Test Your Knowledge on the Anatomy and Function of Elbow Flexors and the Interos...
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Questions and Answers

What is the role of the interosseous membrane in relation to the humeroradial joint?

  • It helps protect the humeroradial joint from large compression forces. (correct)
  • It assists with holding the radius and load firmly against the humerus.
  • It directs the weight proximally through the radius.
  • It causes bony asymmetry and high stress on the humeroradial joint and wrist.

    • What happens when there are tears in the interosseous membrane?

  • The humerus migrates distally.
  • The radius migrates proximally. (correct)
  • The wrist becomes unstable
  • The elbow becomes hyperextended

    • What is the predominant fiber direction of the central band of the interosseous membrane?

  • Aligned to resist distally applied forces on the radius.
  • Aligned to resist proximally applied forces on the radius. (correct)
  • Aligned to resist laterally applied forces on the radius.
  • Aligned to resist medially applied forces on the radius.

    • What happens when heavy loads are held with the elbow extended?

    <p>The radius migrates proximally.</p> Signup and view all the answers

    Which muscle can assist with holding the radius and load firmly against the humerus?

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

    What can proximal migration of the radius cause?

    <p>Bony asymmetry and high stress on the humeroradial joint and wrist.</p> Signup and view all the answers

    What is the global kinesiologic role of the central band of the interosseous membrane?

    <p>To resist distally applied forces on the radius.</p> Signup and view all the answers

    Which bone does most elbow flexors attach to?

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

    What does contraction of the elbow flexors do?

    <p>Pulls the radius proximally against the humerus.</p> Signup and view all the answers

    What can happen if the interosseous membrane tears?

    <p>The radius migrates distally.</p> Signup and view all the answers

    What happens when heavy loads are supported through the forearm at shoulder level?

    <p>The weight is directed proximally through the radius.</p> Signup and view all the answers

    Study Notes

    • Most elbow flexors attach to the radius.
    • Contraction of these muscles pulls the radius proximally against the humerus.
    • The interosseous membrane helps protect the humeroradial joint from large compression forces.
    • Tears in the interosseous membrane can cause proximal migration of the radius.
    • Proximal migration can cause bony asymmetry and high stress on the humeroradial joint and wrist.
    • The central band of the interosseous membrane has an important global kinesiologic role.
    • The predominant fiber direction of the central band is not aligned to resist distally applied forces on the radius.
    • Holding heavy loads with the elbow extended places demands on other tissues to accept the load.
    • Contraction of the brachioradialis or other muscles can assist with holding the radius and load firmly against the humerus.
    • Supporting loads through the forearm at shoulder level directs the weight proximally through the radius.

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    Description

    Test your knowledge on the anatomy and function of the elbow flexors and the interosseous membrane with this quiz. Learn about the important role these muscles play in protecting the humeroradial joint and wrist, and the potential consequences of interosseous membrane tears. Discover how to properly support heavy loads through the forearm and which muscles can assist with holding the radius and load firmly against the humerus. Keywords: anatomy, elbow flexors, interosseous membrane, humeror

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