The Zygomatic nerve of CN V2 carries parasympathetic fibers from which ganglion of CN VII?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

The Zygomatic nerve of CN V2 carries parasympathetic fibers from which ganglion of CN VII?

Explanation:
Parasympathetic fibers to the lacrimal gland originate with the facial nerve, synapse in the pterygopalatine ganglion, and then hitchhike along branches of V2 to reach the gland. The zygomatic nerve carries these postganglionic parasympathetic fibers from the pterygopalatine ganglion via a communicating branch to the lacrimal nerve. So, the ganglion supplying these fibers is the pterygopalatine ganglion. The superior salivatory ganglion is involved earlier in the pathway as the site where preganglionic fibers synapse, but the actual postganglionic cell bodies for this route reside in the pterygopalatine ganglion. The geniculate ganglion is sensory, and the ciliary ganglion serves CN III, not VII.

Parasympathetic fibers to the lacrimal gland originate with the facial nerve, synapse in the pterygopalatine ganglion, and then hitchhike along branches of V2 to reach the gland. The zygomatic nerve carries these postganglionic parasympathetic fibers from the pterygopalatine ganglion via a communicating branch to the lacrimal nerve. So, the ganglion supplying these fibers is the pterygopalatine ganglion. The superior salivatory ganglion is involved earlier in the pathway as the site where preganglionic fibers synapse, but the actual postganglionic cell bodies for this route reside in the pterygopalatine ganglion. The geniculate ganglion is sensory, and the ciliary ganglion serves CN III, not VII.

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