Anatomy books

Wednesday, April 24, 2019

summary of Celiac plexus : easy and simple way


Celiac plexus :
It is the largest  autonomic nerve plexus  of posterior abdominal wall which unites with celiac ganglion 

Why  coeliac plexus is also  known as solar plexus ? 

because of its sun ray like  radiating nerve fibers

location of celiac trunk 

at the level of T 12 and L 1 verterbra

It surrounds the coeliac artery & root of superior mesenteric artery  




       Celiac plexus present in front of the crus of the diaphragm






       Celiac  plexus is situated posterior to stomach & lesser sac



       It lies medial to supra renal gland & above the upper border of the pancreas  
 






Formation of celiac plexus:  Celiac plexus is formed by two celiac ganglions and nerve fibres


       Celiac ganglion : 
  it has a larger upper part  and smaller lower part also known as aorticorenal ganglion  


       Nerve fibres of the celiac plexus : 3 types of nerve fibres  present in the celiac plexus


  1. Sympathetic fibre
  2. Parasympathetic fibre :
  3. General visceral afferent fibre



Sympathetic fibre

       Greater splanchnic nerves joins the upper part of the celiac ganglion  (it contain 

preganglionic sympathetic fibres which synpse with celiac ganglion)

       lesser splanchnic nerves joins the aorticorenal ganglion  ( it is also  Preganglionic 

sympathetic fibres which synapse with aorticorenal ganglion )

       after synapsing Postganglionic sympathetic fibres leave coeliac & aorticorenal ganglion  

 

 


 

       Parasympathetic fibre : Preganglionic  vagal fibres 




       General visceral afferent fibre :

       Sensory phrenic fibres reach the plexus along the inferior phrenic artery
 







       Primary sensory sympathetic afferent fibers (red) shown in relation to posterior horn tract cells (green) conveying visceral information to the thalamus and to general visceral efferent neurons (blue).



       Visceral afferents in the coeliac plexus convey pain and sensation from upper abdomenal viscera

       Clinical anatomy : celiac plexus block
       This method might be done (often bilaterally) for pain relief in situations regarding cancer of the stomach or pancreas .



Branches of celiac plexus
Number of secondary plexus arises from the celiac plexus


 

Hepatic plexus
Left gastric plexus
Splenic plexus
Suprarenal plexus
Renal plexus
Testicular plexus
Ovarian plexus
Superior mesenteric plexus


Summary of nerves of celiac plexus
  1. Preganglionic and postganglionic sympathetic fibres
  2. Preganglionic parasympathetic (vagus nerve ) fibres
  3. General visceral afferent fibres 



 
Youtube video: https://youtu.be/0vXM7pcsd8M
 


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