Thorax 5 superior MS

Question 1

Structure anterior to posterior

Answer 1

Thymus (not seen in adult dissection)
Veins 
Arteries 
Airways (trachea)
Alimentary Tract (esophagus)
Lymphatic Channels (thoracic duct)

Question 2

Venus blood flow from posterior to sternclavicular joint

Answer 2

Internal Jugular and Subclavian Veins
Brachiocephalic Veins
SVC

Question 3

Trachea and Esoaphagus

- which travels through inferior MS?

Answer 3

Esophagus only

Question 4

Sternal angle location?

Answer 4

2nd rib

T4-5

Question 5

Nerve travelling under (around) aortic arch

• rises from?
• travels

Answer 5

Left recurrent laryngeal nerve

• rises from left vagus nerve
• travels up with trachea

Question 6

Left vagus nerve travel path

Answer 6

Over subclavian art
Under brachiocephalic vein
With aortic arch 
Posterior after arch
With esophagus to abdomin

• medial and posterior to phrenic nerve

Question 7

Important ligament in superior MS

Answer 7

Ligamentum arteriosium

• between arch and pulm trunk
• fetal blood?

Question 8

Phrenic Nerve

• origination
• travel

Answer 8

Anterior Rami C 3-5
Over Subclavian
Under Brachiocephalic Vein
Towards diaphragm
- lateral to vagus nerve

Question 9

Phrenic Nerve innervation

Answer 9

Diaphragm only

Question 10

Left vagus nerve innervation

Answer 10

heart, lungs, esophagus

Question 11

Right and Left Recurrent laryngeal nerves

Answer 11

Branch of vagus
Right around subclavian
Left around arotic arch
Ascends between trachea and esophagus

Question 12

Azygus vein

• location
• dumps

Answer 12

Right side and posterior

- dumps into SVC at sternal angle (T4-5)

Question 13

Anterior Cardiac Veins empty directly into?

Answer 13

Right atrium

Question 14

Structure in the superior MS?

Answer 14

Great Vessels
-Bachiocephalic Veins
- SVC
- Aortic Arch
- Pulmonary Arteries (on the border)
Others
- vagus and phrenic 
- left recurrent laryngeal 
- trachea 
- esophagus
- thoracic duct

Question 15

Pulmonary Veins

- which mediastinum?

Answer 15

Posterior or Middle MS

- not clear location

Question 16

Both superior and middle MS?

Answer 16

Great vessels

• SVC
• Azygus Vein (border - drains at sternal angle)

Question 17

Posterior MS structures

Answer 17

Thoracic aorta
Thoracic duct
Azygos and hemiazygos veins
Esophagus (with vagus nerves
Sympathetic Trunks

Question 18

Both superior and posterior MS?

Answer 18

esophagus
vagus nerves
thoracic duct

Question 19

Middle Mediastinum

Answer 19

Heart
Ascending Aorta
Pulmonary Trunk (border)
Pulmonary Veins