fifth kinematic principle of abduction - N
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Questions and Answers

What is the fifth kinematic principle of abduction?

  • The clavicle rotates anteriorly around its own long axis
  • The clavicle rotates laterally around its own long axis
  • The clavicle rotates medially around its own long axis
  • The clavicle rotates posteriorly around its own long axis (correct)
  • Which joint motion is described as one of the primary SC joint motions?

  • Anterior rotation
  • Lateral rotation
  • Medial rotation
  • Posterior rotation (correct)
  • How many degrees of posterior clavicular rotation during abduction have been reported in studies?

  • 10-15 degrees
  • 20-35 degrees (correct)
  • 40-55 degrees
  • 60-75 degrees
  • Which in vivo study shows that posterior rotation at the SC joint is the most predominant motion of the clavicle during scapular plane abduction?

    <p>Study on healthy shoulders</p> Signup and view all the answers

    At which ranges of shoulder abduction does most of the rotation occur?

    <p>Middle and late ranges</p> Signup and view all the answers

    What did the in vivo study on subjects diagnosed with subacromial impingement syndrome show regarding posterior rotation of the clavicle throughout abduction in the scapular plane?

    <p>Reduced posterior rotation</p> Signup and view all the answers

    What is the most predominant motion of the clavicle during scapular plane abduction?

    <p>Posterior rotation</p> Signup and view all the answers

    What is the SC joint?

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

    What is subacromial impingement syndrome?

    <p>A condition where the clavicle experiences reduced posterior rotation throughout abduction in the scapular plane</p> Signup and view all the answers

    Which range of shoulder abduction is affected in subacromial impingement syndrome?

    <p>All ranges equally</p> Signup and view all the answers

    Which type of motion is predominant during scapular plane abduction?

    <p>Posterior rotation</p> Signup and view all the answers

    What type of sensors were used in the in vivo studies mentioned in the text?

    <p>Motion sensors implanted into the bones</p> Signup and view all the answers

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