Lecture8: Nerves Of Thorax And Diaphragm Flashcards
As the Vagi pass through the thorax, they provide… to the thoracic viscera?
Parasympathetic innervation
Both right and left vagi give branches to?
Esophagus, pulmonary plexus, and cardiac plexus
The Right vagus nerve enters which division of the mediastinum?
The Superior
The left vagus nerve descends between both?
Left common carotid and left subclavian
What is the branch of the Left Vagus nerve?
The Left recurrent laryngeal nerve
Where does the Left Recurrent Laryngeal nerve recur?
Below the arch of aorta
Injury to left recurrent laryngeal nerve leads to?
Left vocal fold paralysis and hoarseness of voice
How does the Left laryngeal nerve get injured?
Via an aneurysm of the aortic arch and or a mediastinal tumor
Where does the Phrenic nerve arise from?
C3-C5
Where does the Phrenic nerve run relative to the root of the lung?
Anterior to it
Where does the Vagus nerve run relative to the root of the lung?
Posterior
What does the Phrenic nerve give motor supply to?
The diaphragm
What innervates the fibrous pericardium and both mediastinal and diaphragmatic pleurae?
The Phrenic nerve
The right Phrenic nerve descends in which position relative to the root of the lung?
In front of it
What does the Left Phrenic nerve descend between?
Both left common carotid and subclavian arteries
What do both Phrenic nerves lay relative to the root of the lung?
In front of it
What does the Right Phrenic nerve pierce on the inferior surface of the diaphragm?
The IVC
What does the Left Phrenic nerve pierce on the the inferior surface of the diaphragm?
The Left copula
What causes a complete paralysis of the corresponding half of the diaphragm?
Lesion of the Phrenic nerve
What is a hiccup?
An involuntary diaphragmatic spasmodic sharp contraction
What causes hiccups?
Stimulation of nerve endings in the digestive tract and or diaphragm
What is the diaphragm insertion?
Central tendon
What forms the left and right copula?
The elevated lateral parts of the central tendon
What is the diaphragm motor supply?
Phrenic nerve
What is the diaphragm sensory supply?
Left intercostal nerves
Which part of the diaphragm acts as a sphincter to the lower end of the esophagus?
Right crus
At what level is the IVC opening?
T8
Where is the IVC opening?
Central tendon
Where is the Oesophageal opening?
Right crus
What is the Oesophageal opening level?
T10
Where is the Aortic Opening?
Posterior to the median cruciate ligament
What is the aortic opening level?
T12
Structures passing through aortic opening?
Aorta, Azygos vein and thoracic duct
What is congenital hernia?
When the diaphragm fails to fuse thus leaving an opening
What is hiatal hernia?
When the fundus of the stomach herniates into the posterior mediastinum
Hiatal hernia symptoms?
Acid reflux
