“…However, most studies have also noted concomitant decreased or increased changes in cerebral blood flow in other anatomical structures, such as unilateral or bilateral thalamic, prefrontal, frontal, amygdaline, striatal, cerebellar, occipital, precentral and post central areas (Eustache et al, 2000;Nardone et al, 2004). In some studies, no mesiotemporal changes, no cerebral changes, or a global hypo perfusion were detected (Chung et al, 2009). In summary, the imaging data derived from PET and SPECT studies are difficult to compare and interpret.…”