Non-dominant, usually right, posterior-parietal-lobe damage can cause ignorance {neglect, vision}| {visuo-spatial hemi-neglect} {hemi-neglect} of stimulus that normally stimulates V1 in opposite, usually left, space half {hemifield}, including opposite body half. Patients do not realize that they cannot see that space side. Right or left Brodmann-area-7 damage can cause neglect of opposite-space half [Berti and Rizolatti, 1992] [Bisiach, 1988] [Bisiach, 1992] [Bisiach and Luzzatti, 1978] [Driver and Mattingley, 1998] [Heilman and Valenstein, 2003] [Heilman et al., 2003] [Husain and Rorden, 2003] [Karnath, 2001] [Karnath et al., 2001] [Marshall and Halligan, 1988] [Mattingley, 1998] [Payne et al., 1996] [Rafal, 1997] [Rees et al., 2000] [Robertson and Marshall, 1993] [Schiller et al., 1979] [Sprague, 1966] [Swick and Knight, 1998] [Vuilleumier et al., 1996] [Vuilleumier et al., 2002].
Non-dominant posterior-parietal-lobe damage can cause neglect when stimulus is in same space half as lobe {extinction, neglect}. In extinction, if something is on one side, people can see object, typically on right side, but they cannot see anything on other side, though brain activity is same in both cases (Geraint Rees).
agnosia
People with neglect can not recognize that they are neglecting space half {anosagnosia, neglect}. People with right-parietal-lobe damage can have paralysis but not know that they have it [Damasio, 1999] [Weiskrantz, 1997]. Perhaps, they have no information receptors for that part. Perhaps, they cannot direct attention there.
realization
People realize that they cannot see that space side if expected information is not available.
Biological Sciences>Medicine>Disease>Kinds>Organ>Nerve>Agnosia
4-Medicine-Disease-Kinds-Organ-Nerve-Agnosia
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0224