A progressive decline in central nervous system function leads to a loss of proprioception, balance and overall motor coordination, as well as a reduction in eye–hand coordination, reaction time and an unsteady gait.[2] These degenerative changes are often accompanied by osteoarthritis (degenerative joint disease), which leads to a reduction in the range of motion of the head, neck and extremities. Furthermore, elderly people frequently take multiple medications for control of various diseases and conditions. The side effects of some of these medications may either predispose to injury, or may cause a minor trauma to result in a much more severe condition.