Prevertebral Ganglia Lie anteriorly to vertebral column 2 2 and near the arteries for which 4 they are named ◆1- Celiac ganglia(2) 9 2-Aorticorenal ganglia(2) 9 3-Sup. mesenteric ganglion 4-Inf. mesenteric ganglion
16 Prevertebral Ganglia Lie anteriorly to vertebral column and near the arteries for which they are named 1-Celiac ganglia （ 2 ） 2-Aorticorenal ganglia （ 2 ） 3-Sup.mesenteric ganglion 4-Inf. mesenteric ganglion 1 1 2 4 2 3
Communicating branches Concept: communicating branches is the nerve between sympathetic trunk and ant. branches of spinal nerves. White communicating branches: myelinated preganglionic fiber looks like white in fresh Gray communicating branches: unmyelinated postganglionic fiber looks like gray in fresh Grey communicating branch White communicating branch 17
17 Communicating branches Concept : communicating branches is the nerve between sympathetic trunk and ant.branches of spinal nerves. White communicating branches: myelinated preganglionic fiber looks like white in fresh. Gray communicating branches: unmyelinated postganglionic fiber looks like gray in fresh. Grey communicating branch White communicating branch
Preganglionic Fibers Preganglionic fibers 15 pairs white communicating branches Sympathetic trunk only spinal levels t1-L3 have white communicating branch)
18 Preganglionic Fibers Preganglionic fibers 15 pairs white communicating branches Sympathetic trunk (only spinal levels T1~L3 have white communicating branch)