1 - The Thorax Flashcards
Medial
closer to the middle
Lateral
closer to edges
Anterior (ventral)
front
Posterior (dorsal)
back
Main features of the thoracic cage
The sternum, vertebrae ribs and costal cartilages
Main features of the thoracic cage
The sternum, vertebrae ribs and costal cartilages
The Clavical
Forms the border where the thorax begins (not part of the thoracic cage)
The Sternoclavicular joint
Where the clavical meets the sternum
The Acronium process of the Scapula
Highest point of the shoulder where the clavical runs
The jugular
The derpression where the sternum starts
3 major parts of the sternum
The maubrium, the body and the xiphoid process
Sternal angle
- Between the manubrium and the body also the point of attachment for the costal cartilage of the 2nd rib.
- Marks the difference between the superior and inferior mediastinum
Facets
points of attachment for the costal cartilages 1-7
How many thoracic vertebrae are there?
12
What are the 2 different attachement sites on the thoracic vertebrae
1 - the tubicle to the transverse process
2 - head to the demi facets
Where are the neurovascular bundles found on the ribs?
The Costal groove
Why is rib 1 “atypical”?
Its flat and has a singular articulate facet
Why are ribs 11&12 “atypical”?
They are known as the floating ribs, they do not have costal cartilage and only articulate with one vertebrae.
True Ribs
Direct articulatuon via the costal cartilage to the strenum
False Ribs
Articulate to the sternum via another costal cartilage.
Floating RIbs
No costal cartilage
External Intercoastals
- Paired muscles on either side of the thorax
- ATERIOINFERIOR - downwards and inwards
- mostly assist in forced inspiration also play a tonal role.
Internal Intercostals
- lie deep and run 90 degrees to the externals
- play a role in forced expiration
Posterior intercostal muscles of the…
Aorta
The subclavian artery
A branch of the aorta where the posterior intercostals come off. (They anatasome)
