Shoulder Anatomy & Biomechanics

20 Questions | Total Attempts: 1633

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Shoulder Anatomy & Biomechanics


Questions and Answers
  • 1. 
  • 2. 
  • 3. 
  • 4. 
  • 5. 
    Moving the arm away from the midline of the body is _____________.
  • 6. 
    Moving the arm toward the midline of the body is abduction.
    • A. 

      True

    • B. 

      False

  • 7. 
    Moving the arm toward this midline of the body is called ___________.
  • 8. 
    The four muscles that comprise the rotator cuff (in alphabetical order) are:
  • 9. 
    The rotator cuff is a group of ________ and _______ in the shoulder, connecting the upper arm (________) to the shoulder blade (________).
  • 10. 
    Most rotator cuff tears and inpingement happen with this muscle.
    • A. 

      Supraspinatus

    • B. 

      Infraspinatus

    • C. 

      Teres Minor

    • D. 

      Subscapularis

  • 11. 
    The role of the subscapularis muscle is prominent in the movement of the ______ and the _______ of the arm which requires _______ of the humerus head.
  • 12. 
    A rotator cuff tear is the tear of the rotator cuff tendon
    • A. 

      True

    • B. 

      False

  • 13. 
    As part of the rotator cuff, these two muscles help hold the humeral head in the glenoid cavity of the scapula. They work in tandem with the posterior deltoid to externally (laterally) rotate the humerus, as well as perform adduction, extension and transverse extension.
    • A. 

      Infraspinatus

    • B. 

      Teres Minor

    • C. 

      Supraspinatus

    • D. 

      Subscapularis

  • 14. 
    Contraction of the _________ muscle leads to abduction of the arm at the shoulder joint. 
  • 15. 
    Which one is not a function of the supraspinatus muscle?
    • A. 

      Rotates the head of the humerus medially (internal rotation)

    • B. 

      Contraction leads to abduction of the arm at the shoulder joint

    • C. 

      Helps to resist the inferior gravitational forces placed across the shoulder joint due to the downward pull from the weight of the upper limb

    • D. 

      Helps to stabilize the shoulder joint by keeping the head of the humerus firmly pressed medially against the glenoid fossa of the scapula

  • 16. 
    Which muscle is a powerful defense to the front of the shoulder-joint, preventing displacement of the head of the humerus.
    • A. 

      Infraspinatus

    • B. 

      Supraspinatus

    • C. 

      Teres Minor

    • D. 

      Subscapularis

  • 17. 
    The primary function of the _________ is extension, horizontal (transverse) extension and lateral rotation of humerus at the shoulder joint. 
  • 18. 
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