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7 Cards in this Set
- Front
- Back
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What is in the Inferior Mediastinum?
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Anterior - remnants of thymus, lymph nodes, fat, and CT
Middle - Heart, pericardium, roots of great vessels, arch of azygous vein, main bronchi Posterior - esophagus, thoracic aorta, azygos and hemiazygos vein, thoracic duct, vagus nerves, sympathetic trunks, splanchnic nerves |
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Where does the superior mediastinum pass through?
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inferiorly from superior thoracic aperture passing through sternal angle and IV disc of T4-T5 vertebra
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What are the contents of the Anterior Mediastinum?
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loose CT, fat, lympathic vessels, few lymph nodes, branches of internal thoracic vessels
in infants it contains the inferior part of the thymus |
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What are the contents of the superior mediastinum?
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Thymus
brachiocephalic veins, superior part of SVC, arch of aorta (brachiocephalic trunk, L common carotid A, L subclavian A) Vagus and Phrenic N Cardiac plexus of N Left recurrent laryngeal N Trachea Esophagus Thoracic Duct |
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What happens at Transverse THoracic Plane?
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plane passing through angle of Louse at junction of T4-T5
Ascending Aorta ends Arch of Aorta begins and ends Descending Aorta begins Trachea bifurcates to right and left pulmonary bronchi |
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What are the nerves in the Superior Mediastinum?
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Right Vagus:
-enters thorax anterior to R subclavian --> R recurrent laryngeal N -R recurrent laryngeal ascends between trachea and esophagus to supply laynx -then passes posterior to R brachiocephalic V, SVC, and root of right lung branches --> pulmonary plexus single nerve --> esophageal plexus contributes to --> cardiac plexus Left Vagus: -contributes to posterior root of left lung --> pulmonary and cardiac plexuses -joins R vagus --> esophageal plexus |
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What does the Phrenic Nerve supply?
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diaphragm
pleura, pericardium, and peritoneum |
