Flashcards in Spinal Lecture 7 Deck (71)
What are the main functions/purpose of the ribs?
Protection of lungs, heart, pericardium
Force transferal / attenuation
Stability to the thoracic as a result of it’s circular ring it forms
What are the main functions of the ribs?
Protection and movement
What occurs to the ribs as we age?
elasticity decreases with age therefore ribs become more rigid and fragile
How many pairs of ribs are there?
What is the ribs function with regard to breathing?
Help guide breathing and resist the elastic recoil of the lungs
During inspiration the ribs spin and rotate because the costocartilages can spin and twist allowing full movement
How many superior "true" ribs are there?
What connects the superior 7 ribs to the sternum?
Which ribs have costal cartilages that join?
Which ones don't attach to the cartilage?
8-10 rib cartilages join
11 & 12 have free ends not attaching to the cartilage (floating ribs)
What is the implications of ribs 8-10 merging with the costal cartilage above?
What is the purpose of the intercostal muscles?
Add a layer of protection
Protect and guide ribs through their movement
What can rib one cause narrowing of?
Rib one influences the thoracic outlet space – when it moves it changes the angle and can lead to narrowing of this area
What is the intercostal spaces between ribs filled with?
intercostal spaces between ribs filled with intercostals muscles, nerves, veins and arteries
What plane are the superior ribs on?
superior ribs are on a more horizontal plane, less oblique than inferior ribs
Which rib is most oblique?
Which ribs increase in length and at which rib do they start decreasing in length again?
ribs 1-7 increase in length and then decrease down to 12
Describe the movement of ribs 1-5
ribs 1-5 mov’t is more pump-handle like….axis of movement is posterior, anterior ends move up and down
Describe the movement of ribs 6-10
ribs 6-10 movement is bucket-handle like….axis of movement is medial, lateral sides move up and down
Describe the shaft of a typical rib
thin and flat
grooved internally near it’s lower border—costal groove for intercostal nerve
lower border is sharp
upper border is rounded
A typical rib articulates with how many vertebral bodies
What angle does the rib come out from the vertebral body at?
Posterior and lateral angle
What is the purpose of the costal groove. What is an implication with regard to fracture?
The costal groove is where the nerve typically sits for protection
Implication: can be displaced during fracture which could affect the nerve, artery and vein
Describe the anterior end of a typical rib?
small concave depression for it’s cartilage’s lateral end
forms costochondral joint
(Like an ice cream cone)
How many ribs attach to the sternum?
Rib = Costal
Cartilage = Chondra
What are the 4 articulations of the rib?
describe the posterior end of a typical rib
has a neck, head, tubercle
the head has 2 facets which are separated by a transverse crest
In a typical rib what does the larger and smaller facets articulate with?
Lower, larger facet articulates with body of the corresponding vertebrae
the superior and smaller facet articulates with the body of the superior vertebrae
Forms costovertebral jt
Describe the neck of a typical rib
the neck is the flat part beyond the head
is oblique and faces superior and anterior
posterior inferior surface is rough and pierced by a foramina
Describe the tubercle of a typical rib
tubercle is posterior, external at junction of the neck and shaft
separated into medial articular facet and lateral non-articular facet
anterior to the TP of it’s corresponding vertebrae
forms the costotransverse joint