NEUROPSYCHOLOGY OF PALINOPSIC HALLUCINATIONS
Journal Title: Acta Neuropsychologica - Year 2003, Vol 1, Issue 2
Abstract
Background. The continued visual appearance of an object after its removal, for either an intermitten or noticeably sustained period of time, is known as palinopsia. Two types of palinopsic hallucinations are identified: Type 1hallucinations demonstrade size constancy and the newly proposed principle of semantic matching; Type 2 hallucinations obey Emmert's Law, as does afterimagery.Case report. The palinopsic hallucinations and neuropsychological test results of a man who sustained a penetrating injury in the right temporo-parietal area are presented.Conclusion. A theory is outlined in which semantic matchnig in Type 1 hallucinations is mediated by the right temporal lobe, and the perseverative palinopsic effect in both types of halluciantion is attributed to the reciprocal influence of cortical release and abnormal patterns of synchrony within thalamo-cortical visual pathways.
Authors and Affiliations
David Bradford
Keywords
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