Thorax Flashcards
What does the Inferior Thoracic Aperture consists of?
Bone, cartilage, ligament form its margin closed by the diaphragm.
What are the functions of the thoracis wall?
-Breathing
-protection of vital organs
Boundaries of the thoracic wall
A; sternum
L:ribs
P; 12 thoracic vertebrae and discs
What do the superior aperture consist of:
P: body t1 vertebrae
A; manubrium of sternum
important for structures that pass btw the neck, head, thorax vertically through aperture
What consists of the thoracic outlet?
Brachial plexus, subclavian artery, subclavian vein- runs inferiorly through 1st rib
What are the true ribs
1-7
directly articulates/attaches
what are the fake ribs
8-12
attached to the costal cartilage
what are the floating ribs
11-12
The sternal angle marks what important clinical levels?
-transition lvl- T4 and T5
-tracheal bifurcation
-superior and middle mediastinum
-thoracic lymphatic duct
-aortic arch
what 3 flat muscles are found in each intercostal space that pass btw ribs
external
internal
innermost
What does external m. do?
aid w expansion of breath
what does internal m. do?
aid with exhalation
What is the neurovascular bundle in the ribs?
the intercostal : artery, vein, nerve within the lower costal groove.
Where does the anterior rami run?
continue as intercostal nerve but runs in : T1-T11
Myotome
group of muscles supplied by the anterior and posterior ramus
