Split personality
Multiple personality disorder, a neurosis in which the personality becomes dissociated into two or more distinct parts each of which becomes dominant and controls behavior from time to time to the exclusion of the other parts. A modern name for this condition is dissociative identity disorder.
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- Split-hand/split-foot malformation
A genetic malformation syndrome of the limbs with syndactyly, median clefts of the hands and feet, and aplasia (failure of development) and/or hypoplasia (underdevelopment) of the phalanges (the digits), the metacarpals (the bones leading up to the fingers), and the metatarsals (the bones leading up to the toes). The split-hand/split-foot malformation (SHFM) involves ectrodactyly (the […]
- Spock, Benjamin
(1903-1998) American pediatrician whose book on “Baby and Child Care” which first appeared in 1946 was one of the biggest best-sellers of all time. It sold some 50 million copies. Its revolutionary message to parents was that “you know more than you think you do.” Spock gently coached parents to trust their “own common sense. […]
- Spondylitis
Inflammation of one or more of the vertebrae of the spine. Diffuse inflammation of the spine is seen, for example, in the disease ankylosing spondylitis. Localized spondylitis is seen with infections of a certain area of the spine, such as in Pott’s disease (tuberculosis of the spine).
- Spondylolisthesis
Forward movement of one vertebra in relationship to an adjacent vertebra.
- Spondylolysis
The breaking down (dissolution) of a portion of a vertebra. The affected portion of the vertebra is a bone segment called the pars interarticularis, which can separate. Spondylolysis can be a cause of abnormal movement of the spine (spondylolisthesis) and lead to localized back pain.