mediastinum

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created 2 years ago by Brittani_Berg
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1

anterior mediastinum

lies between sternum/ transversus thoracis muscle and pericardial sac.

filled with loose connective tissue and fat

2

contents of superior mediastinum

thymus

great vessels

nerves

trachea

esophagus

thoracic duct

prevertebral muscles

3

great vessels of superior mediastinum

left and right brachiocephalic vein, superior vena cava, arch of aorta (brachiocephalic trunk, left common carotid artery, left subclavian artery), phrenic nerve

4

Nerves of superior mediastinum

left vagus nerve - left recurrent laryngeal nerve (sensory nerve that innervates the larynx.

right vagus nerve - right recurrent laryngeal nerve

5

surface reflections of superior vena cava in superior mediastinum

superior vena cava formed at level of 1st costal cartilage.

SVC enters heart at level of 3rd costal cartilage

6

surface reflection of arch of aorta in superior mediastinum

starts at right sternal angle and ends at left sternal angle

7

surface reflection of brachiocephalic artery in superior mediastinum

divides at right sternoclavicular joint

8

surface reflection of left common carotid and subclavian arteries in superior mediastinum

pass posterior to the left sternoclavicular joint

9

contents of posterior mediastinum

thoracic aorta, thoracic duct, lymph nodes, esophagus, esophageal plexus, and trachea

10

thoracic sympathetic trunk of posterior mediastinum contains?

sympathetic ganglion, white ramus communicans, and gray ramus communicans.

11

sympathetic ganglion of thoracic sympathetic trunk

postganglionic neuron cell bodies

12

white ramus communicans

preganglionic fibers entering the chain/trunk.

13

gray ramus communicans

postganglionic fibers exiting the chain/trunk