Flashcards in Thoracic Cage Deck (47):
What makes up the thoracic cage?
What is the gap at the top or bottom of the thoracic cage called?
What is the part that joins false ribs?
Costal Margin/Costal Arch
What is the anterior border of the superior thoracic aperture
What is the posterior border of the the superior thoracic aperture
Body of T1
What is the lateral border of the superior thoracic aperture
Medial margin of rib 1 on each side
What is the posterior border of the inferior thoracic aperture
Body of T12
What is the posteriolateral border of the inferior thoracic aperture?
Distal end of rib 11
What is the anterolateral border of the inferior thoracic aperture?
What is the anterior border of the inferior thoracic aperture
What makes up the thoracic wall
What is the position of the superior margin of manibrium
Level of intervertebral disk between T2 and T3
What does the facet of the manibrium articulate with?
The costal cartilage of the first rib
What does the demifacet of the manibrium articulate with?
Part of the costal cartilage of the 2nd rib
What shape is the manibrium?
What is the position of the sternal angle in relation to other structures
-2nd costal cartilage
What ribs do the articular facets of the body of the sternum accomodate (exclude the demifacets)
3rd to 6th ribs
What ribs do the demifacets of the the body of the sternum accomodate?
What is the position of the Xiphoid Process in relation to other structures
Level of T10 vertebra
What does the Xiphoid process articulate with?
Sometimes articulates with a part of the costal cartilage of the 7th rib
What are the true ribs?
What are the false ribs
What are the floating ribs
11 and 12
What makes the 1st rib atypical
it is shorter and wider
There are no thoracic vertebrae above. Therefore, only one articular facet on its head
Two grooves on superior surface for subclavian vessels
What makes the 2nd rib atypical?
Roughened area on upper surface for serratus anterior muscle attachment
What makes the 10th rib atypical
Only one facet (for articulation with numerically corresponding vertebra)
What makes the 11th and 12 ribs atypical?
They have no neck
There is only one facet (for articulation with numerically articulating vertebra)
What distinguishes the thoracic vertebrae from other vertebrae
Vertebral body is heart shaped
Demifacets on sides on each side of vertebral body (articulates with rib heads)
Costal facets on transverse processes of ribs (articulates with rib tubercles) -- only on T1-T10
Spinous processes: Long and slant inferiorly
What makes T1 an aypical vertebra?
It's superior facet is not a demifacet
Only vertebra to articulate with the 1`st rib
What makes T10 an aypical vertebra?
Single pair of whole facets. Are both located across the vertebral body and pedicle
Articulates with 10th rib only
What makes T11 and T12 atypical?
Single pair of entire costal facets --- located on pedicle
Which direction do the fibres of the External Intercostal muscles face?
What is the function of the External intercostal muscles
Muscle tone holds ribs in place
What direction do the fibres of the Internal intercostal muscles face?
What is the function of the internal intercostal muscles
Muscles tone keeps ribs in place
Which muscle of the thoracic wall is in the neurovascular plane?
Internal intercostal muscles
What is the function of the Innermost Intercostal Muscle group?
Where are the innermost intercostal muscles (subgroup of the intercostal muscle group) located
On the lateral side of the intercostal space
Where are the subcostal muscles (subgroup of intercostal group) located
On the poserior side of the intercostal space
Where are the Transversus muscles (subgroup of the intercostal muscle group) located
On the anterior side of the intercostal space
What intercostal vessels branch off the descending thoracic aorta
Posterior intercostal artery
What intercostal vessels branch off the internal throacic artery and vein
Anterior Intercostal artery and vein
Anterior perforating branches of intercostal artery and vein
What do the collateral branches of intercostal vessels connect?
Posterior intercostal artery and veind
Anterior intercostal artery and vein
Where do the Anterior Intercostal Veins drain into
Internal thoracic Vein
Where do the Posterior Intercostal Veins drain into
Right --- Azygous Vein
Left --- Hemiazyhous and Accessory Hemiazygous
EXCEPT FOR THAT OF THE 1ST INTERCOSTAL SPACE
Where do the Posterior Intercostal Veins of the 1st intercostal space drain into?
Vertebral Vein or Brachiocepalic Vein of the same side