Many different diseases and conditions can affect a person’s gait and lead to problems with walking or bipedal motion. Some common problems include: • Abnormal development of the muscles or bones • Arthritis of the hips, knees, ankles, feet • Cerebellar disorders affect the way the brain controls coordination and balance • Foot problems, including corns, calluses, sores & warts • Infections • Injuries, such as fractures, sprains, and tendinitis • Movement disorders, such as Parkinson's disease • Neurologic diseases, including multiple sclerosis & nerve disorders • Vision problems