What is structure of saddle joint
- A saddle joint is a type of synovial joint where one of the bones forming the joint is shaped like a saddle with the other bone resting on it like a rider on a horse.
- It is like ball and socket joint where bones can be rotated, but not very efficiently.
- The opposing surfaces are reciprocally concave-convex.
- Saddle joints provide stability to the bones while providing more flexibility than a hinge or gliding joint.
- The bone sitting on the saddle can move in an oval shape relative to the other bone, similar to a condyloid joint.
- Movements such as say, flexion, extension, adduction, abduction, and circumduction are allowed; but no axial rotation.
- The metacarpal and carpal of thumb articulate by a saddle joint.
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