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Brain areas activated by stimuli in the left visual field of a right parietal patient suffering from left visual extinction were identified using event-related functional magnetic resonance imaging. Left visual field stimuli that were extinguished from awareness still activated the ventral visual cortex, including areas in the damaged right hemisphere. An extinguished face stimulus on the left produced robust category-specific activation of the right fusiform face area. On trials where the left visual stimulus was consciously seen rather than extinguished, greater activity was found in the ventral visual cortex of the damaged hemisphere, and also in frontal and parietal areas of the intact hemisphere. These findings extend recent observations on visual extinction, suggesting distinct neural correlates for conscious and unconscious perception.

Original publication




Journal article



Publication Date





387 - 393


Aged, Awareness, Brain Damage, Chronic, Cerebral Infarction, Dominance, Cerebral, Extinction, Psychological, Follow-Up Studies, Hemianopsia, Humans, Magnetic Resonance Imaging, Male, Neuropsychological Tests, Parietal Lobe, Perceptual Disorders