4/23/2024 0 Comments Flexion x ray cervical spine![]() It cannot be assumed that end-range is a demonstration of a joint’s maximum motion, as type S constituted approximately half of the joints analysed in this study. This is the first study to categorise joints by type of motion. The average pro-directional (motion in the direction of neck motion) surplus motion was 2.41° ± 2.12° with a range of (0.07° -14.23°) for flexion and 2.02° ± 1.70° with a range of (0.04°-6.97°) for extension. For flexion 5.2% of joints and for extension 6.1% of joints concluded their motion anti-directionally (type A). For flexion 45.9% and for extension 46.8% of joints produced maximum motion at joint end-range (type C). Resultsįor flexion 48.9% and for extension 47.2% of joints produced maximum motion before joint end-range (type S). Surplus motion was then assessed in quartiles and joints were classified into type according to end-range. The motion excursions were divided into 10% epochs, from which maximum motion, end-range and surplus motion were extracted. Thirty-three subjects performed one flexion and one extension motion excursion under video fluoroscopy. Maximum motion, end-range motion and surplus motion (the difference between maximum motion and end-range) in degrees were extracted from each cervical joint. Thirty-three healthy subjects participated in the study. Secondarily to classify joints into type based on their motion and to assess the proportions of these joint types. To provide a quantitative assessment of the difference between maximum joint motion and joint end-range in healthy subjects. ![]() There have however, been representative cases of joints producing their maximum motion before end-range, but this phenomenon is yet to be quantified. In clinical diagnosis, the maximum motion of a cervical joint is thought to be found at the joint’s end-range and it is this perception that forms the basis for the interpretation of flexion/extension imaging studies. ![]()
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