Defect |
Localization |
Associated symptoms, signs |
Homonymous sectoranopia |
Lateral geniculate body |
Optic atrophy, hemianesthesia, hemiparesis |
Homonymous pie-in-the-sky |
Anterior temporal lobe |
Receptive aphasia (dominant hemisphere) |
Homonymous quadrantanopia |
Posterior optic radiations, visual cortex |
Hemisensory loss, depending on lateralization: hemineglect Gerstmann's syndrome |
Homonymous paracentral scotomas |
Posterior primary visual cortex |
Isolated symptom |
Macular-sparing homonymous hemianopia |
Primary visual cortex (sparing posterior portion) |
Isolated if occipital lobe |
Temporal crescent only |
Far anterior primary visual cortex |
Often isolated symptom |
Temporal crescent-sparing homonymous hemianopia |
Primary visual cortex (sparing far anterior portion) |
Isolated symptom |
Bilateral homonymous hemianopia |
Bilateral posterior optic radiations or primary visual cortex |
Anton's syndrome |