The ramifications of the three principal branches of the trigeminal nerve—at the supraorbital, infraorbital, and mental foramen—are distributed on a vertical line (in anterior view) passing through the middle of the pupil.
The distribution of the effects of the three primary branches of the trigeminal nerve, located at the supraorbital, infraorbital, and mental foramina, is depicted as a vertical line in an anterior view, crossing the center of the pupil.