Posted by Julia on September 12, 2009 at 22:54:28:
In Reply to: about the vagus nerve posted by Nick Ahn on September 12, 2009 at 20:05:42:
Direct quote from our notes: Parasympathetic...collateral (head) or intrinsic ganglion; never sympathetic.
This implies that parasympathetics inferior to the head are intrinsic. Wasn't this reinforced in class? That all the parasympathetics running through these plexi are pregangionic because they synapse within the organ itself? Further, in all my reading (which admittedly doesn't amount to much) the sympathetics are mentioned synapsing in the various aorta-associated ganglia but the parasympathetics are not, and in descriptions of organs the parasympathetics are synapsing within the tissue of the organ (ie intrinsic).