Scoliosis were made possible at the turn of the 20th century. During this time, many schools subjected their students to physical examinations and posture tests. Students were believed to suffer from negative effects such as poor posture due to hunching over desks for hours in the classroom. Although these screenings were not intended to detect spinal curvature, physicians diagnosed many students with scoliosis. Scoliosis was considered a disease-based condition during the mid-20th century caused by tuberculosis or poliomyelitis. These diseases responsible for causing spinal deformities were successfully managed throughout the 1960s due to the distribution of vaccines and antibiotics. Despite the
Supernumerary body part considered to have lost much or all of their original function through evolution. These body parts can be classed as additional to the required functioning of the body. In human anatomy the vermiform appendix is sometimes classed as a vestigial remnant. Prosthesis is an artificial extension that replaces a body part, and cybernetics is the study of computer technology in relation to organisms which can include replacement or additional body parts. Body integrity identity disorder (BIID) is a psychiatric disorder in which a person thinks that they have one or more additional limbs than they should, despite having two arms