Nerves

Question 1

Phrenic nerve origin and root value

Answer 1

In neck from c3, c4 and c5

Question 2

How does phrenic nn enter thorax

Answer 2

Through thorathic inlet in front of subclavian aa

Question 3

Mediastinums in which phrenic nn pass

Answer 3

Superior and middle mediastinum

Question 4

Phrenic relation to lung roots

Answer 4

Behind

Question 5

Sturctures related to right phrenic n.

Answer 5

Right brachiocephalic vein
SVC
Right atria
IVC

Question 6

Structures related to left phrenic n.

Answer 6

Left common carotid artery
Left subclavian artery
Aortic arch
Left ventricle

Question 7

Why’s is right phrenic short?

Answer 7

Almost vertical and higher right copula

Question 8

Rt phrenic n. End

Answer 8

Vena cava opening of diaphragm

Question 9

Lt. phrenic End

Answer 9

Lt. cupola diaphragm

Question 10

Phrenic nerve Branches

Answer 10

Motor to diaphragm *Sensory to mediastinal & diaphragmatic pleura, fibrous & parietal layer serous pericardium, peritoneum

Question 11

Vagus nerve Origin

Answer 11

Inside skull, from medulla

Question 12

Vagus nerve enters thorax

Answer 12

Through inlet, infront of subclavian aa

Question 13

Vagus nerve mediastinum it passes

Answer 13

Sup & post

Question 14

Vagus nerve relation to lung root

Answer 14

Behind lung root, forming post pulmonary plexus

Question 15

Rt. Vagus nerve Structures related to it in sup mediastinum

Answer 15

Rt. brachiocephalic v. & SVC

Question 16

Lt. Vagus nerve Structures related to it in sup mediastinum

Answer 16

Lt. CCA & Lt. subclavian a., aortic arch

Question 17

Right Vagus nerve End

Answer 17

esophageal opening diaphragm as post gastric nn

Question 18

Left Vagus nerve End

Answer 18

esophageal opening diaphragm as ant gastric nn

Question 19

Vagus nerve Branches in thorax

Answer 19

Cardiac, pulmonary, esophageal & Lt. recurrent laryngeal branches

Question 20

Sympathetic chain enters thorax

Answer 20

Infront of 1st rib neck, as cervical part continuation

Question 21

Sympathetic chain mediastinum it passes

Answer 21

Superior and posterior mediastinum

Question 22

Sympathetic chain End

Answer 22

Behind diaphragm med. arcuate ligament, to continue as lumbar part

Question 23

Sympathetic chain Branches in thorax

Answer 23

White & gray rami communicans with spinal nerves. *Aortic, esophageal, cardiac & pulmonary plexuses *Greater, lesser & least splanchnic