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16 Cards in this Set
- Front
- Back
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structures in the superior mediastinum
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-thymus
-brachiocephalic veins -superior vena cava -aortic arch and its branches (brachocephalic, L common carotid, L subclavian) -vagus n -L recurrent laryngeal n -phrenic n -trachea -thoracic duct -esophagus -sympathetic chain |
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structures of the anterior mediastinum
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-part of thymus
-loose CT -fat -lymph nodes -vessels -branches of internal thoracic a -sterno pericardial ligament |
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contents of the middle mediastinum
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-heart
-pericardium -phrenic n -primary bronchi -origins of the great vessels |
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lymphatics of the middle mediastinum
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subepicardial lymph plexus
-lymph vessels join to form single vessel -drain into inferior and superior tracheobronchial lymph nodes |
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contents of the posterior mediastinum
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decending aorta
thoracic duct azygous system of veins esophagus nerves lymphatics |
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branches of the thoracic aorta
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bronchial - 1 R, 2 L
esophageal - 2 mediastinal - to lymph nodes pericardial posterior intercostals - 3-11 subcostal - 12th rib superior phrenic - sup. surf of diaphragm |
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expanded end of thoracic duct at T12 vertebrae
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cysterna chyli
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thoracic duct route
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passes through aortic hiatus
ascends on R side crosses at T4-T6 empties into L IJV and L SCV |
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esophageal constrictions
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aortic constriction
bronchial constriction diaphragmatic constriction |
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esophageal plexus
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vagus n
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aortic plexus
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autonomic n
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main source of sympathetics to the abdomen
-preganglionic sympathetic -synapse at pre-aortic ganglion |
thoracic splanchnic nerves
-greater T5-9 -lesser T10-11 -least T12 |
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drains R side of thoracic and abdominal wall
-union of R subcostal and R ascending lumbar v -arches over root of R lung into SVC |
azygos v
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union of L subcostal and L ascending lumbar v
-drains L 9-11 intercostal spaces -crosses over to azygos at T9 |
hemiazygos
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-descends L side
-drains L 4-8 intercostal spaces -crosses over to azygos at T7 or 8 |
accessory hemiazygos
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R and L superior intercostal v
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-R drains into azygos
-L drains into L brachiocephalic |
