BMS Anatomy Lecture 6: Brachial Plexus and Shoulder Girdle Muscles
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Questions and Answers

Which part of the brachial plexus is responsible for providing innervation to the Musculocutaneous nerve?

  • Posterior cord
  • Superior trunk
  • Medial cord
  • Lateral cord (correct)

    • How many divisions does the brachial plexus have?

  • 4 divisions
  • 3 divisions (correct)
  • 5 divisions
  • 2 divisions

    • Which nerve is primarily innervated by the Ulnar nerve?

  • Ulnar nerve (correct)
  • Radial nerve
  • Median nerve
  • Musculocutaneous nerve

    • The Axillary nerve is a branch of which cord in the brachial plexus?

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

    Which trunk of the brachial plexus gives rise to the Posterior cord?

    <p>Posterior inferior trunk</p> Signup and view all the answers

    Which of the following statements about the roots of the brachial plexus is correct?

    <p>The roots pass through scalene muscles and head towards the axilla.</p> Signup and view all the answers

    What is the significance of the trunks in the brachial plexus?

    <p>The trunks give rise to anterior and posterior divisions.</p> Signup and view all the answers

    How do the divisions of the brachial plexus pass underneath the clavicle?

    <p>As they head towards the axilla.</p> Signup and view all the answers

    What characterizes the cords of the brachial plexus?

    <p>Each cord is formed from both anterior and posterior divisions.</p> Signup and view all the answers

    Which statement accurately describes the anterior divisions of the brachial plexus?

    <p>Each trunk gives off one anterior division.</p> Signup and view all the answers

    What is the primary action of the middle fibers of the trapezius muscle?

    <p>Retraction (adduction) of scapula</p> Signup and view all the answers

    Which nerve innervates the Rhomboids major muscle?

    <p>Dorsal scapular nerve</p> Signup and view all the answers

    What is the origin of the Levator Scapulae muscle?

    <p>Transverse processes of C1-C4</p> Signup and view all the answers

    Which muscle is responsible for the protraction of the scapula?

    <p>Pectoralis minor</p> Signup and view all the answers

    What is the insertion point of the Rhomboids minor muscle?

    <p>Medial border of scapula at the root of the spine</p> Signup and view all the answers

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