Cobb Angle
A standardized radiographic measurement of spinal curvature severity, expressed in degrees, used to determine the need for orthotic intervention in scoliosis management.
Full Definition
The Cobb angle is the internationally accepted radiographic method for quantifying the degree of spinal curvature in scoliosis. It is measured on a standing anteroposterior radiograph by identifying the most tilted vertebrae at the upper and lower ends of the curve and measuring the angle formed by lines drawn perpendicular to their endplates. In orthotics and orthopaedic documents, editors will frequently encounter Cobb angle values that guide clinical decisions such as bracing thresholds. 'Cobb' is always capitalised as a proper noun (named after Dr John Robert Cobb). The word 'angle' is lowercase.
Usage
Usage note: 'Cobb' is a proper noun and must always be capitalised. 'Angle' is lowercase. Express values as numerals followed by 'degrees' or the degree symbol (°). Do not write 'Cobb's angle' in modern usage.
In Context
- "A Cobb angle of 32 degrees was documented, confirming the indication for spinal bracing." — Orthopaedic assessment report
- "The proofreader ensured 'Cobb angle' retained its initial capital in accordance with eponym style conventions." — Journal article proofread