Sternum: Morphology Flashcards
What parts form the adult sternum?
- manubrium sterni
- corpus sterni
- xiphoid process
What vertebral levels correspond to the position of the manubrium sterni?
T3-T4
What feature is present at the top of the manubrium sterni?
jugular notch (suprasternal notch)
What is the name given to the articular site at the superolateral margin of the manubrium sterni?
clavicular notch
What are the participants in the sternoclavicular joint?
- clavicle
- manubrium sterni
- costal cartilage of the first rib
Which ribs will articulate with the manubrium sterni?
1st and 2nd ribs
What names are given to the articular sites for the joint with the first and second ribs?
- costal notch I for the first rib costal cartilage
- costal notch II for the second rib costal cartilage
What separates the manubrium sterni and corpus sterni?
the manubriosternal symphysis
What joint classification is identified between the manubrium sterni and the corpus sterni?
cartilaginous (amphiarthrosis) symphysis
What vertebral levels correspond to the position of the corpus sterni?
T5-T9
How many sternabrae for the corpus sterni?
4
What surface feature on the corpus sterni identifies the location of the synchondroses?
transverse lines
What articular sites for the costal cartilage of ribs will be identified on the corpus sterni?
costal notches II-VII
What feature of the corpus sterni is present in 4-7% of the population?
a sternal foramen
What causes the appearance of the sternal foramen?
failure of the ossification centers of the sternum to fuse together normally
