Scoliosis uses the 45 to 50° threshold as a result of the well-documented, plus or minus 5° measurement error that can occur while measuring Cobb angles. Surgeons who are specialized in spine surgery perform surgery for scoliosis. To completely straighten a scoliotic spine is usually impossible, but for the most part, significant corrections are achieved. The two main types of surgery are: One or both of these surgical procedures may be needed. The surgery may be done in one or two stages and, on average, takes four to eight hours. A 50-year follow-up study published in the "Journal of the American
Virtual body the disembodied essence of a person's mind in cyberspace and the consequent representation of a person's identity as a virtual body in cyberspace. The 'disembodiment' discourse focuses around allowing the mind to wander without the physical inhibitions of the body. This discourse is regarded as an expansion of classic theories such as astral projection or 'out-of-body experiences'. Subsequently, the virtual body is regarded as psychologically created essence that is virtually floating between information. This information in turn, according to theories, affects the mind and the virtual body but has no interaction with the physical body, which has deployed a "technological