Osteology/Arthrology/Embryology of the Anterior Thorax Flashcards
What vertebral levels correspond to the position of the manubrium sterni?
T3-T4
Which ribs will articulate with the manubrium sterni?
the first and second ribs
What vertebral levels correspond to the position of the corpus sterni?
T5-T9
How many sternebrae form the corpus sterni?
4 sternebrae
What ribs will joint with the corpus sterni via costal cartilage?
ribs 2 - 7
What feature of the corpus sterni is present in 4-7% of the population?
a sternal foramen
Which ribs are classified as typical ribs, true ribs, costa verae, and vertebrosternal ribs in the typical adult skeleton?
ribs 3 - 7
Which ribs are classified as atypical ribs, true ribs, costa verae, and vertebrosternal ribs in the typical adult skeleton?
ribs 1 and 2
Which ribs are classified as typical ribs, false ribs, costa spuriae, and vertebrochondral ribs in the typical adult skeleton?
ribs 8 and 9
Which ribs are classified as atypical ribs, false ribs, costa spuriae, and vertebrochondral ribs in the typical adult skeleton?
rib 10
Which ribs are classified as atypical ribs, false ribs, costa spuriae, and vertebral ribs in the typical adult skeleton?
ribs 11 and 12
What joint classification is now given to the joint between the sternum, clavicle, and first rib?
synovial saddle (diarthrosis sellar) joint
What ribs will participate in the sternocostal or sternochondral joint?
rib 1 to rib 7
What is the classic classification of the first sternocostal or sternochondral joint?
cartilaginous (amphiarthrosis) synchondrosis
What is the newer suggested classification of the first sternocostal or sternochondral joint?
cartilaginous (amphiarthrosis) symphysis
What is the classification of the second - seventh sternocostal or sternochondral joint?
synovial plane (diarthrosis arthrodia)
What is the classification of the sixth through the ninth interchondral joints?
synovial plane (diarthrosis arthrodia)
What is the classification of the fifth - sixth or ninth - tenth interchondral joint?
fibrous (amphiarthrosis) syndesmosis
Which costal cartilages fail to form a joint at their sternal end?
the eleventh and twelfth costal cartilages
How many primary centers of ossification appear in the manubrium?
1 - 3 centers have been identified
How many primary centers of ossification appeat in the corpus sterni?
typically 6
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
In what part of the rib will primary centers of ossification appear?
the body (corpus, shaft)
In what parts of the rib will secondary centers of ossification appear?
the head, articular surface of the tubercle, and the non-articular surface of the tubercle
Which ribs will demonstrate primary centers of ossification for the body (corpus or shaft)?
all ribs; ribs 1 - 12
Which ribs will demonstrate secondary centers of ossification?
ribs 1 - 10
Which ribs lack secondary centers of ossification?
ribs 11 and 12
