PNS sacral outflow

Question 1

Where do preganglionic sacral parasympathetic fibers arise and how do they exit spinal cord?

Answer 1

from the S2-S4 spinal cord regions in an intermediolateral cell column. they exit via the ventral roots.

Question 2

where do PNS preganglionic fibers course to?

Answer 2

small postganglionic parasympathetic pelvic ganglia that are located in or close to the wall of the organs that they innervate and synapse.

Question 3

What do PNS postganglionic axons innervate?

Answer 3

important targets like excretory sphincters of the urethra and rectum as well as sex organs/erectile tissue of genitalia that are responsible for erection