Exam 1: Pecotal Region and the Female Breast

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Exam 1: Pecotal Region and the Female Breast
2012-06-11 15:30:17
anatomy pectoral region breast

Review of lecture 6/6 on pectoral region and the female breasts for exam 1
Show Answers:

  1. On males, what forms the contour of pectoral region?
    pectoralis major muscle
  2. On males where is the nipple usually located?
    in 4th intercostal space along mid-clavicular line
  3. On females, what forms the contour of pectoral region?
  4. On females, where is the nipple usually located?
    indefinite location after puberty
  5. What is the platysma?
    a skeletal muscle of facial expression
  6. What are two cutaneous nerves in the pectoral region?
    • supraclavicular nn
    • intercostal nn
  7. The supraclavicular nerves are from what spinal nerves?
  8. The supraclavicular nerves arise from:
    cervical plexus
  9. What do the supraclavicular nerves innervate?
    skin of 1st and 2nd intercostal spaces (upper pectoral region)
  10. The intercostal nerves are from what spinal nerves?
  11. What do the intercostal nerves innervate?
    skin associated with respective intercostal spaces (located between ribs and send cutaneous branches to skin)
  12. What are the female breasts located between?
    skin and fascia of pectoralis major muscle
  13. What is the vertical location of the female breasts?
    from ribs 2-6
  14. What is the horizontal location of the female breasts?
    from sternum to mid-axillary line
  15. The female breast is contained completely within...
    superficial fascia
  16. Where is the mid-axillary line?
    if you draw line between ant/post axillary fold
  17. Does any breast tissue go into the axilla?
  18. What is contained within the nipple?
    15-20 opennings for lactiferous ducts
  19. What do lactiferous ducts do?
    drains milk from one mammary gland
  20. What is the areola?
    area of pigmented skin surrounding nipple
  21. Composition of breast:
    • mammary glands (15-20)
    • fatty connective tissue
    • suspensory ligaments and septa forming lobules
  22. What are suspensory ligaments?
    condensations of fascia separating breast into lobules
  23. What arteries supply the breast?
    • lateral thoracic
    • intercostal (deep)
    • internal thoracic (perforating branches in intercostal spaces 3-6)
  24. What veins supply the breast?
    internal thoracic and axillary
  25. Where is the lateral thoracic A?
    on lateral surface of thorax
  26. Where is internal thoracic artery?
    along sternum in rib cage
  27. What is another name for internal thoracic artery?
    mammary artery
  28. Where do most lymph vessels of the breast converge?
    subareolar lymph plexus
  29. Where are the subareolar lymph plexus located?
    beneath skin on areola
  30. 75% of lymph from the breast goes to:
    pectoral nodes
  31. Pectoral nodes drain into:
    axillary nodes
  32. 25% of lymph from breast goes to:
    infraclavicular, parasternal, contralateral, and abdominal nodes
  33. What are parasternal nodes on one side connected to?
    contralateral nodes
  34. What connects parasternal nodes to contralateral nodes?
    lymphatic vessels
  35. Where do lymphatic vessels cross?
    the anterior mid-line
  36. How does breast cancer commonly spread?
    via lymphatic vessels
  37. What bony landmark is found in the deltopectoral triangle?
    coracoid process of scapula