In 1877, Massachusetts passed the Nation's first factory inspection law. It required guarding of belts, shafts, and gears, protection on elevators, and adequate fire exits. Its passage prompted a flurry of State factory acts.
These muscles can cause pain in the right upper back after injuries, such as a muscle strain or bruise from a car accident or fall. Overuse from work or recreational activities, such as painting or playing racket sports, might also be to blame -- especially for people who are right handed.
Numerous conditions can cause pain in the right upper abdomen. According to the Merck Manuals Online Medical Library, pain that manifests in the abdomen, including the right upper abdominal quadrant, can be caused by the viscera or abdominal organs, structures outside the abdomen or the parietal peritoneum -- the membrane that lines the abdominal wall.