Which joint allows movement in one plane only?
Correct answer: A. Elbow
- A. Elbow
- B. Shoulder
- C. Hip
- D. Wrist
Explanation
The elbow is a hinge joint, so it permits flexion and extension but no rotation, in the same way as the knee and the joints of the fingers. The shoulder and hip are ball and socket joints moving in every plane, and the wrist is a condyloid joint allowing movement in two planes. Restricting a joint to one plane is what makes it stable enough to bear load.
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About Joints
Joints are connections between bones that provide movement, stability or both. Coverage includes fibrous, cartilaginous and synovial joints, the structure of a synovial joint, cartilage, ligaments and synovial fluid, and the difference between ligaments that join bones and tendons that attach muscle to bone.
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