Intercostal Space, Muscles And Nerves Flashcards
From superior to inferior, what structures comprise the neurovascular bundle?
Intercostal vein, artery and nerve
Between which two intercostal muscles is the neurovascular bundle located?
Between the innermost and the internal intercostal
What part of the rib is the neuromuscular bundle located?
Costal groove
The internal and external intercostal muscles don’t occupy the whole rib, instead what do they develop into?
They become tendinous and develop into a thin aponeurosis
What is the orientation of the innermost intercostal muscle?
Merely vertical
What is the orientation of the external intercostal muscles?
Inferomedial (comes from sides into middle, obliquely)
What is the orientation of the internal intercostal muscles?
Inferolateral (lies in an angle from medial of thorax to lateral)
External intercostal muscles fill the intercostal space as far as ……..
Costochondral junction anteriorly
Internal intercostal muscles fill the intercostal space from the sternum to the …….
Costal angles posteriorly
What is the remaining part called that isn’t accompanied by internal intercostal muscles to the thoracic vertebrae?
Internal intercostal membrane
What space of the intercostal space does the innermost intercostal muscles occupy?
The central half of the space
Because the innermost intercostal muscles only occupy the central half of the space, what is the remaining space completed anteriorly by?
Anteriorly by the transverse thoracis muscles and posteriorly by the subcostalis muscles
Neurovascular bundles gives of a small ….. branch.
Collateral branch
Where is the collateral branch located?
Just above the top of each rib
