The lesser petrosal nerve carries mainly parasympathetic fibers destined for the parotid gland (Fig. 8.150). The preganglionic parasympathetic fibers are located in the glossopharyngeal nerve [IX] as it exits the jugular foramen at the base of the skull. Branching from the glossopharyngeal nerve [IX] either within or immediately outside the jugular foramen is the tympanic nerve (Fig. 8.150B).