5- Posterior Mediastinum Flashcards Preview

Anatomy Of The Thorax > 5- Posterior Mediastinum > Flashcards

Flashcards in 5- Posterior Mediastinum Deck (11)
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1

Where do the vagus and phrenic nerves run in relation to the pericardium

Phrenic- front
Vagus- behind

2

Which levels does the trachea run from

T4-t6

3

Which vertebral levels does the oesophageal run from

C7-t11

4

Where are the 4 constriction on the oesophagus

Junction of pharynx
Crossed by aortic arch
Left bronchus
Where goes through diaphragm

5

How many splanchnic nerves are in the abdomen

3

6

Where do the sympathetic trunks run from

T5-t12

7

Describe the azygous veins

Drains posterior wall of chest and upper abdomen + posterior mediastinal organs
•Usually accessory hemiazygos (upper) and hemiazygos (lower) veins on left cross thoracic vertebral bodies to join single axygos vein on right
•Azygos vein arches over right lung root to enter SVC just above right atrium

8

What makes up the posterior mediastinum

Oesophagus
•Descending aorta
•Thoracic duct
•Azygos venous system
•Posterior mediastinal lymph nodes
•Thoracic sympathetic trunks
•Splanchnic nerves

9

Where does the oesophagus pass through the diaphragm at

T10

10

Describe the sympathetic trunks

Receive branches from spinal nerves T1 - L2
•Distribute sympathetic nerves to smooth muscle and glands throughout body
•Nerves to body wall synapse in ganglia of trunks
•Nerves to internal organs (viscera) synapse in local ganglia
•Also bring pain fibres back to CNS from viscera

11

What is the thoracic duct

Lymph duct returning lymph from lower limbs, pelvis, abdomen & left thoracic wall to blood
•Begins below diaphragm at cisterna chyli
•Starts between oesophagus and aorta on right
•Crosses behind oesophagus to left side between T7 and T4
•Drains into left brachiocephalic vein