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Structure and Function of the Interosseous Membrane N188
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Structure and Function of the Interosseous Membrane N188

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Questions and Answers

What is the primary fiber of the interosseous membrane in the forearm?

  • The oblique cord
  • The distal oblique fibers
  • The central band (correct)
  • The proximal forearm fibers
  • What is the function of the oblique cord in the forearm?

  • To limit distal migration of the radius relative to the ulna (correct)
  • To add stability to the distal radio-ulnar joint
  • To connect the radius and ulna together
  • To provide flexibility to the forearm
  • What percentage of interosseous membranes have distal oblique fibers?

  • 10%
  • 20%
  • 30%
  • 40% (correct)
  • Where are the distal oblique fibers located in the forearm?

    <p>Directly deep to the pronator quadratus muscle</p> Signup and view all the answers

    What is the main function of the interosseous membrane in the forearm?

    <p>To connect the radius and ulna together</p> Signup and view all the answers

    What is the thickness of the central band in the interosseous membrane compared to other fibers?

    <p>Twice as thick</p> Signup and view all the answers

    What are the two smaller components of the interosseous membrane?

    <p>The proximal forearm fibers and the distal oblique fibers</p> Signup and view all the answers

    What is the direction of the distal oblique fibers in the forearm?

    <p>Distal-laterally from the ulnar shaft to the radius</p> Signup and view all the answers

    What is the significance of the distal oblique fibers in the forearm?

    <p>To add stability to the distal radio-ulnar joint</p> Signup and view all the answers

    What is the functional significance of the interosseous membrane in the forearm?

    <p>To provide stability and function to the forearm</p> Signup and view all the answers

    What is the shape of the flow of the distal oblique fibers in the forearm?

    <p>Curved</p> Signup and view all the answers

    Study Notes

    • The interosseous membrane binds the radius and ulna together in the forearm.
    • The central band is the prominent fiber of the interosseous membrane.
    • The central band is nearly twice as thick as other fibers and has a high tensile strength.
    • Two smaller components of the interosseous membrane are described, including the oblique cord at the proximal forearm and the distal oblique fibers at the extreme distal aspect of the forearm.
    • The functional significance of the oblique cord is in question, but it may help limit distal migration of the radius relative to the ulna.
    • The distal oblique fibers are present in about 40% of membranes and add to the stability of the distal radio-ulnar joint.
    • The distal oblique fibers flow in an irregular fashion, but are generally directed distal-laterally from the distal one-sixth of the ulnar shaft to the extreme distal radius.
    • The distal oblique fibers are located directly deep to the pronator quadratus muscle.
    • The interosseous membrane has been studied extensively in cadavers.
    • The interosseous membrane is an important structure for the stability and function of the forearm.

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    Description

    "Test Your Knowledge on the Interosseous Membrane in the Forearm: Discover the anatomy and function of this vital structure that binds the radius and ulna together. From the central band to the distal oblique fibers, explore the components and functional significance of the interosseous membrane. Challenge yourself with questions on its anatomical features and role in forearm stability. Take the quiz now and become an expert on this essential part of the human body!"

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