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Scoliosis (Curved Spine)

  • Posted on- Dec 04, 2015
  • 411 Views

Scoliosis is not a disease. It is a condition in which there is an abnormal sideways curvature in the spine. Any part of the spine can bend but the most common parts that get affected are the chest (upper back) area or the lower part of the back. The spine can curve to the right, left or sometimes both the sides. The curve can occur in varying degrees, which determines the severity of the condition. When the curve occurs in the lumbar (lower) region of the spine, it does not affect the posture. However, the curve in the thoracic (upper) region causes a twist in the rib cage, which makes the misalignment of the body more visible. If the curve gets worse, the spine may rotate or even twist. In an extreme case of scoliosis, there may be severe back pain and other vital organs like the lungs, heart may get damaged.

When scoliosis occurs, the curves of the spine can be classified on the basis of their shape in the following ways:

  • Levoscoliosis: In this type the curvature of the spine is towards left giving it the "C" shape. This type of scoliosis is considered to be the most dangerous as the heart is located in that area and may be in danger. The degree of the curve determines the severity of the disorder.
  • Dextroscoliosis: In this type the curvature is to the opposite side of levoscoliosis i.e., towards the right and looks like a backward "C". The curve is also known as lordotic curve.
  • Dextroscoliosis (forming an "S" shape): In this type of scoliosis, there are two curves in the spinal column, which result in an "S" shaped spine.

Types of scoliosis

Congenital Scoliosis
It occurs before birth while the foetus is growing in the womb. A part of one or more vertebrae, during the formation of the spine, may not form properly leading to a curved spine. Also, the spine initially forms as a single column of tissue and then separates into various bony segments called vertebrae. However, when the separation is incomplete, two or more vertebrae are fused together which stops the spinal growth from one side resulting into a spinal curve. It is a very rare condition. However, if it occurs then needs to be corrected surgically.

Neuromuscular Scoliosis
It is caused by poor muscle control or muscle weakness and illnesses that affect the nerves. A disorder called cerebral palsy may cause neuromuscular scoliosis. It is a condition wherein there is a brain damage that occurs at birth or a while later. Another illness that may result in neuromuscular scoliosis is muscular dystrophy, a genetic disorder that weakens the muscles. Certain other disorders that may cause neuromuscular scoliosis are spina bifida and polio.

Idiopathic Scoliosis
When scoliosis develops in a previously straight spine without an identifiable cause, it is known as idiopathic scoliosis. It is the most common type of scoliosis usually observed in girls. It is more common in adolescents, and gets worse as they grow. The curve may become more pronounced in the later stages of life.

Degenerative Scoliosis
It usually occurs in women above 40 years of age. Because of the deterioration of bones, the spine loses ability to maintain its normal shape and begins to sag. This results into a scoliotic curve in the spine. Degenerative scoliosis may also result from injuries or illnesses like a major back injury, osteoporosis or a traumatic bone collapse. The parts of the spine that are involved in the damage are vertebrae that support the spine and the neck, tendons that connect the bones in the spine to the muscles, discs that provide a cushion to the vertebrae and the ligaments that hold the discs and vertebrae together.

Causes of scoliosis

Doctors don't know what causes the most common type of scoliosis, although it appears to involve hereditary factors, because the disorder tends to run in families. Less common types of scoliosis may be caused by:

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