BIOC32H3 Lecture Notes - Lecture 5: Sympathetic Nervous System, Sympathetic Trunk, Cranial Nerves
Document Summary
As we going to now, we are going to an autonomic way of seeing the sympathetic division. Figure: all the red lines are pre and post ganglionic sympathetic nerve fibers. The pre ganglionic fibers tend to be short, so the consequence of this is that the ganglia in the ns are actually quite close to the cns (brain and spinal cord). You have the left and right chain ganglia, which run parallel to the spinal cord. It"s here where the pre ganglionic fibers terminate and the post ganglionic fibers have their cell bodies interact together. The image on the left has something called the sympathetic trunk ganglia. Imagine if the spinal cord is running through this region, you can see swellings that run parallel to the spinal cord. These are the ganglia, and this is where the pre and post ganglia meet. If you look at the diagram, all the red lines are your pre-sympathetic nerve fibers.
