Lateral curvature of spin is called:

Question

Accepted Answer

The correct option is (3):
Scoliosis is the definitive medical term for an abnormal lateral (sideways) curvature of the spine. When examining the spine from the back or front, a scoliotic spine deviates significantly from a straight vertical line, often forming a 'C' or 'S' shape. It is important to understand that scoliosis is more complex than just a simple bend; it is a three-dimensional deformity because the spine typically rotates or twists along with the side-to-side curve, causing the rib cage or back muscles to be asymmetrical. A diagnosis of true scoliosis is typically confirmed when this lateral curvature, measured by the Cobb angle on an X-ray, is 10 degrees or more.

The incorrect option is (1):
Kyphosis refers to an excessive outward or forward curvature of the thoracic (upper) spine, leading to what is commonly called 'round back' or 'hunchback.' While the spine naturally has a slight outward curve in the thoracic region, kyphosis describes an exaggerated degree of this curve. This condition is a sagittal plane deformity, meaning it affects the spine's profile when viewed from the side. Since the question specifically asks for the *lateral* (sideways) curvature, Kyphosis, which is a front-to-back deviation, is not the correct classification.

The incorrect option is (2):
Lordosis, often referred to as 'swayback,' is characterized by an excessive inward curvature of the spine, most commonly found in the lumbar (lower back) or cervical (neck) regions. Like kyphosis, this is an exaggeration of a natural spinal curve and is also viewed in the sagittal plane. Lordosis causes the pelvis to tilt forward, increasing the arch in the lower back, or pushes the neck further forward. It is, therefore, a deviation in the front-to-back plane, not the lateral or side-to-side plane, and cannot be used to describe the condition mentioned.

The incorrect option is (4):
Spondalytes is a term that may be a misspelling of Spondylitis or Spondylolisthesis. Spondylitis refers to the inflammation of one or more vertebrae, often associated with a type of arthritis. Spondylolisthesis describes the condition where one vertebra slips forward over the vertebra below it. Neither of these terms is used to describe the overall geometric type of *lateral curvature* of the spine. They are classified as pathologies or structural issues of the vertebral column itself, not the description of the spine's sideward curve.