Electronic-database information

decline, and DLB. 2 Similar VH are also reported in CBS, which was originally observed in elderly and visually impaired people without psychiatric or neurological problems. However, a close resemblance between CBS and PD related VH is also suggested. Recent neuropathological and radiological studies revealed that VH in CBS are associated with hyperperfusion of the temporal cortex, striatum, and thalamus, as well as increased cerebral activation in the ventral extrastriatal region, while DLB patients with VH showed hypoperfusion or hypometabolism of the occipital cortex. It was also reported that PD patients with VH also have alterations in or decreased cerebral activation in the temporo-parietal, parietal, and occipital regions. Our patient showed atrophy of the bilateral parieto-occipital, occipital, and mild left temporal lobes and decreased cerebral perfusion in the parietal and frontal lobes, indicating that the VH in our case may be caused by dysfunction of these regions. Such VH are rarely experienced by normal people, but, once seen, some people may be convinced they are supernatural events. We neurologists pay attention to such reports, and note the similarity in content between ghost tales and VH, and pursue their mechanism of origin. In conclusion, we propose that some ghost sightings are actually VH in normal people, which occur very rarely but more frequently than we in the medical establishment think.