Which division supplies the blue area and is purely sensory?

Which division supplies the blue area and is purely sensory?

• A. Ophthalmic (V1)
• B. Maxillary (V2)
• C. Mandibular (V3)
• D. Mixed nerve (with motor fibers)

Answer: (B)

The blue area is supplied by the maxillary division of the trigeminal nerve. This branch, V2, is purely sensory and innervates the midface region—the upper teeth and their supporting tissues, the upper lip, cheek, palate, and adjacent nasal mucosa—without any motor fibers. That’s why it’s the correct choice for a region that is sensation-only. The other divisions have different roles: V1 (ophthalmic) is also purely sensory but covers the forehead and eye area, not the midface; V3 (mandibular) is mixed, carrying sensory information from the lower face and teeth plus motor fibers to muscles of mastication; and a “mixed” designation would indicate motor involvement, which isn’t the case for the blue area.

The blue area is supplied by the maxillary division of the trigeminal nerve. This branch, V2, is purely sensory and innervates the midface region—the upper teeth and their supporting tissues, the upper lip, cheek, palate, and adjacent nasal mucosa—without any motor fibers. That’s why it’s the correct choice for a region that is sensation-only. The other divisions have different roles: V1 (ophthalmic) is also purely sensory but covers the forehead and eye area, not the midface; V3 (mandibular) is mixed, carrying sensory information from the lower face and teeth plus motor fibers to muscles of mastication; and a “mixed” designation would indicate motor involvement, which isn’t the case for the blue area.