1. The nasal glands are innervated with secretomotor from the greater petrosal nerve . 2. Preganglionic parasympathetic fibres exit the geniculate ganglion as the greater petrosal nerve . 3. The first is the greater petrosal nerve and the second is the chorda tympani. 4. This plexus gives off the lesser petrosal nerve . 5. The lesser petrosal nerve provides autonomic parasympathetic fibers that eventually innervate the parotid gland. 6. The visceral motor fibers pass through this plexus and merge to become the lesser petrosal nerve . 7. Some of the fibres from the internal carotid plexus converge to form the deep petrosal nerve . 8. The greater petrosal nerve , which carries preganglionic parasympathetic fibers, emerges from the anterior aspect of the ganglion. 9. The lesser petrosal nerve then travels anteriorly from the hiatus toward the foramen ovale, through which it exits the cranial cavity. 10. The tympanic plexus of nerves rejoin and form the lesser petrosal nerve and exit through the foramen ovale to synapse at the otic ganglion.
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