Nerves supply in mediastinum

Question 1

Nerves supply in mediastinum

Answer 1

1. Phrenic Nerves
2. vagus Nerve
3. Sympathetic Trunks

Question 2

Phrenic Nerves supply

Answer 2

Superior & middle mediastinum

Question 3

vagus nerves supply

Answer 3

Superior & posterior mediastinum

Question 4

Phrenic Nerves Origin

Answer 4

anterior rami of C 3, 4, 5.

Question 5

Vagus Nerves Origin

Answer 5

10th cranial nerve

Question 6

Motor innervation of RT and LF Phrenic Nerves

Answer 6

diaphragm

Question 7

Sensory innervation of RT and LF Phrenic Nerves Phrenic Nerves

Answer 7

• Diaphragm
• Mediastinal & central part of diaphragmatic pleura
• Fibrous pericardium & parietal layer of serous pericardium
• Peritoneum covering central part of undersurface of diaphragm

Question 8

Left Phrenic Nerves descends

Answer 8

to the left side of: arch of aorta, pericardium

Question 9

Right Phrenic Nerves descends

Answer 9

to the right side of: right brachiocephalic vein, SVC, pericardium, & IVC.

Question 10

Phrenic Nerves

Answer 10

Both descend lateral to vagus nerves and anterior to the roots of lungs

Question 11

Vagus Nerves Branches

Answer 11

Right and left Vagus Nerve

Question 12

Right Vagus Nerve descends

Answer 12

descends to the right side of: trachea, behind root of right lung (pulmonary plexus), (esophageal plexus), passes through esophageal opening of diaphragm to reach posterior surface of stomach.

Question 13

Left Vagus Nerve descends

Answer 13

to the left side of: arch aorta, behind root of left lung (pulmonary plexus), in front of esophagus (esophageal plexus), passes through esophageal opening of diaphragm to reach anterior surface of stomach

Question 14

Both Vagus nerves give branches to

Answer 14

esophagus, cardiac plexus and pulmonary plexus.

Question 15

Branch of Lt Vagus nerves in the In Thorax

Answer 15

Left recurrent laryngeal nerve

Question 16

Left recurrent laryngeal nerve مهم

Answer 16

curves below arch of aorta, behind ligamentum arteriosum, ascends in groove between trachea & esophagus to reach the neck.

Question 17

Left recurrent laryngeal nerve supplies

Answer 17

heart, trachea, esophagus (in thorax) & larynx (in neck)

Question 18

Left recurrent laryngeal nerve clinically

Answer 18

It passes between the pulmonary artery and the aorta, a region known clinically as the aortopulmonary window, and may be compressed in any patient with a pathological mass in this region.
This compression results in left vocal cord paralysis
and hoarseness of the voice

Question 19

sympathetic trunks consists of

Answer 19

two parallel cords punctuated by 11 or 12 ganglia

Question 20

The ganglia are connected to

Answer 20

thoracic spinal nerves

Question 21

The ganglia are connected to adjacent thoracic spinal nerves by

Answer 21

white and gray rami communicantes

Question 22

Sympathetic Trunks beginning

Answer 22

the cervical part continues as thoracic part by

passing in front of neck of 1st rib.

Question 23

Sympathetic Trunks Termination

Answer 23

the thoracic part continues as lumbar part by

passing posterior to diaphragm, under medial arcuate ligament.

Question 24

Sympathetic Trunks in upper part of thorax descend

Answer 24

anterior to neck of ribs

Question 25

Sympathetic Trunks In lower part of thorax

descend on

Answer 25

lateral aspect of vertebral bodies

Question 26

from upper 5 ganglia

Answer 26

Visceral branches (postganglionic) to heart, lungs, esophagus, descending aorta.

Question 27

from 5th to 9th ganglia

Answer 27

Visceral branches (preganglionic) to abdominal organs:
• Greater splanchnic nerve

Question 28

from 10th & 11th ganglia

Answer 28

Visceral branches (preganglionic) to abdominal organs:
Lesser splanchnic nerve

Question 29

from 12th ganglia

Answer 29

Visceral branches (preganglionic) to abdominal organs:
Least splanchnic nerve