thoracic Flashcards
what are the components of thoracic cage?
1- Sternum
2- 12 pairs of rib ( so 24 )
3- Costal cartilage ( 10 for the first 10 rib )
4- 12 thoracic vertebrae and the disks
what are the true ribs count em
1-7
why are they called true ribs?
because their costal cartilage attach to the sternum directly
what are the false ribs, count em up
8-10
why are they called false ribs?
because their costal cartilage is attached to the costal cartilage of the rib above ( 8 will attach to 7th , 9 will attach to 8 , 10 will attach to 9 )
what are the floating ribs count em up
11-12
why are they called floating ribs
because they dont attach to the costal cartilage –> floatinggg not connected anteriorly
what other classification of ribs?
typical
atypical
what are the typical ribs
3-9
what are the characteristics of typical ribs ( what makes them typical) on the posterior END.
1- 2 faucets on the head
2- tubercle on the neck with a faucet
3- Twisted shaft ( twisted shaft means eno the anterior and posterior end should not be on the same level )
whats the neck of a rib?
extension between the tubercle , the head.
what ligament attaches to the neck
costotransverse ligament , smooth articular faucet
whats the ligament that attaches to the transverse process
lateral costotransverse ligament, rough for non articular surface
what does the head of a TYPICAL rib articulate with? ( typical 2 faucets )
the corresponding vertebral body
the body of the vertebrae above.
Example :- 7th rib head will articulate with the 7th vertebrae and 6th vertebrae w hakaza
what does the head of the ATYPICAL rib articulate with? one faucet only on the head
the corresponding vertebrae only
10th rib will articulate 10th vertebrae only
what does the tubercle of the rib articulate with?
the transverse process of corresponding vertebrae
- 4th rib tubercle articulate with the transverse process of the 4th vertebrae
the tubercle of rib has 2 surfaces , define them and what they attach to ?
1- smooth surface this one articulates with the vertebrae transverse process
2- rough surface attaches to the ligament , lateral costo transverse
whats name of the joint between rib head and vertebrae body
Costovertebral joint
whats the name of the joint between rib tubercle and transverse process
costotransverse joint
whats the type of joint in the posterior end of the rib?
ALL are synovial plane
whats angle of the rib?
the point of maximum convexity in the body ,and its the most liable to fractures
whats costal groove?
an area below the inferior border and it protects intercostal vessels
whats are the surfaces and borders of normal rib?
normal rib has :
Upper and lower border
Inner and outer surface
what are the Atypical ribs?
1,2
10-12