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The Thoracic Wall
Bones of Thorax and organization of musculature, blood supply, and innervation
Question | Answer |
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Describe the major lines of orientation of the Thorax (2) | 1) Mid-clavicular line: imaginary line running vertically from the midpoint of the clavicle 2) Mid-axillary line: imaginary line running vertically downward from the mid-axilla |
List the three bones of the Sternum | Manubrium, body, xiphoid process |
At what thoracic vertebrae level does the manubrium lie? | level of the 3rd and 4th thoracic vertebrae |
What is the name of the upper border of the manubrium? | Jugular (suprasternal) notch |
What bones does the manubrium articulate with? | Clavicles, the first and upper part of the 2nd rib, the body of the sternum, and the 2nd rib. |
What is the articulation between the manubrium and the sternal body called? | Manubriosternal joint or the sternal angle of Louis |
What are the thoracic vertebral levels of the body of the sternum? | 5 through 9 |
What ribs articulate with the body of the sternum? | 2 through 7 |
What special landmark joint does the anterior part of rib 7 articulate with? | xiphosternal joint |
What vertebral level does the Xiphoid lie in? | 10th thoracic vertebrae |
What # ribs are the true ribs? | Upper 7 (1-7) |
What cartilage attaches true ribs to the sternum? | Coastal cartilages |
Which # ribs are false ribs? | Ribs 8-12 |
What are ribs 8,9,10 called? What distinguishes them from the other ribs? | Vertebrochondral ribs (attach to each other and to rib 7 via coastal cartilages)--connect to sternum indirectly |
Which are the free/floating ribs? Why are they called that? | Ribs 11 and 12; they do not have any anterior attachaments |
What ribs are the typical ribs? | Ribs 3-9 |
Name the 5 major anatomical parts of the typical ribs? | Head, tubercle, neck, coastal groove, angle |
How many facets in the head articulate with the vertebral body? | Two facets |
Which thoracic vertebrae does rib 7 articulate with? 8th? Nth? | 7 and 6th; 8th and 7th; N and N-1 |
What vertebral process does the tubercle articulate with? | The transverse process |
Where is the neck of a rib located? | Between the head and the tubercle |
What three structures are located in the coastal groove? (superior to inferior) | Intercostal vein Intercostal artery Intercostal nerve |