Anatomy and Cell Biology 3319 Lecture Notes - Lecture 15: Anterior Ramus Of Spinal Nerve, Posterior Ramus Of Spinal Nerve, Postganglionic Nerve Fibers
24 Oct 2018
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To skeletal muscles (voluntary control: one neuron (cns to. Autonomic ns: smooth & cardiac muscle, glands, visceral organs, two neurons (pre- effector muscle) ganglionic, post- ganglionic) Short post-ganglionic fibers: within walls or close to walls of organ. Sympathetic: overall pathway (1)#preganglionic#cell#bodies# (2)# communicans (3)# white#ramus# post:ganglionic#neurons## (4)# ramus#communicans grey: white ramus communicans: nerve bundle that allows the sympathetic nerve fibers to get to the sympathetic trunk. Sympathetic trunk is like a highway: once we have the preganglionic neuron enter it, it has a lot of diff routes to take, entered sympathetic trunk through white ramus communicans, exits through grey ramus communicans. Superior cervical ganglia is still part of the sympathetic trunk. Sympathetic: thoracic (1) preganglionic#neurons#from(t1=t6( (2)#via(the(same(root(to#sympathehc#trunk# (3)#ophon#1:(synapse(with(closest(sympathe/ c(trunk(post:ganglionic#neuron#then( directly(to(organ(passing(through(pulmonary,(esophageal,(cardiac(plexus( Sympathetic: thoracic (1) preganglionic#neurons# (2)# (3)#ophon#1 to#sympathehc#trunk# post:ganglionic#neuron# Innervation goes up then down: bc during embryonic development, our heart developed from the neck.
