Which division of the trigeminal nerve supplies the green area and is purely sensory?

• A. Ophthalmic (V1)
• B. Maxillary (V2)
• C. Mandibular (V3)
• D. Motor root of trigeminal nerve

Answer: (A)

The forehead/green area is supplied by the ophthalmic division of the trigeminal nerve, and this division is purely sensory. It carries sensation from the forehead, upper eyelid, cornea, and related areas, but it has no motor fibers. The branches—frontal (giving supraorbital and supratrochlear nerves), nasociliary, and lacrimal—pass through the orbit and provide the sensory input you feel in that region. In contrast, the maxillary division supplies the midface (cheek, upper lip) and is also purely sensory, while the mandibular division supplies the lower face and carries motor fibers to the muscles of mastication. The motor root is a separate pathway and not a sensory division. So the green area being forehead/eyebrow region aligns with the ophthalmic division, which is purely sensory.