Scoliosis is defined as lateral abnormal curvature of the spine. Broadly speaking, there are two types of scoliosis – nonstructural and structural
In this type of scoliosis, the spine has a lateral curvature but there is no structural abnormality in the spine. The curvature is in response to habit or a disease process.
The spine is structurally normal with a lateral curvature, no spinal rotation, and no truncal asymmetry.
Types of nonstructural scoliosis:
- Postural– This curvature is due to prolonged use of a wrong posture. It resolves when the child is lies down.
- Compensatory – It is caused by leg-length discrepancy. There is no rotation of the vertebrae and it usually goes off on sitting.
- Sciatic This curve results from trying to avoid pain from an irritated sciatic nerve
- Inflammatory: Here a curvature in the spine is caused by an infective process such as an appendicitis. The body curves in response to the disease or abdominal muscle spasm.
- Hysterical – very rare and has an underlying psychological component