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DAA Exam 1 Practice
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The sternoclavicular joints are best described as which term?
Multiaxial
Synovial
Sellar
Saddle
Reveal Answer
Correct Answer:
Saddle
Explanation:
The shape of the joint surfaces defines its movement. The sternoclavicular joint has saddle-shaped articular surfaces, with one surface convex in one direction and concave in the other, allowing movement in two planes (lifting–lowering and sliding forward–backward) and a bit of rotation as the shoulder moves. This makes it best described as a saddle joint. Synovial is a broader category, and while the joint is synovial, the most specific term is saddle. Sellar is just another word for saddle, but “saddle” is the standard term used.
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