Abstract
Face recognition memory and the processing of tachistoscopically presented visual stimuli were investigated in two subjects with Capgras syndrome coexisting with vascular dementia. The subjects were both found to have impairment of face recognition memory as well as impairment of verbal recognition memory. One of the subjects was found to have a reversal of the usual advantage of the right hemisphere for processing perceptual stimuli which were visually similar. The failure to find this reversed pattern in the other subject was attributed to CT scan evidence of an old anterior infarct of his left hemisphere. The neuropsychological basis of Capgras syndrome is discussed in the light of these findings.
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