What nerves does the maxillary division give off in the pterygopalatine fossa?

• A. Zygomatic nerve, pterygopalatine nerves (orbital, nasal, palatine, & pharyngeal branches), & PSA
• B. Infraorbital nerve, ASA nerve, MSA
• C. Ophthalmic nerve, maxillary nerve, mandibular nerve
• D. Nasopalatine nerve, greater palatine nerve, posterior superior alveolar nerve

Answer: (A)

In the pterygopalatine fossa, the maxillary division gives off several key sensory branches associated with the pterygopalatine ganglion. The zygomatic nerve travels laterally and sends branches to the face and also carries parasympathetic fibers to the lacrimal gland via the communicating branch. The pterygopalatine nerves form a group that includes orbital branches to the orbit, nasal branches (including the posterior superior nasal nerves and the nasopalatine nerve), palatine branches (greater and lesser palatine nerves), and a pharyngeal branch to the nasopharynx. In addition, the posterior superior alveolar nerve arises from the maxillary division in this region, supplying the posterior teeth.

This combination—zygomatic nerve, the set of pterygopalatine nerves (orbital, nasal, palatine, and pharyngeal branches), and the posterior superior alveolar nerve—reflects the branches of V2 that are given off in the pterygopalatine fossa. Other options either refer to branches that occur after the fossa (like the infraorbital/ASA/MSA chain) or list divisions of the trigeminal nerve rather than the specific branches exiting in this area, or omit branches that are characteristic of this region.