Fig 2. Correlation of right hippocampal activation in a template-space-based ROI with right hippocampal volume in subjects with MCI and control subjects during retrieval. Hippocampal volumes have been normalized by single-section intracranial area and hippocampal activation has been adjusted for subject age. Units of activation are represented as proportion of ROI activated. The line demonstrates a significant negative correlation between hippocampal volume and activation in the subjects with MCI.