Exam 1: Forearm (antebrachium)

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brau2308
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158370
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Exam 1: Forearm (antebrachium)
Updated:
2012-06-12 15:28:54
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anatomy antebrachium forearm muscles
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review of 6/12 lecture on forearm for exam 1
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  1. What are the cutaneous nerves that supply the forearm?
    • lateral antebrachial cutaneous
    • medial antebrachial cutaneous and posterior antebrachial cutaneous
  2. What is the lateral antebrachial cutaneous n. a continuation of?
    musculocutaneous n.
  3. What does the lateral antebrachial cutaneous n. supply?
    anterior and posterior aspects of radial (lateral) side of forearm to the wrist
  4. What is the medial antebrachial cutaneous a branch of?
    medial cord of brachial plexus
  5. What does the medial antebrachial cutaneous n. supply?
    anterior and posterior aspects of ulnar (medial) side of forearm
  6. What is the posterior antebrachial cutaneous n. a brach of?
    radial n.
  7. What does the posterior antebrachial cutaneous n. supply?
    posterior surface of forearm between distributions of the lateral and medial antebrachial cutaneous nn.
  8. Is the superficial fascia of the forearm continuous with that of the arm and hand?
    yes
  9. What is the cylindrical sheath that encloses both flexor and extensor mm of the forearm?
    antebrachial (deep) fascia
  10. What is the antebrachial fascia fused to?
    medial border of ulna
  11. What is the septum that the antebrachial fascia sends from the ulna to the radius?
    interosseous membrane
  12. Why does the interosseous membrane have holes at its distal end?
    foor vessels to pass through (ant/post interossei mm.)
  13. What does the interosseous membrane form?
    anterior and posterior muscular compartments
  14. In the distal anterior compartment, this fascia splits into two layers:
    • one anterior to three muscles
    • one between these muscles and the other more deeply located flexor muscles
  15. What is the flexor retinaculum?
    at the wrist, stout transverse fibers that span the carpal groove
  16. Where is the flexor retinaculum?
    at the wrist between the pisiform bone and hamulus of the hamate on the ulnar side, and the scaphoid and trapezium on the radial side
  17. What does the flexor retinaculum form?
    roof of carpal tunnel
  18. Which structures pass anterior to the flexor retinaculum?
    • palmaris longus tendon
    • ulnar n.
    • ulnar a.
  19. The ulnar n. and a. pass anterior to the flexor retinaculum but are covered by a fibrous structure called:
    ulnar tunnel (canal) or Guyon's canal
  20. What passes posterior to the flexor retinaculum?
    9 tendons of long flexors of thumb and fingers and the median nerve
  21. What are the superficial flexor muscles of the forearm?
    • pronator teres
    • flexor carpi radialis
    • palmaris longus
    • flexor carpi ulnaris
  22. The palmaris longus m. is absent in what percentage of people?
    7%
  23. What is ulnar abduction (deviation)?
    moving hand toward pinky (ulna)
  24. What is radial abduction (deviation)?
    moves hand toward thumb (radius)
  25. What are the intermediate flexor muscles of the forearm?
    flexor digitorum superficialis
  26. What are the deep flexor muscles of the forearm?
    • flexor pollicis longus
    • flexor digitorum profundus
    • pronator quadratus
  27. What is a vicula?
    carries blood to tendons of muscles
  28. What are the arteries supplying the flexor muscles?
    • radial a.
    • ulnar a.
  29. The radial recurrent a. supplys:
    the elbow region
  30. The muscular branches of the radial a. supply:
    flexor mm.
  31. The ulnar recurrent a. supplys:
    elbow region
  32. The common interosseous a. is a branch of what artery?
    ulnar a.
  33. What are the branches of the common interosseous artery?
    anterior and posterior interosseous aa.
  34. What does the anterior interosseous a. supply?
    bulk of flexor mm.
  35. What are the superficial extensor muscles of the forearm?
    • brachioradialis
    • extensor carpi radialis longus
    • extensor carpi radialis brevis
    • extensor digitorum
    • extensor digiti minimi
    • extensor carpi ulnaris
  36. Which muscles are required for radial abduction?
    • extensor carpi radialis brevis
    • extensor carpi radialis longus
    • flexor carpi radialis
  37. Which muscles are involved in ulnar abduction?
    • extensor carpi ulnaris
    • flexor carpi ulnaris
  38. What are the deep extensor muscles of the forearm?
    • supinator
    • abductor pollicis longus
    • extensor pollicis brevis
    • extensor pollicis longus
    • extensor indicis
  39. What arteries supply the extensor muscles of the forearm?
    • posterior interosseous a.
    • posterior interosseous recurrent branch
    • radial recurrent a.
  40. Where does the posterior interosseous a. branch from?
    common interosseous a.
  41. What does the radial recurrent a. supply?
    brachioradialis and radial carpal extensors
  42. What does the radial recurrent a. anastomoses with?
    radial collateral branch of profunda brachii a.
  43. Which artery pierces the distal part of the interosseous membrane?
    terminal (posterior) branch of the anterior interosseous a.
  44. Why does the terminal (posterior) branch of the anterior interosseous a. pierce the distal part of the interosseous membrane?
    to supply muscles in the distal part of the extensor compartment

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