disorders. What are computer-related cumulative trauma disorders ? Cumulative trauma disorders affect the nerves, muscles, ligaments, tendons, joints or cartilage and can be due... sitting in the same position for hours at a time. You don t have to be at the computer but a few hours a day to be at risk for developing costly and painful cumulative trauma... does not cause all such disorders. But continuous and extended computer use, especially in awkward postures, may cause them, as well as aggravate an existing non-work related...