S3 Osteology of the Anterior Thorax Flashcards
What vertebral levels correspond to the position of the corpus sterni?
T5-T9
How many sternabrae for the corpus sterni?
4 sternabrae
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 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
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 is the classification of the 1st sternocostal or sternochondral joint?
cartilaginous (amphiarthrosis) synchondrosis
What is the classification of the 2nd-7th sternocostal or sternochondral joint?
synovial plane (diarthrosis arthrodia)
Which of the sternocostal or sternochondral ligaments is unique to the 2nd sternocostal or sternochondral joint?
intra-articular ligament
What is the classification of the 6th through the 9th interchondral joints?
synovial plane (diarthrosis arthrodia)
What is the classification of the 5th-6th or 9th-10th interchondral joint?
fibrous (amphiarthrosis) syndesmosis
Which costal cartilages fail to form a joint at their sternal end?
11th and 12th costal cartilages
What separates the manubrium sterni and corpus sterni?
manubriosternal symphysis
What attaches to the scalene tubercle of the 1st rib?
anterior scalene muscle
Which groove on the body (corpus or shaft) of the 1st rib is close to the vertebral end?
the groove for the subclavian artery and the 1st thoracic nerve
Which groove on the body ( corpus or shaft) of the 1st rib is close to the sternal end?
groove for the subclavian vein
What specifically will attach to the crest of the neck of the 2nd rib?
superior costotransverse ligament from the transverse process of T1
What specifically attaches to the back of the neck of the 2nd rib?
inferior costotransverse ligament from the transverse process of T2
What unique feature is present on the body (corpus or shaft) of the 2nd rib?
tuberosity for the serratus anterior
Which ribs are classified as typical ribs, true ribs, costa verae, and vertebrosternal ribs in the typical adult skeleton?
ribs 3-7
