Studies suggest that brain damage to the parietal lobe causes sensory neglect and that in turn causes extinction. Spatial neglect specifically leads to visual extinction. Neglect often follows right inferior parietal damage, and is characterized by impaired attention and lack of awareness for stimuli on the contralesional (left) side of space. Any kind of brain damage can lead to neglect, things like stroke, brain tissue death, or tumors, and cause the unilateral damage to one side of the parietal lobe. Overall a person with parietal brain damage still has intact visual fields.
