A&P Lab 3

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  1. The only place that the bones of the arm join the rest of the body is......
    sternoclavicular joint
  2. The most important stabilizer of the shoulder girdle is......
    coracoclavicular ligament
  3. List the four muscles of the rotator cuff and their actions
    • Supraspinatus- abduction 
    • Infraspinatus- lateral rotation 
    • teres minor- lateral rotation 
    • subscapularis- medial rotation
  4. Abduction of the arm requires what two muscles?
    • Deltoid
    • supraspinatus
  5. What are the two extensors of the shoulder?
    • teres major 
    • latissimus dorsi
  6. The glenoid process is a very shallow cup for the head of the humerus. What is the advantage of this?
    increased range of motion
  7. What is the disadvantage?
    easy to dislocate
  8. Most shoulder dislocation occur in which direction?
  9. The structure that provides the most security for the glenohumeral joint is .....
    the tendon of the long head of the biceps
  10. What nerve may be damaged in anterior shoulder dislocations?
  11. What muscles does this nerve supply?
  12. Why do we need muscles that fixate the scapula?
    because it is not fixed itself
  13. When is it important to fixate the scapula?
    for forceful movements of the arm
  14. Only two skeletal muscles below the neck are supplied by a cranial nerve. What are they and what is the nerve?
    • Trapezius- sternocleidomastoid
    • Accessory nerve- cranial nerve
  15. The pectoralis major flexes, adducts and medially rotates the arm. What exercise strengthens this muscles?
  16. The tendon of the long head of the biceps fortuitously passes across the lateral head of the humerus holding it in place. Where does the short head of the biceps originate?
    coracoid process
  17. Where does the biceps insert?
    radial tuberosity
  18. The insertion of the biceps tendon allows it to flex the elbow joint. What other motion does it allow?
    supination of the forearm
  19. The most powerful flexor of the forearm is.....
  20. Where does it insert?
    ulnar tuberosity
  21. What nerve supplies both brachialis and biceps?
    musculocutaneous nerve
  22. The triceps brachii originates at the shoulder and back of the humerus. Where does it insert?
    Olecranon process of ulna
  23. The insertion allows what action?
    extension of the elbow
  24. The ulna is on which side of the elbow joint?
  25. What is the range of motion of the ulna?
    • flexion 
    • extension
  26. The radius has what additional range of motion?
    • supination
    • pronation
  27. The muscles in the anterior compartment of the forearm _______ the wrist and fingers.
  28. Most of the muscles on the posterior forearm that extend the wrist and fingers originate in a common tendon that is attached to the _______
    lateral epicondyle of the humerus
  29. Moving from radial to ulnar (lateral to medial), what are the bones of proximal row of carpals?
    • scaphoid
    • lunate
    • tripquetrum 
    • pisiform
  30. What bones are in the distal row?
    • trapezium 
    • trapezoideum 
    • capitate
    • hamate
  31. The flexor tendons for the fingers and the median nerve pass into the hand through the ________.
    carpal tunnel
  32. The muscles that allow you to pinch the _______.
  33. How do you test for the intact motor function of the ulnar, median and radial nerves?
    • ulnar - adduct and abduct the fingers
    • median - opposition of the thumb
    • radial - extension of the fingers
  34. How do you test for intact sensory function of the ulnar, median and radial nerves?
    • ulnar - 5th finger 
    • median - palm 
    • radial - back of hand
Card Set
A&P Lab 3
Lab Test 1 Study guide
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