Flashcards in Sternum Deck (10)
What is the name given to the segments of the sternum?
sternabrae (for sternal bodies)
How many primary centers of ossification appear in the manubrium?
How many primary centers of ossification appear in the corpus sterni?
What are the locations of the primary centers of ossification in the corpus sterni?
one in each of the first two sternabrae and bilateral centers in the last two sternabrae
Primary centers of ossification for the sternum first appear at what age?
fifth fetal month
In what part of the sternum will a secondary center of ossification appear?
the xiphoid process
When does the xiphoid process first demonstrate a center of ossification?
sometime during or after 3 years old
When will the synchondroses between sternabrae begin to ossify?
Synchondroses of the corpus sterni will fuse together beginning with which sternabrae?
- the lower sternabrae fuse first
- they ossify in a caudal to cranial direction