Exam 2 - Basic Osteology (Coccyx and Sternum and Ribs) Flashcards
What is the typical number of segments that unite to form the adult coccyx?
4 segments
What bony features are present on the coccyx?
all segments are represented by a vertebral body
in addition, Co1 has a coccygeal cornu and transverse process
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 names are given to the articular sites for the joint with the first and second rib?
costal notch I for the first rib costal cartilage
costal notch II for the second rib costal cartilage
How many sternabrae for the corpus sterni?
4 sternabrae
What surface feature on the corpus sterni identifies the location of the old synchondroses?
transverse lines
What articular sites for the costal cartilage of ribs will be identified on the corpus sterni?
costal notches II-VI
What feature of the corpus sterni is present in 4-7% of the population?
a sternal foramen
What are the primary parts of the vertebral end of a typical rib?
head
neck
tubercle
What features may be identified on the head of a typical rib?
two articular surfaces and the interarticular crest
what feature on the head of a rib seperates the superior and inferior articular facet?
interarticular crest
What features may be identified on the neck of a typical rib?
crest of the rib
What features may be identified on the tubercle of a typical rib?
the articular surface of the tubercle
nonarticular surface of the tubercle
Which feature of the tubercle of a typical rib is closer to the head of the rib?
the articular surface of the tubercle
What is present on the head of the first rib?
a single articular surface
What is lacking at the head of the first rib?
an interarticular crest
Is there a crest of the neck of the first rib?
not a well-developed one like on the typical rib
What is unique about the body (corpus or shaft) of the first rib?
the body of the first rib is flattened and has a scalene tubercle flanked by the groove for the subclavian artery and the groove for the subclavian vein
Which groove of the body of the first rib is close to the vertebral end?
the groove for the subclavian artery and the first thoracic nerve
Which groove on the body of the first rib is close to the sternal end?
groove for the subclavian vein
What features may be identified on the head of rib 2?
two articular surfaces and the interarticular crest
What feature of the head of rib 2 separates the superior from inferior articular facet/surface?
the interarticular crest
What feature may be identified on the neck of rib 2?
the crest of the rib
What feature may be identified on the tubercle of rib 2?
the articular surface of the tubercle
the non-articular surface of the tubercle
Which feature of the tubercle of rib 2 is closer to the head of the rib?
the articular surface of the tubercle
What unique feature is present on the body of the second rib?
tuberosity for the serratus anterior
What distinguishes the vertebral end of rib 11 from typical ribs?
the single articular surface
absence of a well-developed crest on the neck
tubercle may be absent or present
if present on contains a non-articular surface
What helps distinguish the vertebral end of the twelfth rib from other ribs?
the head has a single articular surface
the crest of the neck is poorly developed
the tubercle is absent
