Which structure is primarily serviced by the Maxillary Nerve (CN V2)?

The Maxillary Nerve, also known as CN V2, is a branch of the trigeminal nerve (CN V) and is primarily responsible for sensory innervation to the middle region of the face. The correct answer highlights its role in supplying the skin over the maxilla and upper lip.

The maxillary nerve extends from the trigeminal ganglion and innervates various areas, including the cheek, nasal cavity, palatine area, and the maxillary teeth. It also provides sensation to the skin over the maxilla and upper lip, making this option the most accurate representation of the areas serviced by the Maxillary Nerve.

In contrast, the other options refer to areas innervated by different branches of the trigeminal nerve or other structures. For example, the mandible and lower lip are primarily serviced by the mandibular nerve (CN V3), while the cornea and scalp receive sensory fibers from the ophthalmic nerve (CN V1) and other cranial nerves. Muscles of mastication are innervated by the mandibular nerve as well, highlighting that the correct answer specifically pertains to sensory function in the region supplied by the maxillary nerve.