Question

Enumerate the three divisions of the Portio Major of CN V and their modality characteristic.

Answer 1

The three divisions of the Portio Major of CN V are the mandibular, maxillary, and ophthalmic divisions. They have both motor and sensory fibers and are responsible for controlling muscles and providing sensation to specific regions.

Step-by-step explanation:

1. Mandibular division: This division of the Portio Major of CN V carries both motor and sensory fibers. It controls the muscles of mastication and also provides sensation to the lower teeth, lower lip, and jaw.
2. Maxillary division: This division carries both motor and sensory fibers. It controls the muscles of the upper lip and provides sensation to the upper teeth, upper lip, and cheek.
3. Ophthalmic division: This division carries both motor and sensory fibers. It controls the muscles that move the eyeball and provides sensation to the forehead, scalp, and cornea.