Which branch of CN V2 connects postganglionic parasympathetic fibers to the lacrimal nerve of CN V1?

• A. Zygomatic nerve
• B. Infraorbital nerve
• C. Superior alveolar nerve
• D. Zygomaticotemporal nerve

Answer: (A)

Parasympathetic fibers destined for the lacrimal gland reach the lacrimal nerve by hitchhiking with a branch of the maxillary division (V2). After exiting the pterygopalatine ganglion, the postganglionic fibers travel along the zygomatic nerve and connect to the lacrimal nerve (V1) through a small communicating branch, delivering the secretomotor input to the lacrimal gland. The zygomatic nerve is the V2 branch that serves this connection. The infraorbital and superior alveolar nerves are involved with other midface regions and teeth, not lacrimal innervation. The zygomaticotemporal branch can be involved in related communications, but the primary V2 pathway for linking to the lacrimal nerve runs through the zygomatic nerve.