Nerves supply in mediastinum Flashcards
Nerves supply in mediastinum
- Phrenic Nerves
- vagus Nerve
- Sympathetic Trunks
Phrenic Nerves supply
Superior & middle mediastinum
vagus nerves supply
Superior & posterior mediastinum
Phrenic Nerves Origin
anterior rami of C 3, 4, 5.
Vagus Nerves Origin
10th cranial nerve
Motor innervation of RT and LF Phrenic Nerves
diaphragm
Sensory innervation of RT and LF Phrenic Nerves Phrenic Nerves
- Diaphragm
- Mediastinal & central part of diaphragmatic pleura
- Fibrous pericardium & parietal layer of serous pericardium
- Peritoneum covering central part of undersurface of diaphragm
Left Phrenic Nerves descends
to the left side of: arch of aorta, pericardium
Right Phrenic Nerves descends
to the right side of: right brachiocephalic vein, SVC, pericardium, & IVC.
Phrenic Nerves
Both descend lateral to vagus nerves and anterior to the roots of lungs
Vagus Nerves Branches
Right and left Vagus Nerve
Right Vagus Nerve descends
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.
Left Vagus Nerve descends
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
Both Vagus nerves give branches to
esophagus, cardiac plexus and pulmonary plexus.
Branch of Lt Vagus nerves in the In Thorax
Left recurrent laryngeal nerve
Left recurrent laryngeal nerve مهم
curves below arch of aorta, behind ligamentum arteriosum, ascends in groove between trachea & esophagus to reach the neck.
Left recurrent laryngeal nerve supplies
heart, trachea, esophagus (in thorax) & larynx (in neck)
Left recurrent laryngeal nerve clinically
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
sympathetic trunks consists of
two parallel cords punctuated by 11 or 12 ganglia
The ganglia are connected to
thoracic spinal nerves
The ganglia are connected to adjacent thoracic spinal nerves by
white and gray rami communicantes
Sympathetic Trunks beginning
the cervical part continues as thoracic part by
passing in front of neck of 1st rib.
Sympathetic Trunks Termination
the thoracic part continues as lumbar part by
passing posterior to diaphragm, under medial arcuate ligament.
Sympathetic Trunks in upper part of thorax descend
anterior to neck of ribs
Sympathetic Trunks In lower part of thorax
descend on
lateral aspect of vertebral bodies
from upper 5 ganglia
Visceral branches (postganglionic) to heart, lungs, esophagus, descending aorta.
from 5th to 9th ganglia
Visceral branches (preganglionic) to abdominal organs: • Greater splanchnic nerve
from 10th & 11th ganglia
Visceral branches (preganglionic) to abdominal organs: Lesser splanchnic nerve
from 12th ganglia
Visceral branches (preganglionic) to abdominal organs: Least splanchnic nerve
