Nonspecific work-related upper extremity disorders.

The incidence of work-related repetitive motion disorders has increased rapidly during the past 20 years. While it appears that psychosocial factors have contributed largely to the increasing incidence of these disorders, ergonomic factors and other medical conditions also play a role. The most common single diagnostic category of work-related upper extremity disorders is likely to be nonspecific. The presentation and physical findings in patients with these regional myofascial pain syndromes are often characteristic. In most cases, no measurable tissue damage or inflammatory response is found. A traditional medical approach that reduces risk factors, provides symptomatic treatment and utilizes rehabilitative techniques is usually effective in maintaining productivity in patients with nonspecific repetitive motion disorders and, thus, minimizes the personal and economic impact of these disorders.