure factors and different responses. This information can be used to evaluate and design jobs for the prevention of work-related musculosk eletal disorders.