Thorax Flashcards
What are on the lateral edges of the manubrium?
facet for articulation with cc of 1st rib
demi-facet for articulation with cc of 2nd rib
on the body of the manubrium, which facets and demi facets articulate with which ribs?
facets articulate with cc of ribs 3-6
demi facets ribs 2 and 7
what is the axillary tail?
an extension of the tissue of the breast that extends into the axilla
describe the head of a typical rib
wedge shaped
2 articular facets separated by bone
one facet articulates with the numerically corresponding vertebrae, the other articulates with the vertebrae above
describe the neck of a typical rib
connects head to body
where neck meets body there is a tubercle with a facet for articulation with the transverse process of the corresponding vertebrae
describe the body/shaft of a typical rib
flat and curved
has a costal groove for neurovascular supply of thorax, protecting vessels and nerves from damage
Describe rib 1
shorter and wider than the other ribs
one facet - articulates with corresponding vertebrae (no thoracic vertebrae above it)
superior surface marked by 2 grooves for subclavian vessels
describe rib 2
thinner and longer than rib 1
2 facets as normal
roughened area on sup surface for serratus anterior
describe how rib 10 is different
only has one facet - articulates with corresponding vertebrae
describe how ribs 11 and 12 are different
no neck
one facet - articulate with corresponding vertebrae
Posterior articulations of ribs 1-12
COSTOTRANSVERSE JOINT - between tubercle of rib and transverse costal facet of corresponding vertebrae. T1-10
COSTOVERTEBRAL JOINT - between the head of the rib, superior costal facet of corresp. vertebrae and inferior costal facet of vertebrae above adn intervertebral disc
anterior articulations of the ribs
ribs 1-7 attach to the sternum
ribs 8-10 attach to the costal cartilages superior to them
ribs 11 and 12 don’t have an anterior attachment - “floating ribs”
what do the superior and inferior costal facets of thoracic vertebra articulate with?
superior - head of the adjacent rib
inferior - head of the rib below
for T2-9, these facets are demi-facets
what does transverse costal facet of thoracic vertebrae articulate with?
tubercle of rib
what is different about the superior facet of T1?
not a demi-facet as is the only vertebrae to articulate with the 1st rib
what is different about the facets of T10?
both whole facets which articulate with the 10th rib
located on the body and pedicle
what is different about T11 and T12?
each have a pair of entire costal facets, located on the pedicles
what joints are present in the vertebral column?
BETWEEN VERTEBRAL BODIES-joined by intervertebral fibrocartialge discs - cartilagenous joint - symphysis
BETWEEN VERTEBRAL ARCHES - formed by articulation of sup and inf articular processes of adj vertebrae. synovial joint
