1 research outputs found
Cerebellarâhippocampal processing in passive perception of visuospatial change
In addition to its role in visuospatial navigation and the generation of spatial representations, in recent years, the hippocampus has been proposed to support perceptual processes. This is especially the case where highâresolution details, in the form of fineâgrained relationships between features such as angles between components of a visual scene, are involved. An unresolved question is how, in the visual domain, perspectiveâchanges are differentiated from allocentric changes to these perceived feature relationships, both of which may be argued to involve the hippocampus. We conducted functional magnetic resonance imaging of the brain response (corroborated through separate eventârelated potential sourceâlocalization) in a passive visuospatial oddballâparadigm to examine to what extent the hippocampus and other brain regions process changes in perspective, or configuration of abstract, threeâdimensional structures. We observed activation of the left superior parietal cortex during perspective shifts, and right anterior hippocampus in configurationâchanges. Strikingly, we also found the cerebellum to differentiate between the two, in a way that appeared tightly coupled to hippocampal processing. These results point toward a relationship between the cerebellum and the hippocampus that occurs during perception of changes in visuospatial information that has previously only been reported with regard to visuospatial navigation