Ribs Flashcards
How many pairs of ribs are there?
12
What ribs are the true ribs?
1-7
How do the true ribs articulate with the sternum?
Costal cartilages
What ribs are the false ribs?
8-10
What do the false ribs articulate with?
Costal margin
What ribs are the floating ribs?
11 and 12
Where do the floating ribs terminate?
Abdominal musculature
What is the pattern of length seen in the ribs?
Ribs increase in length from 1-7 and decrease in length 8-12
What end of the ribs is often used for age estimation?
Sternal end
What edge of the rib is the ‘sharp’ edge?
Caudal (cranial is more blunt)
Name the 2 kinds of ribs
Typical and Atypical
How many articular facets does a typical rib usually have?
3 (superior and inferior and articular facet of tubercle)
Rib one has 2 grooves for which vascular structures?
Subclavian artery and vein
What rib has a tubercle for scalene anterior?
Rib 1
Where does scalene anterior run to and from?
From C3-C6 transverse processes to scalene tubercle on rib 1
What movements does scalene anterior produce?
Raises rib 1, flexion and rotation of neck
In what direction does rib 2 deviate?
Inferiorly
What muscles attaches to rib 2?
serratus anterior and scalene posterior
Where does serratus anterior run to and from?
Where does scalene posterior run to and from?
It runs to the second rib from the scapula
it runs to the second rib from the posterior tubercles of transverse processes of cervical vertebrae C4-C6
What movements does scalene posterior produce?
raises rib 2, flexion and rotation of neck
Name the atypical ribs
1,2 11 and 12
How many articular facets does rib 11 have on its head?
1 singular one
What feature does rib 11 lack?
Tubercle
What feature is ‘shallow’ on rib 11?
Costal groove
