1. The postganglionic parasympathetic fibers leave the pterygopalatine ganglion in several directions. 2. The ciliary ganglion is a " parasympathetic " ganglion. 3. The ventricles are more richly innervated by sympathetic fibers than parasympathetic fibers. 4. Some typical actions of the sympathetic and parasympathetic systems are listed below. 5. As a result, the postsynaptic parasympathetic nerve fibers are very short. 6. The glossopharyngeal nerve has parasympathetic fibers that innervate the parotid salivary gland. 7. It also supplies preganglionic parasympathetic fibers to several head and neck ganglia. 8. Parasympathetic innervation serves to increase the flow of saliva from these glands.9. Digoxin also has important parasympathetic effects, particularly on the atrioventricular node. 10. This parasympathetic activity is further increased during conditions of elevated blood pressure.
