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What is structure of saddle joint

Asked by studysrinath 1st July 2017, 9:20 PM
Answered by Expert
Answer:

Structure:

  • 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.

Functions:

  • 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. 

Examples:

  • The metacarpal and carpal of thumb articulate by a saddle joint.
Answered by Expert 3rd July 2017, 10:51 AM
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