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Questions and Answers

What is the primary function of the interosseous membrane?

  • To attach the radius to the ulna
  • To provide a mechanism for transmitting force proximally through the upper limb (correct)
  • To serve as an attachment site for intrinsic muscles of the hand
  • To prevent radial fractures

    • What is the primary function of the interosseous membrane in the forearm?

  • To attach the radius to the ulna
  • To provide a mechanism for transmitting force proximally through the upper limb (correct)
  • To serve as an attachment site for intrinsic muscles of the hand
  • To allow for greater mobility in the wrist joint

    • What is the primary role of the interosseous membrane?

  • To provide attachment sites for intrinsic muscles of the hand
  • To transmit force distally through the upper limb
  • To transmit force proximally through the upper limb (correct)
  • To provide stability to the radiocarpal joint

    • What percentage of compression force is directed through the radiocarpal joint?

    <p>80%</p> Signup and view all the answers

    What percentage of compression force is directed through the radiocarpal joint?

    <p>80%</p> Signup and view all the answers

    Which of the following is NOT a function of the interosseous membrane?

    <p>To prevent ulnar fractures</p> Signup and view all the answers

    What percentage of compression force is directed through the radiocarpal joint?

    <p>80%</p> Signup and view all the answers

    Which muscle contracts to assist with holding the radius and load firmly against the capitulum?

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

    Which muscle contracts to assist with holding the radius and load firmly against the capitulum?

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

    What is the name of the fibers that bind the radius firmly to the ulna?

    <p>Central band fibers</p> Signup and view all the answers

    What happens when there is a distal pull of the radius on the interosseous membrane?

    <p>The membrane slackens</p> Signup and view all the answers

    What is the central band of the interosseous membrane responsible for?

    <p>Binding the radius firmly to the ulna</p> Signup and view all the answers

    Which ligament experiences larger demands on other tissues when there is a distal pull of the radius?

    <p>Oblique cord</p> Signup and view all the answers

    What happens when there is a distal pull of the radius?

    <p>The central band of the interosseous membrane slackens</p> Signup and view all the answers

    What muscle contracts to assist with holding the radius and load firmly against the capitulum?

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

    Which joint experiences the most compressive force transmitted through the interosseous membrane?

    <p>Radiocarpal joint</p> Signup and view all the answers

    What is the central band of the interosseous membrane responsible for?

    <p>Transmitting force proximally through the upper limb</p> Signup and view all the answers

    What happens when the distal pull of the radius slackens the interosseous membrane?

    <p>The membrane becomes slack</p> Signup and view all the answers

    What is the function of the extrinsic muscles of the hand that attach to the interosseous membrane?

    <p>To move the fingers</p> Signup and view all the answers

    What is the function of the interosseous membrane in relation to the ulna?

    <p>It transfers part of the proximal directed force through the radius to the ulna</p> Signup and view all the answers

    What can happen as a result of the interosseous membrane transferring force from the radius to the ulna?

    <p>Increased likelihood of radial fracture</p> Signup and view all the answers

    Which muscle experiences a deep ache when fatigued due to its role in holding the radius and load firmly against the capitulum?

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

    Which type of muscle is attached to the interosseous membrane?

    <p>Extrinsic muscles of the forearm</p> Signup and view all the answers

    Which bone is firmly bound to the ulna by the central band fibers?

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

    Which ligament is responsible for stabilizing the radius during pronation and supination?

    <p>Annular ligament</p> Signup and view all the answers

    What is the significance of the fiber direction of the central band in the interosseous membrane?

    <p>It allows for equal distribution of compressive forces across the elbow</p> Signup and view all the answers

    What is the oblique cord?

    <p>A ligament that connects the radius to the ulna</p> Signup and view all the answers

    Which tissue experiences larger demands when the distal pull of the radius slackens the interosseous membrane?

    <p>Oblique cord</p> Signup and view all the answers

    What is the annular ligament?

    <p>A ligament that encircles the head of the radius</p> Signup and view all the answers

    What can cause a deep ache in the brachioradialis muscle?

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

    What is the primary function of the extrinsic muscles of the hand that attach to the interosseous membrane?

    <p>To assist with finger extension and flexion</p> Signup and view all the answers

    What is the name of the joint where 80% of compression force is directed through?

    <p>Radiocarpal joint</p> Signup and view all the answers

    Which joint experiences the majority of the compressive forces transmitted through the upper limb?

    <p>Wrist joint</p> Signup and view all the answers

    What is the result of the interosseous membrane transferring force from the radius to the ulna?

    <p>Increased likelihood of radial fracture</p> Signup and view all the answers

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