Disability is experienced by all racial, social, economic, gender and age groups.
Another category involves physical disabilities, which include a tremendous range and variety of conditions. The term physical disabilities covers spinal cord injuries, spina bifida and other congenital malformations. It also includes amputations, arthritis, muscular dystrophy and additional musculoskeletal conditions. Many physical disabilities can take the form of mobility impairment, a highly visible type of disability. Among the less visible disability types are learning disabilities, attention deficit disorder, and chronic illness.