T7 Superior, Posterior Mediastinum, diasphram
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What are the parts of the mediastinum?
- Inferior (which is made of anterior, posterior and middle)
What is in the superior mediastinum?
- Arch of aorta
- Brachiocephalic artery and veins
The Superior Vena Cava is formed at this level
The SVC enters the atrium at this level
The brachiocephalic vein is made of the Internal jugular and Subclavian behind this joint
The subclavian and Internal jugular veins come together to make this vein (starts with B)
What are those 3 big branches of the arch of the aorta?
- brachiocephalic artery
- Left common carotid
- Left subclavian
- (from right to left)
In fetal life, this duct helped by-pass the lungs. It connects the left pulmonary artery and the inferior surface of arch of aorta.
Where can you palpate the trachea?
Supra-sternal notch (T2)
What do you call where the trachea divides?
Which level does the trachea divide into left and right bronchi?
What can you find in the posterior mediastinum?
- Descending aorta
- Esophageal arteries
- Bronchial arteries
- Intercostals Subcostals arteries
- Thoracic duct
The aorta exits the thorax (passing behind the median arcuate ligament) at this level
What vertebral levels are the 3 narrowings of the oesophagus?
What 3 things indent the esophagus?
- Left bronchus
How many centimeters are the 3 narrowings of oesophagus?
Which nodes drain the esophagus?
- left gastric
Special question haha: thoracic duct crosses from the right side to the left side at this vertebral level
Another name for the 10th cranial nerve
Vagus aka the Wanderer
Where does the right crus originate?
L1, L2, L3
Where does the left crus originate?
What things go through the diaphram at T8
- Inferior vena cava
- R. phrenic nerve
What structures go through the diaphram at T10?
- left gastrics
What stuff goes through the diaphram at T12?
- azygos veins
- hemiazygos veins
- thoracic duct
What is the nerve supply to the diaphram?
Phrenic nerve (C3, 4, 5)
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