The hippocampal formation has been implicated in many disorders — including Alzheimer's disease, schizophrenia and depression — and in cognitive ageing, but how can one area be central to such diverse conditions? Small and colleagues review a large literature of neuroimaging findings and propose a framework of hippocampal dysfunction in which these conditions differentially target distinct subregions of the hippocampal circuit and are associated with either hippocampal hypermetabolism or hypometabolism.
- Scott A. Small
- Scott A. Schobel
- Carol A. Barnes
