Cobb angle
Cobb Angle
The Cobb angle (pronounced: /kɒb ˈæŋɡəl/) is a measurement used in the field of orthopedics to quantify the magnitude of spinal deformities, particularly in the case of scoliosis, kyphosis, and lordosis. The Cobb angle is named after the American orthopedic surgeon, John Robert Cobb, who introduced the method in 1948.
Etymology
The term "Cobb angle" is derived from the name of its inventor, Dr. John Robert Cobb (1903-1967), an American orthopedic surgeon who was a pioneer in the study of spinal deformities. He introduced the Cobb angle measurement method in a paper published in 1948.
Method
The Cobb angle is calculated by drawing two perpendicular lines: one from the superior endplate of the most tilted vertebra above the curve, and the other from the inferior endplate of the most tilted vertebra below the curve. The angle where these two lines intersect is the Cobb angle.
Related Terms
- Orthopedics: The branch of medicine dealing with the correction of deformities of bones or muscles. This includes conditions like scoliosis for which the Cobb angle is used.
- Scoliosis: A medical condition in which a person's spine has a sideways curve. The curve is usually "S"- or "C"-shaped.
- Kyphosis: A spinal disorder in which an excessive outward curve of the spine results in an abnormal rounding of the upper back.
- Lordosis: The inward curvature of a portion of the lumbar and cervical vertebral column.
- Vertebra: Each of the series of small bones forming the backbone, having several projections for articulation and muscle attachment, and a hole through which the spinal cord passes.
External links
- Medical encyclopedia article on Cobb angle
- Wikipedia's article - Cobb angle
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